阅读说明：本技术 单端转差分信号驱动电路 (Single-end to differential signal driving circuit ) 是由 杨权龙 于 2019-11-29 设计创作，主要内容包括：本发明提供了一种单端转差分信号驱动电路,包括同相放大器模块、反相放大器模块、电平抬升电路,所述电平抬升电路分别与所述同相放大器模块、反相放大器模块电连接,所述同相放大器模块与所述反相放大器模块电连接,本发明的有益效果在于：单端转差分信号驱动电路的精度高,抗干扰能力强,合理地降低了生产成本,缩短了产品的生产周期；同时具备低失调、强驱动能力,可以很好的作为AD的驱动电路。(The invention provides single-end-to-differential signal driving circuits, which comprise an in-phase amplifier module, an inverting amplifier module and a level lifting circuit, wherein the level lifting circuit is respectively electrically connected with the in-phase amplifier module and the inverting amplifier module, and the in-phase amplifier module is electrically connected with the inverting amplifier module.)

The single-ended-to-differential signal driving circuit is characterized by comprising an in-phase amplifier module, an inverting amplifier module and a level lifting circuit, wherein the level lifting circuit is electrically connected with the in-phase amplifier module and the inverting amplifier module respectively, and the in-phase amplifier module is electrically connected with the inverting amplifier module.

2. The single-ended to differential signal driver circuit as claimed in claim 1, wherein the non-inverting amplifier module comprises th amplifier module, R1, R4, R5, and a second amplifier module, wherein the negative input terminal of the th amplifier module is connected to the R1 terminal of the resistor, R1 is connected to ground, the other terminal of the resistor R1 is connected to the R4 terminal, the other terminal of the resistor R4 is connected to the output terminal of the second amplifier module, the output terminal of the th amplifier module is connected to the R5 terminal, the other 5 terminal of the resistor R is connected to the positive input terminal of the second amplifier module, the negative input terminal of the second amplifier module is connected to the input terminal of the second amplifier module, and the input terminal of the second amplifier module is connected to the AD module.

3. The single-ended to differential signal driving circuit as claimed in claim 1, wherein the inverting amplifier module comprises a third amplifier module, a resistor R8, a resistor R9, a resistor R10, and a fourth amplifier module, wherein the negative input terminal of the third amplifier module is connected to the resistor R8 , the other terminal of the resistor R8 is connected to the single-ended input terminal, the negative input terminal of the resistor R9 is connected to the negative input terminal of the third amplifier module, the output terminal of the third amplifier module is connected to the resistor R10 , the other terminal of the resistor R10 is connected to the positive input terminal of the fourth amplifier module, the other terminal of the resistor R9 is connected to the output terminal of the fourth amplifier module, and the output terminal of the fourth amplifier module is connected to the AD module.

4. The single-ended to differential signal driving circuit as claimed in claim 1, wherein the level-up circuit module comprises a resistor R2, a resistor R3, a resistor R6, and a resistor R7, wherein the resistor R2 is connected to the positive input terminal of the th amplifier module, the resistor R2 is connected to the other 630 terminal of the resistor R2, the resistor R3 is connected to the positive input terminal of the th amplifier module, the resistor R3 is connected to the other terminal of the resistor R6 , the resistor R6 is connected to the other terminal of the resistor R6 is connected to the positive input terminal of the third amplifier module, the resistor R7 is connected to ground, the resistor R3 is connected to the Vref terminal, the resistor R7 is connected to the other terminal of the resistor R is connected to the positive input terminal of the third amplifier module, and the resistor R6 is connected to the Vref terminal.

5. The single-ended to differential signal driver circuit of claim 1, wherein said th amplifier module, resistor R5 and said second amplifier module form a new operational amplifier.

6. The single-ended to differential signal driver circuit of claim 1, wherein: the third amplifier module, the resistor R10 and the fourth amplifier module form a new operational amplifier.

7. The single-ended to differential signal driver circuit of claim 2, wherein said th and third amplifier modules are powered by dual power sources.

8. The single-ended to differential signal driver circuit of claim 3, wherein: and the second amplifier module and the fourth amplifier module adopt a single power supply for power supply.

[ technical field ] A method for producing a semiconductor device

The invention relates to an differential signal circuit, in particular to a single-ended to differential signal driving circuit.

[ background of the invention ]

In electronic products, differential signal circuits are often used in analog-to-digital converters (ADCs), twisted pair cable signal transmission circuits, etc., but in practical cases, signals appear more in the form of single-ended signals, and in order to perform analog-to-digital conversion, signals need to be converted from the single-ended signals to differential signals, so the conversion circuits are also used in the electronic field by , but the current single-ended signal to differential signal driving circuit does not have low offset and strong driving capability at the same time.

[ summary of the invention ]

The invention aims to solve the defects that the conventional single-ended signal to differential signal driving circuit does not simultaneously have low offset and strong driving capability, and provides novel single-ended to differential signal driving circuits.

The invention is realized by the following technical scheme:

kinds of single-ended changes differential signal drive circuit, including homophase amplifier module, inverting amplifier module, level lifting circuit respectively with homophase amplifier module, inverting amplifier module electricity are connected, homophase amplifier module with inverting amplifier module electricity is connected.

, the non-inverting amplifier module includes a amplifier module, a resistor R1, a resistor R4, a resistor R5, and a second amplifier module, wherein the negative input terminal of the 0 amplifier module is connected to the resistor R1 , the resistor R1 is connected to the ground, the other terminal of the resistor R1 is connected to the resistor R4 , the other terminal of the resistor R4 is connected to the output terminal of the second amplifier module, the output terminal of the amplifier module is connected to the resistor R5 , the other terminal of the resistor R5 is connected to the positive input terminal of the second amplifier module, the negative input terminal of the second amplifier module is connected to the input/output terminal of the second amplifier module, and the input/output terminal of the second amplifier module is connected to the AD module.

