阅读说明：本技术 一种脉冲信号产生电路及电子设备 (Pulse signal generating circuit and electronic equipment ) 是由 周代彬 王晓铎 余乐 于 2020-05-08 设计创作，主要内容包括：本申请公开了一种脉冲信号产生电路及电子设备,其中,所述脉冲信号产生电路利用氮化镓基晶体管作为第一开关模块和第二开关模块,结合频率和脉宽可调的第一控制信号和第二控制信号实现所述脉冲信号产生电路的重复频率和脉宽的精确控制,并且由于所述氮化镓基晶体管的高速开关和更低的导通损耗的特点,使得所述脉冲信号产生电路的脉冲输出频率和脉宽精度得到大大的提高,确保脉冲信号产生电路最终可以实现的脉冲输出频率达到100MHz甚至更高,脉冲的宽度可以实现从1ns到宽脉冲的精确可调。(The application discloses pulse signal produces circuit and electronic equipment, wherein, pulse signal produces the circuit and utilizes gallium nitride base transistor as first switch module and second switch module, combines frequency and first control signal of pulse width adjustable and second control signal to realize the accurate control of repetition frequency and pulse width of pulse signal production circuit, and because the high-speed switch of gallium nitride base transistor and the characteristics of lower conduction loss make pulse signal production circuit's pulse output frequency and pulse width precision obtain great improvement, ensure that the pulse output frequency that pulse signal production circuit finally can realize reaches 100MHz or even higher, and the width of pulse can realize from 1ns to the accurate of wide pulse adjustable.)

1. A pulse signal generating circuit, comprising: the power supply module, the first switch module and the second switch module; wherein the content of the first and second substances,

the power supply module is used for providing a first preset voltage, the anode of the power supply module is connected with the input end of the first switch module, and the cathode of the power supply module is connected with the input end of the second switch module;

the control end of the first switch module is used for receiving a first control signal, and the output end of the first switch module is connected with the output end of the second switch module and is used as the output end of the pulse signal generating circuit;

the control end of the second switch module is used for receiving a second control signal;

the first switch module and the second switch module both comprise at least one gallium nitride-based transistor;

the first control signal and the second control signal each include a plurality of consecutive first periods, the first periods including a first timing section, a second timing section, and a third timing section that are consecutive in timing;

in the first time period, the first control signal is used for controlling the first switch module to be switched on, and the second control signal is used for controlling the second switch module to be switched off, so that the voltage of the output end of the pulse signal generating circuit is pulled up to the first preset voltage;

in the second time sequence section, the first control signal is used for controlling the first switch module to be turned off, the second control signal is used for controlling the second switch module to be turned on so as to pull down the voltage at the output end of the pulse signal generating circuit to be a second preset voltage, and the second preset voltage is smaller than the first preset voltage;

in the third timing segment, the first control signal is used for controlling the first switch module to be turned off, and the second control signal is used for controlling the second switch module to be turned off, so that the voltage of the output end of the pulse signal generating circuit is kept at the second preset voltage.

2. The pulse signal generating circuit according to claim 1, wherein the first switching module comprises: a first transistor, a first resistor and a second resistor; wherein the content of the first and second substances,

the control end of the first transistor is connected with one end of the first resistor and one end of the second resistor, the other end of the first resistor is used for receiving the first control signal, and the other end of the second resistor is connected with the second end of the first transistor;

the first end of the first transistor is connected with the positive electrode of the power supply module, and the first transistor is a gallium nitride-based transistor.

3. The pulse signal generating circuit according to claim 2, wherein the first switching module further comprises: a first diode and a first filtering unit; wherein the content of the first and second substances,

the anode of the first diode is connected with the second resistor and the second end of the first transistor, and the cathode of the first diode is connected with the output end of the second switch module;

the first filtering unit is connected in parallel with the first transistor.

4. The pulse signal generating circuit according to claim 1, wherein the second switching module comprises: a second transistor, a third resistor, and a fourth resistor; wherein the content of the first and second substances,

the control end of the second transistor is connected with one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is used for receiving the second control signal, and the other end of the fourth resistor is connected with the first end of the second transistor;

and the second end of the second transistor is connected with the negative electrode of the power supply module, and the second transistor is a gallium nitride-based transistor.

