CN209264908U - AES exports observation circuit - Google Patents

Abstract

The utility model discloses a kind of AES to export observation circuit, it includes route drive module, monitoring modular and CPU module, the output end of the detected AES number conversion chip of the input terminal connection of the route drive module, first output end of route drive module connects pulse transformer module, the second output terminal of route drive module connects monitoring modular, and monitoring modular connects CPU module by I2C bus.The signal that AES number conversion chip exports is divided into two-way output by route drive module, the first via is normally output to pulse transformer module according to first original circuit, second tunnel is output to monitoring modular, the monitoring of signal condition is completed by monitoring modular, and CPU module is sent by monitoring result, to realize the monitoring process to signal.This programme is suitable for digital audio and video signals process field.

Description

AES exports observation circuit

Technical field

The utility model relates to digital audio and video signals process fields, more particularly, to one kind for detecting digital signal port AES export observation circuit.

Background technique

Digital audio and video signals are the important components of circuit signal, compared to analog signal have better anti-interference and Stability is suitble to current digital network environment convenient for encryption, storage and exchange.

AES/EBU(Audio Engineering Society/European Broadcast Union, audio engineer Association/European Broadcasting Union) be it is a kind of by based on single twisted-wire to come transmit digital audio-frequency data serial bit transmission association View has become the more popular standard of pro digital audio.A large amount of products for civilian use and professional audio digital device such as CD player, DAT, MD machine, digital sound console, Digital Audio Workstation etc. all support AES/EBU.AES signal can be up to without equilibrium 100m apart from transmitting data, if balanced, farther distance can be transmitted.

For the pro digital audio signal being converted to by AES number conversion chip, i.e. AES/EBU signal, we are not It can be directly merges into its output signal end as analog audio signal, realize port monitoring.But as switch, cent etc Equipment, and to the port of digital signal monitoring have demand, to solve the problems, such as that AES number conversion chip failure cannot be found, It and is that monitoring point is then more ideal closer to output port.

Summary of the invention

The utility model is mainly the monitoring means for solving shortage present in the prior art to AES digital audio and video signals Technical problem, provide one kind can be connected directly between on AES number conversion chip output port complete to AES digital audio and video signals The AES of monitoring exports observation circuit.

What the utility model was mainly addressed by following technical proposals in view of the above technical problems: a kind of AES is defeated The input terminal of observation circuit out, including route drive module, monitoring modular and CPU module, the route drive module connects quilt First output end of the output end of the AES number conversion chip of detection, route drive module connects pulse transformer module, route The second output terminal of drive module connects monitoring modular, and monitoring modular connects CPU module by I2C bus.

The signal that AES number conversion chip exports is divided into two-way output by route drive module, and the first via is according to original line Road is normally output to pulse transformer module, and the second tunnel is output to monitoring modular, and the monitoring of signal condition is completed by monitoring modular, And CPU module is sent by monitoring result, to realize the monitoring process to signal.CPU module uses STM32F207VCT6 core Piece is also possible to other 8 or 32 single-chip microcontrollers having I2C bus interface, such as STMF103 etc..

Preferably, the drive module includes driving chip U402, driving chip U402 is DS89C21 chip；Driving 7 feet of chip U402 pass through the end TXN of resistance R461 connection AES number conversion chip, and 8 feet of driving chip U402 pass through resistance 5 feet at the end TXP of R460 connection AES number conversion chip, driving chip U402 pass through resistance R463 connection pulse transformer First input end, 6 feet of driving chip U402 pass through the second input terminal of resistance R462 connection pulse transformer；Driving chip 1 foot of U402 connects power supply+5V, and capacitor B421 first end connects 1 foot of driving chip U402, the second termination of capacitor B421 Ground；The first end of the 2 feet connection resistance R465 of driving chip U402, resistance R465 second end connect monitoring modular；Driving chip The 2 of U402 pass through the first end of resistance R464 connection resistance R465, the 4 feet ground connection of driving chip U402.

Preferably, the monitoring modular includes monitoring chip U401, the monitoring chip U401 is CS8416；Monitor core 1 foot, 2 feet, 3 feet, 7 feet, 10 feet, 11 feet, 12 feet, 13 feet and 25 feet of piece U401 are all grounded；Monitor the 4 feet connection of chip U401 The first end of the first end of capacitor B436, the second end connection line drive module of capacitor B436, resistance R480 connects capacitor The second end of B436, the second end ground connection of resistance R480；5 feet of monitoring chip U401 are grounded by capacitor B435；Magnetic bead FB401 First end connect power supply+3.3V, 6 feet of the second end connection monitoring chip U401 of magnetic bead FB401, capacitor B427 and capacitor 6 feet of one end ground connection other end monitoring chip U401 after B426 is in parallel；8 feet of monitoring chip U401 are connect by capacitor B424 It is in parallel with capacitor B424 after ground, resistance R467 and capacitor B425 series connection；9 feet of monitoring chip U401 are connected by resistance R466 Power supply+3.3V, 9 feet of monitoring chip U401 also pass through capacitor B423 and are grounded；Monitor 14 feet, 15 feet, 24 feet, 27 of chip U401 Foot and 28 feet respectively pass through a resistance eutral grounding；16 feet, 17 feet, 18 feet and 26 feet of monitoring chip U401 respectively pass through a resistance and connect Power supply+3.3V is met, 16 feet and 17 feet for monitoring chip pass through I2C bus connection CPU module；21 feet of monitoring chip U401 pass through Capacitor B428 ground connection, 23 feet of monitoring chip U401 connect power supply+3.3V and connect with 21 feet, capacitor B430 and capacitor B429 23 feet of one end ground connection other end connection monitoring chip U401 after in parallel.

