CN216930323U

CN216930323U - Audio decoding deck circuit system

Info

Publication number: CN216930323U
Application number: CN202220086148.1U
Authority: CN
Inventors: 尚俊凯; 依楠; 何国强; 颜建国; 肖春鹏
Original assignee: Hunan Hemoni Technology Co ltd
Current assignee: Hunan Hemoni Technology Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-07-08
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses an audio decoding board circuit system, which belongs to the technical field of audio decoding and comprises a Mic interface module, a Mic signal conditioning module, a power amplifier module, a decoding module, a power supply module and a system clock module, wherein the power supply module is respectively connected with the Mic interface module, the Mic signal conditioning module, the decoding module and the power amplifier module; the utility model increases Mic support from a test path to 4 paths and PDM signals, reduces the complexity of the system and reduces the cost.

Description

Audio decoding deck circuit system

Technical Field

The utility model relates to the technical field of audio decoding, in particular to an audio decoding board circuit system.

Background

The existing Mic decoding circuit mainly has two types, the first type is a self-contained function in an embedded system, and if the Mic decoding circuit is used for a Mic test system, the complexity and the redundancy of the test system can be increased, and the test time and the test cost can be increased; the second is the existing general Mic decoding board on the market, most of the existing Mic decoding board does not contain the signal processing of PDM digital Mic, the Mic frequency response does not exceed 10k, or the channel does not exceed 2 paths, and if 3Mic or more Mic tests are used, the cost and the complexity of the test system are increased.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an audio decoding board circuit system to solve the above problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an audio decoding deck circuit system, includes Mic interface module, Mic signal conditioning module, power amplifier module, decoding module, power module and system clock module, power module connects Mic interface module, Mic signal conditioning module, decoding module and power amplifier module respectively, and Mic signal conditioning module's input is connected with Mic interface module's output, and Mic signal conditioning module's output is connected decoding module's input, and decoding module's output is connected power amplifier module's input, and system clock module connects Mic signal conditioning module, decoding module and power amplifier module respectively.

As a further technical scheme of the utility model: the power amplifier further comprises a reset module, and the reset module is respectively connected with the system clock module, the power amplifier module and the power module.

As a further technical scheme of the utility model: the Mic interface module simultaneously supports 4 paths of Mics; PDM signals are uniformly converted into 3.3V signals through an SN74AVC6T622PWR chip, and then the signals are input into a decoding chip after being sorted by an LT6232 operational amplifier chip.

As a further technical scheme of the utility model: the Mic signal conditioning module converts the PDM signal into a PCM signal by adopting ADAU 7002.

As a further technical scheme of the utility model: the decoding module adopts a PCM1794A chip.

As a further technical scheme of the utility model: the power amplification module adopts an operational amplifier chip OPA1632 as an amplification chip.

As a further technical scheme of the utility model: the power supply module comprises a chip U600, an inductor L600, a capacitor C601, a capacitor C602, a capacitor C603, a capacitor C604, a resistor R600 and a resistor R602, wherein a pin 1 of the chip U600 is connected with the capacitor C604, the resistor R600, an anode of a diode D601 and the capacitor C605, a pin 5 of the chip U600 is connected with the capacitor C601, the capacitor C602, the capacitor C603, the resistor R602, a pin 6 of the chip U600, a pin 7 of the chip U600, a pin 8 of the chip U600 and a fuse FB600, a pin 10 of the chip U600 is connected with the other end of the capacitor C604, the other end of the resistor R600 and the resistor R603, the other end of the capacitor C601 is grounded, the other end of the capacitor C602 is grounded, the other end of the resistor R603 is grounded, the other end of the diode D601 is connected with the resistor R604, the other end of the resistor R604 is grounded, the other end of the capacitor C605 is grounded, and a pin 2 and a pin 4 of the chip U600 are respectively connected with two ends of the inductor L600.

As a further technical scheme of the utility model: the diode D601 is a light emitting diode.

As a further technical scheme of the utility model: the power module provides 5V, 3.3V, 2.5V and 1.8V power for the system, and supplies 5V/1A power supply current to the maximum.

As a further technical scheme of the utility model: the model of the chip U600 is RT 6150.

Compared with the prior art, the utility model has the beneficial effects that: aiming at the Mic test system, the utility model can directly respond to the Mic test requirement, thereby getting rid of the system redundancy and long test time of the embedded system and reducing the test cost; the utility model increases Mic support from a test path to 4 paths and PDM signals, reduces the complexity of the system and reduces the cost.

Drawings

FIG. 1 is a block diagram of the present invention.

Fig. 2 is a circuit diagram of a power supply module.

Fig. 3 is a circuit diagram of the Mic interface module and the input signal conditioning module.

Fig. 4 is a circuit diagram of a decoding module.

Fig. 5 is a circuit diagram of a power amplifier module.