5. The pulse signal generating circuit according to claim 4, wherein the second switching module further comprises: a second diode and a second filter unit; wherein the content of the first and second substances,

the cathode of the second diode is connected with the second end of the second transistor, and the anode of the second transistor is connected with the output end of the first switch module;

the second filtering unit is connected in parallel with the second transistor.

6. The pulse signal generating circuit according to claim 1, wherein the gallium nitride-based transistor is an N-type gallium nitride-based enhancement mode field effect transistor.

7. The pulse signal generating circuit according to claim 6, wherein the first control signal is at a high level during the first period;

the first control signal is at a low level in both the second timing segment and the third timing segment.

8. The pulse signal generating circuit according to claim 6, wherein the second control signal is low in both the first timing period and the third timing period;

the second control signal is at a high level in the second timing section.

9. The pulse signal generating circuit according to claim 1, wherein the power supply module comprises:

the device comprises a preset power supply and a first capacitor connected with the preset power supply in parallel.

10. An electronic device characterized by comprising the pulse signal generating circuit according to any one of claims 1 to 9.

Technical Field

The present disclosure relates to circuit design technologies, and more particularly, to a pulse signal generating circuit and an electronic device.

Background

Compared with common analog signals (such as sine waves), the pulse signal is characterized in that the waveforms are discontinuous on the Y axis (obvious intervals exist between the waveforms) but have certain periodicity. The most common pulse wave is a rectangular wave (i.e., a square wave) as shown in fig. 1.

The pulse signal generating circuit (or referred to as pulse power supply) is a circuit for generating a pulse signal, and its main parameter indexes include a pulse output frequency and a pulse width accuracy of the pulse signal.

With the rapid development of optical communication technology, quantum communication technology, laser technology, compact processing technology, etc., the conventional pulse power supply technology cannot meet the development requirements of the above industries in terms of pulse output frequency, pulse width precision, etc., and thus a pulse signal generating circuit having the characteristics of high pulse output frequency and high pulse width precision is urgently needed.

Disclosure of Invention

In order to solve the above technical problem, the present application provides a pulse signal generating circuit and an electronic device, so as to achieve the purpose of improving the pulse output frequency and the pulse width precision of the pulse signal generating circuit.

In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:

a pulse signal generating circuit comprising: the power supply module, the first switch module and the second switch module; wherein the content of the first and second substances,

the power supply module is used for providing a first preset voltage, the anode of the power supply module is connected with the input end of the first switch module, and the cathode of the power supply module is connected with the input end of the second switch module;

the control end of the first switch module is used for receiving a first control signal, and the output end of the first switch module is connected with the output end of the second switch module and is used as the output end of the pulse signal generating circuit;

the control end of the second switch module is used for receiving a second control signal;

the first switch module and the second switch module both comprise at least one gallium nitride-based transistor;

the first control signal and the second control signal each include a plurality of consecutive first periods, the first periods including a first timing section, a second timing section, and a third timing section that are consecutive in timing;

in the first time period, the first control signal is used for controlling the first switch module to be switched on, and the second control signal is used for controlling the second switch module to be switched off, so that the voltage of the output end of the pulse signal generating circuit is pulled up to the first preset voltage;

in the second time sequence section, the first control signal is used for controlling the first switch module to be turned off, the second control signal is used for controlling the second switch module to be turned on so as to pull down the voltage at the output end of the pulse signal generating circuit to be a second preset voltage, and the second preset voltage is smaller than the first preset voltage;

in the third timing segment, the first control signal is used for controlling the first switch module to be turned off, and the second control signal is used for controlling the second switch module to be turned off, so that the voltage of the output end of the pulse signal generating circuit is kept at the second preset voltage.

Optionally, the first switch module includes: a first transistor, a first resistor and a second resistor; wherein the content of the first and second substances,

the control end of the first transistor is connected with one end of the first resistor and one end of the second resistor, the other end of the first resistor is used for receiving the first control signal, and the other end of the second resistor is connected with the second end of the first transistor;

the first end of the first transistor is connected with the positive electrode of the power supply module, and the first transistor is a gallium nitride-based transistor.

Optionally, the first switch module further includes: a first diode and a first filtering unit; wherein the content of the first and second substances,

the anode of the first diode is connected with the second resistor and the second end of the first transistor, and the cathode of the first diode is connected with the output end of the second switch module;

the first filtering unit is connected in parallel with the first transistor.

