阅读说明：本技术 一种通话稳定的pcm综合复用设备 (PCM comprehensive multiplexing equipment with stable conversation ) 是由 吴益伟 李统孝 余清华 凌秋立 陈宣林 郑晓 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种通话稳定的PCM综合复用设备,包括振铃信号模块、SLIC芯片和电源电路；所述电源电路包括主电源和磁珠,所述磁珠的一端连接至主电源,另一端输出隔离电源；所述隔离电源和主电源均连接至SLIC芯片,以提供不同的电源；所述振铃信号模块连接至SLIC芯片,以提供振铃信号和反馈电源；所述磁珠输出隔离电源的一端还串联有电解电容6EC4后接地,所述电解电容6EC4的正极连接至磁珠。本发明能够通过提供SLIC控制芯片不同的电源,进而提高SLIC芯片内部各个集成器件工作的稳定性。(The invention discloses PCM comprehensive multiplexing equipment with stable conversation, which comprises a ringing signal module, an SLIC chip and a power supply circuit, wherein the ringing signal module is connected with the SLIC chip; the power supply circuit comprises a main power supply and a magnetic bead, one end of the magnetic bead is connected to the main power supply, and the other end of the magnetic bead outputs an isolated power supply; the isolation power supply and the main power supply are connected to the SLIC chip to provide different power supplies; the ringing signal module is connected to the SLIC chip to provide a ringing signal and a feedback power supply; one end of the magnetic bead output isolation power supply is also connected with an electrolytic capacitor 6EC4 in series and then is grounded, and the anode of the electrolytic capacitor 6EC4 is connected to the magnetic bead. The invention can improve the working stability of each integrated device in the SLIC chip by providing different power supplies for the SLIC control chip.)

1. The PCM comprehensive multiplexing equipment with stable conversation is characterized by comprising a ringing signal module (1), an SLIC chip (2) and a power supply circuit (3); the power supply circuit (3) comprises a main power supply (31) and magnetic beads (32), one end of each magnetic bead (32) is connected to the main power supply (31), and the other end of each magnetic bead outputs an isolated power supply; the isolated power supply and the main power supply (31) are both connected to the SLIC chip (2) to provide different power supplies; the ringing signal module (1) is connected to the SLIC chip (2) to provide a ringing signal and a feedback power supply; one end of the magnetic bead (32) outputting the isolation power supply is also connected with an electrolytic capacitor 6EC4 in series and then grounded, and the anode of the electrolytic capacitor 6EC4 is connected to the magnetic bead (32).

2. The PCM comprehensive multiplexing device with stable conversation as claimed in claim 1, wherein the power pin of the ringing signal module (1) is connected in series with an inductor 6L2 and then connected to the main power (31), one end of the inductor 6L2 connected with the power pin of the ringing signal module (1) is also connected with an electrolytic capacitor 6EC2 and then grounded; the positive electrode of the electrolytic capacitor 6EC2 is connected with the inductor 6L 2.

3. The PCM integrated multiplexing device with stable call according to claim 1, further comprising a driver enhancement chip (4), wherein two input terminals of the driver enhancement chip (4) are connected to a control circuit (5), two output terminals thereof are respectively connected to the clock pin and the transmission pin of the SLIC chip (2), and the driver enhancement chip (4) is a 75HC245 chip.

4. The PCM comprehensive multiplexing device with stable call according to claim 3, further comprising a point-to-point physical setting circuit (6), a real-time call circuit (7) and a video transmission circuit (8) which are all electrically connected with the control circuit (5); the point-to-point physical setting circuit (6) comprises a display component (61) and a dial switch (62) which are electrically connected with the control circuit (5), and a dial of the dial switch (62) is used for being dialed by a person; the control circuit (5) acquires the switch state of the dial switch (62) and arranges the switch state into a binary number value, and the control circuit (5) also converts the binary number value into a decimal number value and sends the decimal number value to the display component (61) for display; the control circuit (5) matches a target machine corresponding to the binary numerical value through a real-time call circuit (7) or a video transmission circuit (8); and after the matching is finished, communication connection is established, and communication interaction is carried out through the real-time call circuit (7) or the video transmission circuit (8).