DS89C21 chip handles the differential pair of digital audio and video signals for single-ended signal, the single-ended signal handled, and one Aspect gives driving chip included that group of differential pair output, then as the loop delivery outlet of chip, the number needed as output Word tone frequency differential pair signal；Obtained single-ended signal is handled, while giving the monitoring chip CS8416 of digital audio and video signals, by The signal condition of CS8416 detection digital audio and video signals.

CPU reads the buffer status of CS8416 digit chip by I2C bus, the digital audio and video signals monitored State, to realize that the back production to port digital signal monitors.

Preferably, AES output observation circuit further includes warning circuit, the warning circuit includes LED and/or buzzing Device, LED and/buzzer are connect with CPU module.CPU module carries out fault cues according to obtained state, by warning circuit.

The utility model bring beneficial effect is that may be implemented to the monitoring of AES digital audio and video signals, solves AES Digital conversion chip failure is difficult to the problem of finding in time, and structure is simple, and accuracy in detection is high.

Detailed description of the invention

Fig. 1 is a kind of structural block diagram of the utility model；

Fig. 2 is a kind of route drive module and monitoring modular circuit diagram of the utility model；

In figure: 1, route drive module；2, monitoring modular；3, CPU module；4, AES number conversion chip；5, pulse transforming Device.

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

Embodiment: a kind of AES of the present embodiment exports observation circuit, as shown in Figure 1, including route drive module 1, monitoring Module 2 and CPU module 3, the detected AES number conversion chip 4(of the input terminal connection of the route drive module is for example The chips such as CS8402) output end, the first output end of route drive module connects pulse transformer 5, route drive module Second output terminal connects monitoring modular, and monitoring modular connects CPU module by I2C bus.

The signal that AES number conversion chip exports is divided into two-way output by route drive module, and the first via is according to original line Road is normally output to pulse transformer module, and the second tunnel is output to monitoring modular, and the monitoring of signal condition is completed by monitoring modular, And CPU module is sent by monitoring result, to realize the monitoring process to signal.CPU module uses STM32F207VCT6 core Piece is also possible to other 8 or 32 single-chip microcontrollers having I2C bus interface, such as STMF103 etc..

As shown in Fig. 2, drive module includes driving chip U402, driving chip U402 is DS89C21 chip；Driving chip 7 feet of U402 pass through the end TXN of resistance R461 connection AES number conversion chip, and 8 feet of driving chip U402 pass through resistance R460 The end TXP of AES number conversion chip is connected, 5 feet of driving chip U402 pass through the first of resistance R463 connection pulse transformer Input terminal, 6 feet of driving chip U402 pass through the second input terminal of resistance R462 connection pulse transformer；Driving chip U402's 1 foot connects power supply+5V, and capacitor B421 first end connects 1 foot of driving chip U402, the second end ground connection of capacitor B421；Driving The first end of the 2 feet connection resistance R465 of chip U402, resistance R465 second end connect monitoring modular；The 2 of driving chip U402 By the first end of resistance R464 connection resistance R465,4 feet of driving chip U402 are grounded.

Monitoring modular includes monitoring chip U401, and the monitoring chip U401 is CS8416；1 foot of monitoring chip U401,2 Foot, 3 feet, 7 feet, 10 feet, 11 feet, 12 feet, 13 feet and 25 feet are all grounded；Monitor the of the 4 feet connection capacitor B436 of chip U401 One end, the second end connection line drive module of capacitor B436, the second end of the first end connection capacitor B436 of resistance R480, electricity Hinder the second end ground connection of R480；5 feet of monitoring chip U401 are grounded by capacitor B435；The first end of magnetic bead FB401 connects electricity 6 feet of the second end connection monitoring chip U401 of source+3.3V, magnetic bead FB401, capacitor B427 and the one end later in parallel capacitor B426 It is grounded 6 feet of other end monitoring chip U401；8 feet of monitoring chip U401 are grounded by capacitor B424, resistance R467 and capacitor It is in parallel with capacitor B424 after B425 series connection；9 feet of chip U401 are monitored by resistance R466 connection power supply+3.3V, monitor core 9 feet of piece U401 also pass through capacitor B423 and are grounded；14 feet, 15 feet, 24 feet, 27 feet and 28 feet of monitoring chip U401 respectively pass through one A resistance eutral grounding；16 feet, 17 feet, 18 feet and 26 feet of monitoring chip U401 respectively pass through a resistance connection power supply+3.3V, monitoring 16 feet and 17 feet of chip connect CPU module by I2C bus；21 feet of monitoring chip U401 are grounded by capacitor B428, are supervised It surveys the 23 feet connection power supply+3.3V of chip U401 and is connect with 21 feet, capacitor B430 and a capacitor B429 termination later in parallel 23 feet of ground other end connection monitoring chip U401.