Optionally, the second switch module includes: a second transistor, a third resistor, and a fourth resistor; wherein the content of the first and second substances,

the control end of the second transistor is connected with one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is used for receiving the second control signal, and the other end of the fourth resistor is connected with the first end of the second transistor;

and the second end of the second transistor is connected with the negative electrode of the power supply module, and the second transistor is a gallium nitride-based transistor.

Optionally, the second switch module further includes: a second diode and a second filter unit; wherein the content of the first and second substances,

the cathode of the second diode is connected with the second end of the second transistor, and the anode of the second transistor is connected with the output end of the first switch module;

the second filtering unit is connected in parallel with the second transistor.

Optionally, the gallium nitride-based transistor is an N-type gallium nitride-based enhancement mode field effect transistor.

Optionally, the first control signal is at a high level in the first time period;

the first control signal is at a low level in both the second timing segment and the third timing segment.

Optionally, the second control signal is at a low level in both the first timing period and the third timing period;

the second control signal is at a high level in the second timing section.

Optionally, the power module includes:

the device comprises a preset power supply and a first capacitor connected with the preset power supply in parallel.

An electronic device comprising a pulse signal generating circuit as claimed in any one of the preceding claims.

It can be seen from the foregoing technical solutions that the embodiments of the present application provide a pulse signal generating circuit and an electronic device, where the pulse signal generating circuit utilizes a gallium nitride-based transistor as a first switch module and a second switch module, and combines a first control signal and a second control signal with adjustable frequency and pulse width to achieve accurate control of repetition frequency and pulse width of the pulse signal generating circuit, and due to the characteristics of high-speed switching and lower conduction loss of the gallium nitride-based transistor, pulse output frequency and pulse width accuracy of the pulse signal generating circuit are greatly improved, so that it is ensured that the pulse output frequency that the pulse signal generating circuit can finally achieve reaches 100MHz or even higher, and the pulse width can be accurately adjusted from 1ns to a wide pulse.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a pulse signal;

fig. 2 is a schematic structural diagram of a pulse signal generating circuit according to an embodiment of the present application;

FIG. 3 is a timing diagram of a first control signal, a second control signal and a final output pulse signal according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a pulse signal generating circuit according to another embodiment of the present application;

fig. 5 is a schematic structural diagram of a pulse signal generating circuit according to yet another embodiment of the present application;

fig. 6 is a schematic structural diagram of a pulse signal generating circuit according to yet another embodiment of the present application;

fig. 7 is a schematic structural diagram of a pulse signal generating circuit according to an alternative embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

An embodiment of the present application provides a pulse signal generating circuit, as shown in fig. 2, including: a power module 100, a first switch module 200, and a second switch module 300; wherein the content of the first and second substances,

the power module 100 is configured to provide a first preset voltage, an anode of the power module 100 is connected to an input terminal of the first switch module 200, and a cathode of the power module 100 is connected to an input terminal of the second switch module 300;

the control end of the first switch module 200 is configured to receive a first control signal, and the output end of the first switch module 200 is connected to the output end of the second switch module 300, and is used as the output end of the pulse signal generating circuit;

the control end of the second switch module 300 is configured to receive a second control signal;

the first and second switch modules 200 and 300 each include at least one gallium nitride-based transistor;

the first control signal and the second control signal each include a plurality of consecutive first periods, the first periods including a first timing section, a second timing section, and a third timing section that are consecutive in timing;

in the first timing period, the first control signal is used to control the first switch module 200 to be turned on, and the second control signal is used to control the second switch module 300 to be turned off, so as to raise the voltage at the output end of the pulse signal generating circuit to the first preset voltage;

in the second timing segment, the first control signal is used to control the first switch module 200 to turn off, the second control signal is used to control the second switch module 300 to turn on, so as to pull down the voltage at the output end of the pulse signal generating circuit to a second preset voltage, and the second preset voltage is smaller than the first preset voltage;

in the third timing segment, the first control signal is used to control the first switch module 200 to turn off, and the second control signal is used to control the second switch module 300 to turn off, so as to maintain the voltage at the output end of the pulse signal generating circuit at the second preset voltage.

In this embodiment, during the first timing period, the first control signal and the second control signal are matched with each other, so that the first switch module 200 is turned on, the second switch module 300 is turned off, the path between the output end of the pulse signal generating circuit and the anode of the power module 100 is turned on, the voltage at the output end of the pulse signal generating circuit is pulled up to the first preset voltage, and the first preset voltage is the same as the output voltage of the power module 100.