, the inverting amplifier module includes a third amplifier module, a resistor R8, a resistor R9, a resistor R10, and a fourth amplifier module, wherein a negative input terminal of the third amplifier module is connected to the resistor R8 , another terminal of the resistor R8 is connected to the single-ended input terminal, a negative input terminal of the resistor R9 is connected to the negative input terminal of the third amplifier module, an output terminal of the third amplifier module is connected to the resistor R10 , another terminal of the resistor R10 is connected to the positive input terminal of the fourth amplifier module, another terminal of the resistor R9 is connected to the output terminal of the fourth amplifier module, and an output terminal of the fourth amplifier module is connected to the AD module.

, the level-up circuit module includes a resistor R2, a resistor R3, a resistor R6, and a resistor R7, the resistor R2 is connected to the positive input terminal of the -th amplifier module, the other of the resistor R2 is connected to the single-ended input terminal, the resistor R3 is connected to the positive input terminal of the -th amplifier module, the other of the resistor R3 is connected to the R6 of the resistor R6 , and the other of the resistor R6 is connected to the third amplifier moduleThe positive input end of the module is connected, the resistor R7 is connected with the ground reference, and the other end of the resistor R3 is connected with V_refThe resistor R7 has another connected to the positive input terminal of the third amplifier module, and the resistor R6 has another connected to V_refConnected with each other.

, the amplifier module, the resistor R5 and the second amplifier module constitute a new operational amplifier.

, the third amplifier module, the resistor R10 and the fourth amplifier module constitute a new operational amplifier.

, the amplifier module and the third amplifier module are powered by double power supplies.

And , the second amplifier module and the fourth amplifier module are powered by a single power supply.

The invention has the beneficial effects that:

(1) the amplifier module, the resistor R5 and the second amplifier module form a new operational amplifier, the third amplifier module, the resistor R10 and the fourth amplifier module form a new operational amplifier, and the performance of the whole circuit can be improved;

(2) the single-end-to-differential signal conversion circuit has high precision and strong anti-interference capability, reasonably reduces the production cost and shortens the production period of products;

(3) meanwhile, the driving circuit has low offset and strong driving capability and can be well used as an AD driving circuit.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a single-ended to differential signal driving circuit according to the present invention;

reference numerals: 1. a non-inverting amplifier module; 2. an inverting amplifier module; 3. a level-up circuit.

[ detailed description ] embodiments

The invention is further described with reference to the drawings and the detailed description:

as shown in fig. 1, single-ended to differential signal driving circuits include an in-phase amplifier module 1, an inverting amplifier module 2, and a level-raising circuit module 3, where the level-raising circuit module 3 is electrically connected to the in-phase amplifier module 1 and the inverting amplifier module 2, respectively, and the in-phase amplifier module 1 is electrically connected to the inverting amplifier module 2.

Preferably, the non-inverting amplifier module 1 includes a th amplifier module, a resistor R1, a resistor R4, a resistor R5, and a second amplifier module, a negative input terminal of the th amplifier module is connected to the resistor R1 , the resistor R1 is connected to ground, another terminal of the resistor R1 is connected to the resistor R4 , another terminal of the resistor R4 is connected to an output terminal of the second amplifier module, an output terminal of the th amplifier module is connected to the resistor R5 , another terminal of the resistor R5 is connected to a positive input terminal of the second amplifier module, a negative input terminal of the second amplifier module is connected to an input/output terminal of the second amplifier module, and an input/output terminal of the second amplifier module is connected to the AD module.

Preferably, the inverting amplifier module 2 includes a third amplifier module, a resistor R8, a resistor R9, a resistor R10, and a fourth amplifier module, wherein a negative input terminal of the third amplifier module is connected to the resistor R8 , another terminal of the resistor R8 is connected to a single-ended input terminal, a R9 terminal of the resistor is connected to a negative input terminal of the third amplifier module, an output terminal of the third amplifier module is connected to the resistor R10 , another terminal of the resistor R10 is connected to a positive input terminal of the fourth amplifier module, another terminal of the resistor R9 is connected to an output terminal of the fourth amplifier module, and an output terminal of the fourth amplifier module is connected to an AD module.

Preferably, the level-lifting circuit module 3 includes a resistor R2, a resistor R3, a resistor R6, and a resistor R7, wherein the end of the resistor R2 is connected to the positive input end of the th amplifier module, the end of the resistor R2, another , is connected to the single-ended input end, the end of the resistor R3 is connected to the positive input end of the th amplifier module, the end of the resistor R3, another , is connected to the end of the resistor R6 , and the end of the resistor R6, another , is connected to the positive input end of the third amplifier moduleThe resistor R7 is connected to ground, the resistor R3 is connected to another and V_refThe resistor R7 has another connected to the positive input terminal of the third amplifier module, and the resistor R6 has another connected to V_refConnected with each other.

Preferably, the th amplifier module, the resistor R5 and the second amplifier module constitute a new operational amplifier.

Preferably, the third amplifier module, the resistor R5 and the fourth amplifier module constitute a new operational amplifier.

Preferably, the amplifier module and the third amplifier module are powered by double power supplies.

Preferably, the second amplifier module and the fourth amplifier module are powered by a single power supply.

Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should fall within the scope of the claims of the present invention.