DS89C21 chip handles the differential pair of digital audio and video signals for single-ended signal, the single-ended signal handled, and one Aspect gives driving chip included that group of differential pair output, then as the loop delivery outlet of chip, the number needed as output Word tone frequency differential pair signal；Obtained single-ended signal is handled, while giving the monitoring chip CS8416 of digital audio and video signals, by The signal condition of CS8416 detection digital audio and video signals.

CPU reads the buffer status of CS8416 digit chip by I2C bus, the digital audio and video signals monitored State, to realize that the back production to port digital signal monitors.

Further, AES, which exports observation circuit, to include warning circuit, and the warning circuit includes LED and/or bee Ring device, and LED and/buzzer are connect with CPU module.CPU module carries out failure by warning circuit and mentions according to obtained state Show.

Specific embodiment described herein is only to give an example to the inventive spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the principles of the present invention or beyond the scope of the appended claims.

Although the terms such as route drive module, monitoring modular are used more herein, it is not precluded and uses other arts A possibility that language.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；They are solved Being interpreted into any additional limitation is disagreed with the inventive spirit of the present invention.

Claims (4)

1. a kind of AES exports observation circuit, which is characterized in that described including route drive module, monitoring modular and CPU module The output end of the detected AES number conversion chip of the input terminal connection of route drive module, the first of route drive module are defeated Outlet connects pulse transformer, and the second output terminal of route drive module connects monitoring modular, and monitoring modular is connected by I2C bus Connect CPU module.

2. AES according to claim 1 exports observation circuit, which is characterized in that the route drive module includes driving Chip U402, driving chip U402 are DS89C21 chip；7 feet of driving chip U402 are turned by resistance R461 connection AES number The end TXN of chip is changed, 8 feet of driving chip U402 pass through the end TXP of resistance R460 connection AES number conversion chip, drive core 5 feet of piece U402 pass through the first input end of resistance R463 connection pulse transformer, and 6 feet of driving chip U402 pass through resistance Second input terminal of R462 connection pulse transformer；1 foot of driving chip U402 connects power supply+5V, and capacitor B421 first end connects Connect 1 foot of driving chip U402, the second end ground connection of capacitor B421；The first of the 2 feet connection resistance R465 of driving chip U402 End, resistance R465 second end connect monitoring modular；The 2 of driving chip U402 pass through the first of resistance R464 connection resistance R465 End, the 4 feet ground connection of driving chip U402.

3. AES according to claim 1 or 2 exports observation circuit, which is characterized in that the monitoring modular includes monitoring core Piece U401, the monitoring chip U401 are CS8416；Monitor 1 foot of chip U401,2 feet, 3 feet, 7 feet, 10 feet, 11 feet, 12 feet, 13 feet and 25 feet are all grounded；Monitor the first end of the 4 feet connection capacitor B436 of chip U401, the second end connecting line of capacitor B436 Road drive module, the second end of the first end connection capacitor B436 of resistance R480, the second end ground connection of resistance R480；Monitor chip 5 feet of U401 are grounded by capacitor B435；The first end of magnetic bead FB401 connects power supply+3.3V, and the second end of magnetic bead FB401 connects 6 feet of monitoring chip U401 are connect, capacitor B427 and the capacitor B426 ground connection other end of one end later in parallel monitor the 6 of chip U401 Foot；8 feet of monitoring chip U401 are grounded by capacitor B424, and resistance R467 and capacitor B425 connect later and capacitor B424 simultaneously Connection；9 feet of chip U401 are monitored by resistance R466 connection power supply+3.3V, 9 feet of monitoring chip U401 also pass through capacitor B423 Ground connection；14 feet, 15 feet, 24 feet, 27 feet and 28 feet of monitoring chip U401 respectively pass through a resistance eutral grounding；Monitor chip U401's 16 feet, 17 feet, 18 feet and 26 feet respectively pass through a resistance connection power supply+3.3V, and 16 feet and 17 feet for monitoring chip are total by I2C Line connects CPU module；Monitoring chip U401 21 feet be grounded by capacitor B428, monitor chip U401 23 feet connect power supply+ It 3.3V and is connect with 21 feet, one end ground connection other end, which connect, after capacitor B430 is in parallel with capacitor B429 monitors chip U401's 23 feet.

4. AES according to claim 1 or 2 exports observation circuit, which is characterized in that it further include warning circuit, the report Alert circuit includes LED and/or buzzer, and LED and/buzzer are connect with CPU module.