In the first time period, the duration of the first time period is positively correlated with the high level duration of the finally required pulse signal, and in general, since a time period is required for the voltage pull-up process of the output terminal of the pulse signal generation circuit, the duration of the first time period is longer than the high level duration of the finally required pulse signal.

In the second time segment, the first control signal controls the first switch module 200 to turn off, the voltage at the output end of the pulse signal generating circuit starts to drop, and the second control signal controls the second switch module 300 to turn on at the same time, so that the output end of the pulse signal generating circuit is directly connected with the negative electrode or the fixed potential end of the power module 100, thereby accelerating the drop of the voltage at the output end of the pulse signal generating circuit and generating the finally required falling edge of the pulse signal.

Finally, in the third time segment, the first control signal and the second control signal respectively control the first switch module 200 and the second switch module 300 to turn off, so that the finally output signal is kept in a low level state, and the duration of the third time segment is positively correlated with the low level duration of the finally required pulse signal.

In fig. 2, Vout denotes an output terminal of the pulse signal generating circuit.

Referring to fig. 3, fig. 3 shows a possible timing relationship diagram of the first control signal, the second control signal and the finally output pulse signal.

The first control signal, the second control signal and the third control signal can all be generated by a high-speed programmable device to achieve more accurate control.

In fig. 2, T1 denotes a first timing section, T2 denotes a second timing section, T3 denotes a third timing section, INA denotes a first control signal, INB denotes a second control signal, Vout denotes a pulse signal output from an output terminal of the pulse signal generation circuit, and Tdelay denotes a delay of the first control signal and a finally formed pulse signal.

In this embodiment, the pulse signal generating circuit uses a gallium nitride-based transistor as the first switch module 200 and the second switch module 300, and combines the first control signal and the second control signal with adjustable frequency and pulse width to realize the precise control of the repetition frequency and pulse width of the pulse signal generating circuit, and due to the characteristics of high-speed switching and lower conduction loss of the gallium nitride-based transistor, the pulse output frequency and pulse width precision of the pulse signal generating circuit are greatly improved, so that the pulse output frequency which can be finally realized by the pulse signal generating circuit is ensured to reach 100MHz or even higher, and the pulse width (generally, the pulse width refers to the duration of one high level of the pulse) can be precisely adjusted from 1ns to a wide pulse.

A specific possible structure of each module of the pulse signal generating circuit provided in the embodiment of the present application is described below.

In one embodiment of the present application, referring to fig. 4, the first switch module 200 includes: a first transistor Q1, a first resistor R1, and a second resistor R2; wherein the content of the first and second substances,

a control terminal of the first transistor Q1 is connected to both one terminal of the first resistor R1 and one terminal of the second resistor R2, the other terminal of the first resistor R1 is configured to receive the first control signal, and the other terminal of the second resistor R2 is connected to a second terminal of the first transistor Q1;

the first terminal of the first transistor Q1 is connected to the positive terminal of the power module 100, and the first transistor Q1 is a gallium nitride-based transistor.

The second switch module 300 includes: a second transistor Q2, a third resistor R3, and a fourth resistor R4; wherein the content of the first and second substances,

a control end of the second transistor Q2 is connected to one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the third resistor R3 is configured to receive the second control signal, and the other end of the fourth resistor R4 is connected to a first end of the second transistor Q2;

the second end of the second transistor Q2 is connected to the negative terminal of the power module 100, and the second transistor Q2 is a gallium nitride-based transistor.

In fig. 4, the first resistor R1 and the second resistor R2 are used to bias the first transistor Q1 to a desired operating state, and the third resistor R3 and the fourth resistor R4 are used to bias the second transistor Q2 to a desired operating state.

The first transistor Q1 and the second transistor Q2 are both gallium nitride-based transistors, and due to the characteristics of high-speed switching and lower conduction loss of the gallium nitride-based transistors, the switching frequency of the first switch module 200 and the switching frequency of the second switch module 300 can be higher, which is beneficial to improving the pulse output frequency of finally obtained pulse signals.

When the first transistor Q1 and the second transistor Q2 are both gallium nitride-based field effect transistors, the control terminals of the first transistor Q1 and the second transistor Q2 are both gates, and the first terminal and the second terminal of the first transistor Q1 and the second transistor Q2 are respectively a source and a drain.