5. The PCM comprehensive multiplexing device with stable call according to claim 4, wherein the control circuit (5) comprises a main control circuit (51) and an auxiliary control circuit (52), the display component (61) and the dial switch (62) are both electrically connected with the auxiliary control circuit (52), the auxiliary control circuit (52) is electrically connected with the main control circuit (51), and the real-time call circuit (7) and the video transmission circuit (8) are both electrically connected with the main control circuit (51); the auxiliary control circuit (52) acquires the switch state of the dial switch (62), sends the switch state to the display component (61) for display, and also sends the switch state to the main control circuit (51), and the main control circuit (51) matches a target machine corresponding to the switch state through the real-time call circuit (7) or the video transmission circuit (8); two input ends of the drive enhancement chip (4) are connected to a main control circuit (51).

6. PCM integrated multiplexing device with stable speech according to claim 5, characterized in that the secondary control circuit (52) sends the binary value to the primary control circuit (51) by means of an interrupt, the interrupt priority being the highest priority.

7. PCM integrated multiplexing device with stable speech according to claim 5, characterized in that the dial-in toggle status of the dial-switch (62) is sent to the auxiliary control circuit (52) by means of an interrupt, the interrupt priority being the highest priority.

8. PCM integrated multiplexing device with stable talking according to claim 5, characterized in that said master control circuit (51) also transmits binary values through optical fibers to match the destination machine corresponding to the binary values.

9. The PCM comprehensive multiplexing device with stable conversation according to claim 5, characterized by further comprising a phase-locked loop circuit (9) and a driving circuit (10), wherein the phase-locked loop circuit (9) comprises a 74HC4046 chip, the driving circuit (10) comprises a 74HC245 chip, and a main signal output end and a comparison signal output end of the main control circuit (51) are respectively and electrically connected with two signal input ends of the 74HC245 chip; the 74HC245 chip is electrically connected with a first signal input end and a second signal input end of the 74HC4046 chip respectively corresponding to two output ends of the main signal and the comparison signal; and the output end of the 74HC4046 chip outputs a frequency-doubled or frequency-divided signal.

Technical Field

The invention relates to the technical field of communication equipment, in particular to PCM comprehensive multiplexing equipment with stable conversation.

Background

The PCM comprehensive multiplexing equipment carries out pulse code modulation on various communication modes and is suitable for telephones, the comprehensive multiplexing equipment is widely used in troops, public security and banks, the provided communication service function is very powerful, and the communication quality is caused by unstable communication effect due to the fact that the commonly used place has very high requirement on the stability of communication. The circuit for optimizing power supply control of SLIC chip of application number 201820608112.9 discloses a peripheral circuit of SLIC chip with optimized circuit size, but the control chip in SLIC basically needs multiple power supplies to supply power to meet the working requirements of each integrated device in the circuit, and the control chip still uses the same power supply to supply power in the circuit disclosed by the scheme, so that the control chip is easy to work unstably.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the PCM comprehensive multiplexing equipment with stable conversation, which can improve the working stability of each integrated device in an SLIC chip by providing different power supplies of the SLIC control chip.

In order to achieve the purpose, the invention provides the following technical scheme: a PCM integrated multiplexing device with stable conversation comprises a ringing signal module, an SLIC chip and a power supply circuit; the power supply circuit comprises a main power supply and a magnetic bead, one end of the magnetic bead is connected to the main power supply, and the other end of the magnetic bead outputs an isolated power supply; the isolation power supply and the main power supply are connected to the SLIC chip to provide different power supplies; the ringing signal module is connected to the SLIC chip to provide a ringing signal and a feedback power supply; one end of the magnetic bead output isolation power supply is also connected with an electrolytic capacitor 6EC4 in series and then is grounded, and the anode of the electrolytic capacitor 6EC4 is connected to the magnetic bead.

As a further improvement of the invention, a power supply pin of the ringing signal module is connected in series with an inductor 6L2 and then is connected to a main power supply, and one end of the inductor 6L2 connected with the power supply pin of the ringing signal module is also connected with an electrolytic capacitor 6EC2 and then is grounded; the positive electrode of the electrolytic capacitor 6EC2 is connected with the inductor 6L 2.

As a further improvement of the present invention, the present invention further comprises a driving enhancement chip, two input ends of the driving enhancement chip are connected to a control circuit, two output ends of the driving enhancement chip are respectively connected to the clock pin and the transmission pin of the SLIC chip, and the driving enhancement chip is a 75HC245 chip.