Detailed Description

Example 1

Referring to fig. 1-5, an audio decoder board circuit system includes:

the power supply module is used for providing 5V, 3.3V, 2.5V and 1.8V power supplies for the system and providing 5V/1A power supply current to the maximum; the ripple waves and the load carrying capacity can be better controlled by converting 5V into 3.3V and adopting RT 6150; LDK220 is adopted at 2.5V and 1.8V, and corresponding voltages can be output by adjusting different ADJ gears;

the Mic interface module is used for driving Mic, providing power supply and clock signals for Mic, and can simultaneously support 4 paths of Mic at most; PDM signals are uniformly converted into 3.3V signals through SN74AVC6T622PWR, so that the subsequent circuit processing is facilitated; the analog signal circuit is processed by an LT6232 operational amplifier chip and then input into a decoding chip;

the Mic signal conditioning module is used for uniformly converting the input Mic signals into PCM signals to be input into the next stage, so that the Mic signals are convenient to process; adopting ADAU7002 to convert the PDM signal into a PCM signal;

the decoding module is used for converting the PCM signal of the previous stage into an analog signal and outputting the analog signal; with the PCM1794A of TI company, the PCM1794A device provides balanced current output, and allows a user to optimize the simulation performance from the outside, and the sampling rate of 200kHz is supported at most;

the power amplification module is used for increasing the analog signal of the previous stage to drive the earphone; a high-precision operational amplifier chip OPA1632 is used as an amplifying chip, so that the input high fidelity, the dynamic response and the optimal output of the signal-to-noise ratio of the Mic signal are ensured;

the system clock module is used for providing a clock for the whole set of system and comprises a decoding module and an Mic driving clock of an Mic interface module; it can realize 10 kinds of clock outputs of 768KHZ/1.024MHZ/1.536MHZ/2.048MHZ/2.4MHZ/2.822MHZ/3.072MHZ/4.096MHZ/4.8MHZ/NON NE.

Example 2

Based on embodiment 1, as shown in fig. 2, the power module includes a chip U600, an inductor L600, a capacitor C601, a capacitor C602, a capacitor C603, a capacitor C604, a resistor R600, and a resistor R602, pin 1 of the chip U600 is connected to the capacitor C604, the resistor R600, an anode of the diode D601, and the capacitor C605, pin 5 of the chip U600 is connected to the capacitor C601, the capacitor C602, the capacitor C603, the resistor R602, pin 6 of the chip U600, pin 7 of the chip U600, pin 8 of the chip U600, and the fuse FB600, pin 10 of the chip U600 is connected to the other end of the capacitor C604, the other end of the resistor R600, and the resistor R603, the other end of the capacitor C601 is grounded, the other end of the capacitor C602 is grounded, the other end of the resistor R603 is grounded, the other end of the diode D601 is connected to the resistor R604, the other end of the resistor R604 is grounded, and the other end of the capacitor C605 is grounded, and pin 2 and pin 4 of the chip U600 are connected to both ends of the inductor L600. Wherein, the diode D601 is a light emitting diode.

Claims

1. The utility model provides an audio decoding board circuit system, includes Mic interface module, Mic signal conditioning module, power amplifier module, decoding module, power module and system clock module, its characterized in that, power module connects Mic interface module, Mic signal conditioning module, decoding module and power amplifier module respectively, Mic signal conditioning module's input is connected with Mic interface module's output, Mic signal conditioning module's output is connected decoding module's input, decoding module's output is connected power amplifier module's input, system clock module connects Mic signal conditioning module, decoding module and power amplifier module respectively.

2. The circuit system of claim 1, further comprising a reset module, wherein the reset module is connected to the system clock module, the power amplifier module and the power supply module respectively.

3. The audio decoder board circuitry of claim 1, wherein said Mic interface module supports 4 Mic simultaneously; PDM signals are uniformly converted into 3.3V signals through an SN74AVC6T622PWR chip, and then the signals are input into a decoding chip after being sorted by an LT6232 operational amplifier chip.

4. The audio decoding board circuitry of claim 1, wherein the Mic signal conditioning module uses ADAU7002 to convert the PDM signal into the PCM signal.

5. The audio decoder board circuitry of claim 1, wherein said decoder module is implemented using a PCM1794A chip.

6. The audio decoding board circuit system of claim 1, wherein the power amplifier module uses an operational amplifier chip OPA1632 as an amplifier chip.

7. The audio decoder board circuit system of claim 6, wherein said power module comprises a chip U600, an inductor L600, a capacitor C601, a capacitor C602, a capacitor C603, a capacitor C604, a resistor R600 and a resistor R602, wherein pin 1 of the chip U600 is connected with the capacitor C604 and the resistor R600, the anode of the diode D601 and the capacitor C605, the pin 5 of the chip U600 is connected with the capacitor C601, the capacitor C602, the capacitor C603, the resistor R602, the pin 6 of the chip U600, the pin 7 of the chip U600, the pin 8 of the chip U600 and the fuse FB600, the pin 10 of the chip U600 is connected with the other end of the capacitor C604, the other end of the resistor R600 and the resistor R603, the other end of the capacitor C601 is grounded, the other end of the capacitor C602 is grounded, the other end of the resistor R603 is grounded, the other end of the diode D601 is connected with the resistor R604, the other end of the resistor R604 is grounded, the other end of the capacitor C605 is grounded, and the pin 2 and the pin 4 of the chip U600 are respectively connected with the two ends of the inductor L600.

8. The audio decoder board circuitry of claim 7, wherein said diode D601 is a light emitting diode.

9. The audio decoder board circuitry of claim 7, wherein said power supply module provides 5V, 3.3V, 2.5V and 1.8V power to the system, providing a maximum of 5V/1A supply current.

10. The audio decoding board circuit system of claim 7, wherein the model of said chip U600 is RT 6150.