Optionally, referring to fig. 5, the first switch module 200 further includes: a first diode and a first filtering unit; wherein the content of the first and second substances,

the anode of the first diode is connected with the second resistor R2 and the second end of the first transistor Q1, and the cathode of the first diode is connected with the output end of the second switch module 300;

the first filtering unit is connected in parallel with the first transistor Q1.

The second switch module 300 further includes: a second diode and a second filter unit; wherein the content of the first and second substances,

the cathode of the second diode is connected to the second end of the second transistor Q2, and the anode of the second transistor Q2 is connected to the output end of the first switch module 200;

the second filtering unit is connected in parallel with the second transistor Q2.

The first diode for preventing current reversal and voltage clamping and the second diode for preventing current backflow from the output terminal of the pulse signal generating circuit to the first switching module 200, and the second diode for preventing current backflow from the second switching module 300 to the output terminal of the pulse signal generating circuit, in particular.

The first filtering unit and the second filtering unit are both used for filtering stray signals possibly input by the power module 100 or the outside, and improving the working stability of the first switch module 200 and the second switch module 300.

Optionally, referring to fig. 6, the first filtering unit includes: a fifth resistor R5 and a second capacitor C2 which are connected in series;

one end of the first filtering unit is connected to the first end of the first transistor Q1, and the other end is connected to the second end of the first transistor Q1.

The second filtering unit includes: a sixth resistor R6 and a third capacitor C3 which are connected in series;

one end of the second filtering unit is connected to the first end of the second transistor Q2, and the other end is connected to the second end of the second transistor Q2.

In another embodiment of the present application, a possible timing of the first control signal and the second control signal is provided, still referring to fig. 3, when the gan-based transistor is an N-type gan-based enhancement mode fet, that is, the first transistor Q1 and the second transistor Q2 are both N-type gan-based enhancement mode fets, the first control signal is at a high level during the first timing period;

the first control signal is at a low level in both the second timing segment and the third timing segment.

The second control signal is at a low level in both the first time period and the third time period;

the second control signal is at a high level in the second timing section.

Certainly, in other embodiments of the present application, the gallium nitride-based transistor may also be a P-type gallium nitride-based enhancement mode field effect transistor, that is, the first transistor Q1 and the second transistor Q2 are both P-type gallium nitride-based enhancement mode field effect transistors, and at this time, the first control signal is at a low level in the first time period;

the first control signal is at a high level in both the second timing segment and the third timing segment.

The second control signal is at a high level in both the first time sequence section and the third time sequence section;

the second control signal is at a low level in the second timing section.

The specific type of the gallium nitride-based transistor and the specific timing sequence of the first control signal and the second control signal are not limited in the present application, and are determined according to the actual situation.

The high level is a level higher in potential than a reference potential, and the low level is a level lower in potential than the reference potential, for example, when the reference potential is a ground potential, the high level is a positive level higher than the ground potential by a certain potential value, and the low level is a negative level lower than the low level by a certain potential value.

Alternatively, referring to fig. 7, the power module 100 includes:

a preset power supply U1 and a first capacitor C1 connected in parallel with the preset power supply U1.

The preset power supply U1 is a high-voltage power supply providing a preset voltage, and the first capacitor C1 is used for filtering an alternating current part in the preset power supply U1, thereby avoiding possible adverse effects of the alternating current part on the first switch module 200 and the second switch module 300.

In addition, fig. 4 to 7 also show a seventh resistor R7, one end of which is connected to both the output terminal of the first switch module 200 and the output terminal of the second switch module 300, and the other end of which is connected to the negative electrode of the power module 100.

Correspondingly, the embodiment of the application also provides an electronic device, which comprises the pulse signal generating circuit.

To sum up, the embodiment of the present application provides a pulse signal generating circuit and electronic equipment, wherein, the pulse signal generating circuit utilizes gallium nitride base transistor as first switch module 200 and second switch module 300, combines first control signal and the second control signal of frequency and pulse width adjustable to realize the accurate control of repetition frequency and pulse width of pulse signal generating circuit, and because the high-speed switch of gallium nitride base transistor and the characteristics of lower conduction loss make pulse signal generating circuit's pulse output frequency and pulse width accuracy obtain great improvement, ensure that the pulse output frequency that pulse signal generating circuit can finally realize reaches 100MHz even higher, and the width of pulse can realize from 1ns to the accurate adjustable of wide pulse.

Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.