As a further improvement of the invention, the system also comprises a point-to-point physical setting circuit, a real-time call circuit and a video transmission circuit which are electrically connected with the control circuit; the point-to-point physical setting circuit comprises a display component and a dial switch which are electrically connected with the control circuit, and a dial of the dial switch is used for being dialed by a person; the control circuit acquires the on-off state of the dial switch and arranges the on-off state into a binary number value, and the control circuit also converts the binary number value into a decimal numerical value and sends the decimal numerical value to the display component for display; the control circuit matches the target machine corresponding to the binary numerical value through a real-time call circuit or a video transmission circuit; and after the matching is finished, communication connection is established, and communication interaction is carried out through the real-time call circuit or the video transmission circuit.

As a further improvement of the invention, the control circuit comprises a main control circuit and an auxiliary control circuit, the display assembly and the dial switch are both electrically connected with the auxiliary control circuit, the auxiliary control circuit is electrically connected with the main control circuit, and the real-time call circuit and the video transmission circuit are both electrically connected with the main control circuit; the auxiliary control circuit acquires the on-off state of the dial switch and sends the on-off state to the display assembly for displaying, and also sends the on-off state to the main control circuit, and the main control circuit matches a target machine corresponding to the on-off state through the real-time call circuit or the video transmission circuit; and two input ends of the driving enhancement chip are connected to the main control circuit.

As a further improvement of the present invention, the secondary control circuit sends a binary value to the primary control circuit by an interrupt, and the interrupt priority is the highest priority.

As a further improvement of the invention, the dial-up state of the dial-up switch is sent to the auxiliary control circuit by interruption, and the interruption priority is the highest priority.

As a further improvement of the present invention, the main control circuit can also transmit a binary value through an optical fiber to match a target machine corresponding to the binary value.

As a further improvement of the invention, the phase-locked loop circuit comprises a 74HC4046 chip, the driving circuit comprises a 74HC245 chip, and a main signal output end and a comparison signal output end of the main control circuit are respectively and electrically connected with two signal input ends of the 74HC245 chip; the 74HC245 chip is electrically connected with a first signal input end and a second signal input end of the 74HC4046 chip respectively corresponding to two output ends of the main signal and the comparison signal; and the output end of the 74HC4046 chip outputs a frequency-doubled or frequency-divided signal.

The invention has the advantages that the prior art generally adopts the same power supply to directly supply power to a plurality of integrated components, but the scheme is easily interfered by the fluctuation of the power supply. The isolation power supply can be further filtered through the electrolytic capacitor 6EC4, the stability of the isolation power supply is improved, and the SLIC chip works more stably.

Drawings

Fig. 1 is a schematic diagram of a connecting structure of SLIC chips according to the present invention;

FIG. 2 is a schematic diagram of the overall structure of the matching circuit of the present invention;

fig. 3 is a schematic diagram of a driving circuit structure according to the present invention.

Reference numerals: 1. a ringing signal module; 2. a SLIC chip; 3. a power supply circuit; 31. a main power supply; 32. magnetic beads; 4. a drive enhancing chip; 5. a control circuit; 51. a master control circuit; 52. an auxiliary control circuit; 6. a point-to-point physical setup circuit; 61. a display component; 62. a dial switch; 7. a real-time telephony circuit; 8. a video transmission circuit; 9. a phase-locked loop circuit; 10. a drive circuit.

Detailed Description

The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.

Referring to fig. 1-3, a PCM integrated multiplexing device with stable call of this embodiment includes a ringing signal module 1, a SLIC chip 2, and a power supply circuit 3; the power supply circuit 3 comprises a main power supply 31 and a magnetic bead 32, one end of the magnetic bead 32 is connected to the main power supply 31, and the other end outputs an isolated power supply; the isolated power supply and the main power supply 31 are both connected to the SLIC chip 2 to provide different power supplies; the ringing signal module 1 is connected to the SLIC chip 2 to provide a ringing signal and a feedback power supply; one end of the magnetic bead 32, which outputs the isolation power supply, is also connected in series with an electrolytic capacitor 6EC4 and then grounded, and the anode of the electrolytic capacitor 6EC4 is connected to the magnetic bead 32.

Foretell SLIC chip 2 is current module, and a plurality of integrated components and parts have, work through acquireing the power, current generally adopt same power directly to a plurality of integrated components and parts to supply power, but this scheme receives the undulant interference of power easily, this scheme is when supplying power, at first supply power to the power supply foot that voltage accuracy requires lowly through main power 31, isolation power after through the isolation supplies power to the power supply foot that the accuracy requires height, this isolation power exports after the magnetic bead 32 that flows through main power 31, keep apart through magnetic bead 32, it can suppress electromagnetic radiation interference through magnetic bead 32. Can also further carry out the filtering to the isolation power supply through electrolytic capacitor 6EC4, improve the stability of isolating the power supply, let SLIC chip 2 work more stable.

Above-mentioned ringing signal module 1 adopts SH54875, through above setting, can also let ringing signal module 1 and SLIC chip 2's cooperation more stable.

In further setting, a power supply pin of the ringing signal module 1 is connected in series with an inductor 6L2 and then connected to the main power supply 31, and one end of the inductor 6L2 connected with the power supply pin of the ringing signal module 1 is also connected with an electrolytic capacitor 6EC2 and then grounded; the positive electrode of the electrolytic capacitor 6EC2 is connected to the inductor 6L 2.

The current of the main power supply 31 enters the power supply pin of the ringing signal module 1 through the inductor 6L2, and at this time, because the current on the inductor does not jump, when the main power supply 31 fluctuates, the current on the inductor is still continuously and stably output to the power supply pin of the ringing signal module 1, and the electrolytic capacitor 6EC2 is matched to provide stable voltage to the power supply pin, so that the influence of the main power supply 31 on the ringing signal module 1 due to fluctuation can be reduced through the arrangement of the inductor.

In the scheme, the circuit further comprises a driving enhancement chip 4, two input ends of the driving enhancement chip 4 are connected to a control circuit 5, two output ends of the driving enhancement chip 4 are respectively connected to a clock pin and a transmission pin of the SLIC chip 2, and the driving enhancement chip 4 is a 75HC245 chip.

The 74HC245 chip is composed of multiple MOS tubes, and is provided with an output control pin and an output enable pin, the output and the input of the chip can be controlled through the two pins, the chip has higher anti-interference performance, and the false triggering is not easy to occur at ordinary times. Meanwhile, the MOS tube in the 74HC245 chip has an isolation function, which is equivalent to isolating the control circuit 5 and the SLIC chip 2 by the 74HC245 chip, and has a protection function. Through the effect of the isolation of the 74HC245 chip and the increase of the driving capability, the signals transmitted to the SLIC chip 2 can be more stable, and the anti-interference effect is better.

In addition, the scheme also comprises a point-to-point physical setting circuit 6, a real-time call circuit 7 and a video transmission circuit 8 which are electrically connected with the control circuit 5; the point-to-point physical setting circuit 6 comprises a display component 61 and a dial switch 62 which are electrically connected with the control circuit 5, and the dial of the dial switch 62 is used for being dialed by people; the control circuit 5 acquires the switch state of the dial switch 62 and arranges the switch state into a binary number value, and the control circuit 5 also converts the binary number value into a decimal numerical value and sends the decimal numerical value to the display component 61 for display; the control circuit 5 matches the target machine corresponding to the binary numerical value through the real-time call circuit 7 or the video transmission circuit 8; and after the matching is finished, communication connection is established, and communication interaction is carried out through the real-time call circuit 7 or the video transmission circuit 8.

At present, part of calls are communicated by selecting objects through software, but an emergency communication channel is not available, for example, when communication is needed, the software is jammed, communication is inconvenient for users, and an information transmission process may be delayed, so that the problem can be alleviated by providing a communication mode which can be used in an emergency. In the scheme, when communication software operated by a user is jammed and cannot be connected with other ports for a while, the dial of the dial switch 62 is dialed, a high-low level arrangement is formed by dialing a plurality of dials, at the moment, data received by the control circuit 5 is in a binary form, the data is arranged into the binary form and then converted into a decimal form by the control circuit 5, the decimal form is displayed on the display component 61, the display component 61 adopts the LCD1602, meanwhile, the control circuit 5 sends countdown data to the display component 61 for displaying, when countdown is finished, the control circuit 5 starts to match a corresponding target machine, and when the state of the dial switch 62 received by the control circuit 5 changes, the countdown is restarted.

Wherein, display module 61 is convenient for the user to look over current count-down condition and the target machine sequence number of selection, can assist the user to match, and the dial switch 62 that sets up is convenient for the user and directly selects through the position of setting for each dial-up, rather than adopting the keyboard, just records a digital form every time a button is pressed, and this scheme is compared and is adopted the button cost lower to it is more stable, adjusts the state of the plectrum of each position at any time. The real-time call circuit 7 and the video transmission circuit 8 are arranged to facilitate sending matched data, facilitate communication for users, and enable real-time telephone communication or video signal transmission.

Specifically, the control circuit 5 includes a main control circuit 51 and an auxiliary control circuit 52, the display module 61 and the dial switch 62 are electrically connected to the auxiliary control circuit 52, the auxiliary control circuit 52 is electrically connected to the main control circuit 51, and the real-time call circuit 7 and the video transmission circuit 8 are electrically connected to the main control circuit 51; the auxiliary control circuit 52 acquires the switch state of the dial switch 62 and sends the switch state to the display component 61 for displaying, and also sends the switch state to the main control circuit 51, and the main control circuit 51 matches the target machine corresponding to the switch state through the real-time call circuit 7 or the video transmission circuit 8; two input terminals of the drive enhancement chip 4 are connected to the main control circuit 51.

The auxiliary control circuit 52 and the main control circuit 51 share different works, functions of countdown and display are shared by the auxiliary control circuit 52, the main control circuit 51 continues data processing of itself, the auxiliary control circuit 52 only needs to adopt a low-cost single chip microcomputer, for example, an 8-bit single chip microcomputer of stm8, and two relatively independent single chip microcomputers can ensure stability and high efficiency of respective works; and binary system is converted into decimal system and is carried on in the auxiliary control circuit 52, count down go on in auxiliary control circuit 52 at this moment too, only when the count down of auxiliary control circuit 52 is over, will send the signal of the binary number value to the master control circuit 51, match after the master control circuit 51 receives this value, compare and send the value to the master control circuit 51 directly at every turn, this scheme has reduced the burden of the master control circuit 51, reduce its interference of working, avoid influencing efficiency.

In a further optimization, the secondary control circuit 52 sends a binary value to the primary control circuit 51 by means of an interrupt, the priority of which is the highest priority.

The dial toggle state of the dial switch 62 is sent to the secondary control circuit 52 via an interrupt, the interrupt priority being the highest priority.

In the above arrangement, the auxiliary control circuit 52 communicates with the main control circuit 51 in an interrupt manner, so that the effect is better during emergency processing and the connection establishment speed is faster. And the interrupt only transmits a string of binary values, so the interrupt execution is fast and stable. Likewise, the scheme can enable the response of the auxiliary control circuit 52 to be faster and the processing effect to be better.

The above scheme is suitable for the software dialing scheme, but the scheme of directly dialing through the telephone is not suitable.

In addition, the main control circuit 51 may also transmit a binary value through an optical fiber to match a target machine corresponding to the binary value.

Through optical fiber transmission, the speed is faster to each original circuit of make full use of light end machine communicates, does not need additionally to establish a data line.

The phase-locked loop circuit 9 comprises a 74HC4046 chip, the driving circuit 10 comprises a 74HC245 chip, and a main signal output end and a comparison signal output end of the main control circuit 51 are respectively and electrically connected with two signal input ends of the 74HC245 chip; the 74HC245 chip is electrically connected with a first signal input end and a second signal input end of the 74HC4046 chip respectively corresponding to two output ends of the main signal and the comparison signal; the output end of the 74HC4046 chip outputs a frequency-multiplied or frequency-divided signal.

When a user needs to carry out frequency multiplication or frequency division on a signal, the main control circuit 51 sends a main signal to the 74HC245 chip, at the moment, the 74HC245 chip carries out level conversion on the received signal, the driving capability of the original main signal is enhanced, the main signal is output to the input end of the 74HC4046 chip through the output end of the 74HC245 chip, and the main signal is output through the output end after frequency multiplication or frequency division, wherein the 74HC245 chip is composed of multiple MOS tubes and is provided with an output control pin and an output enable pin, the output and the input of the chip can be controlled through the two pins, the anti-interference performance is higher, and false triggering is not easy to occur at ordinary times. Meanwhile, the MOS tube in the 74HC245 chip has an isolation function, which is equivalent to the main control circuit 51 and the 74HC4046 chip being isolated by the 74HC245 chip, so that the main control circuit has a protection function. Through the isolation of the 74HC245 chip and the action of increasing the driving capability, the signals transmitted to the 74HC4046 chip can be more stable, and the anti-interference effect is better.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.