CN215072979U

CN215072979U - Single-chip hearing aid circuit

Info

Publication number: CN215072979U
Application number: CN202121529587.7U
Authority: CN
Inventors: 葛辛; 钱瀛恺; 樊晓华; 边海波
Original assignee: Jiangsu Jicui Intelligent Integrated Circuit Design Technology Research Institute Co ltd
Current assignee: Jiangsu Jicui Intelligent Integrated Circuit Design Technology Research Institute Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-12-07
Anticipated expiration: 2031-07-06

Abstract

A single-chip hearing aid circuit relates to the field of hearing aids. The microphone, the loudspeaker and the keys are respectively connected with the digital intelligent hearing aid chip. The microphone converts sound into an electric signal; the digital intelligent hearing aid chip carries out digital processing on the received electric signals, then carries out processing such as transformation, noise reduction, compression, feedback inhibition and the like on the digital signals, and finally converts the digital signals into audio signals; the loudspeaker restores the audio signal into sound; the keys are used to adjust the hearing aid operating parameters. The hearing aid circuit adopts an integrated circuit and a small number of peripheral devices, so that the circuit principle is simple, and the hearing aid circuit has the advantages of simplicity in operation and convenience in maintenance.

Description

Single-chip hearing aid circuit

Technical Field

The utility model relates to a audiphone field especially relates to a single-chip audiphone circuit.

Background

The hearing aids sold in the market mostly adopt more than two integrated circuits and a plurality of peripheral devices, the circuit principle is complex, the occupied area of the devices is large, and the processing difficulty is large.

SUMMERY OF THE UTILITY MODEL

In order to reduce circuit structure complicacy among the audiphone, peripheral components and parts are more, the great problem of the processing degree of difficulty, the utility model discloses a following technical scheme:

a single-chip hearing aid circuit comprises a direct-current power supply, a processing unit, a microphone M1, a loudspeaker M2 and keys, wherein the direct-current power supply is used for supplying power to the processing unit, and the microphone M1, the loudspeaker M2 and the keys are electrically connected with the processing unit respectively.

Specifically, the processing unit is a digital intelligent hearing aid chip U1 with model number JS 0820. The digital hearing aid chip can digitize the received electric signal, then transform, reduce noise, compress, feed back and restrain the digital signal, and finally convert the digital signal into audio signal. Therefore, the function of the hearing aid can be realized only by one digital intelligent hearing aid chip, the number of components in the circuit is reduced, the circuit content is simplified, the grounding is realized, and the safety is ensured.

Specifically, the output end of the microphone M1 is connected to the 5 pin of the digital intelligent hearing aid chip U1, the power supply end of the microphone M1 is connected to the power supply VCC, and the ground end of the microphone M1 is grounded. The microphone M1 is connected with the digital intelligent hearing aid chip U1, so that the sound is converted into an electric signal, and the electric signal is subjected to subsequent processing.

Specifically, two ends of the horn M2 are connected to

pins

12 and 13 of the digital smart hearing aid chip U1, respectively. The loudspeaker M2 is connected with the digital intelligent hearing aid chip U1, and the audio signal is restored into sound through the loudspeaker M2. The function of playing sound is realized.

Specifically, the keys include a key S1, a key S2, and a key S3; one end of the key S1 is connected with the 24 pins of the digital intelligent hearing aid chip U1, and the other end of the key S1 is grounded; one end of the key S2 is connected with a pin 7 and a pin 20 of the digital intelligent hearing aid chip U1, and the other end of the key S2 is grounded; one end of the key S3 is connected with the 19 pin and the 18 pin of the digital intelligent hearing aid chip U1, and the other end is grounded. The keys can be used for adjusting working parameters such as the hearing aid modes, the volume of the hearing aid and the like, and switching and adjusting of different modes and volumes are realized.

Specifically, the positive electrode of the dc power supply VBAT is connected to the 4 pin and the 15 pin of the digital intelligent hearing aid chip U1, and the negative electrode of the dc power supply is grounded.

The digital intelligent hearing aid chip U1 is internally provided with a booster circuit, generates a power supply VCC and outputs the VCC through a 2-pin of the digital intelligent hearing aid chip U1.

Specifically, be equipped with on the digital intelligent audiphone chip U1 and burn the mouth, burn and burn the mouth and include SDA end, SCL end, GND end, VCC end, SDA end with digital intelligent audiphone chip U1's 8 pins are connected, SCL end and digital intelligent audiphone chip U1's 9 pins, GND end ground, VCC end and power VCC are connected.

Specifically, the capacitor C1 and the capacitor C2 are further included; one end of the capacitor C1 is connected with the positive electrode VBAT of the direct-current power supply, and the other end is grounded; one end of the capacitor C2 is connected to the power source VCC, and the other end is grounded. Through the arrangement of the capacitor, the specific waveband frequency in the signal is filtered, and the interference of other signals is restrained and prevented.

The device has the following advantages: the hearing aid circuit adopts one integrated circuit and two external capacitor components for filtering, reduces the number of peripheral components, simplifies the circuit principle, realizes the functions of the hearing aid, and has the advantages of simple and safe operation, signal interference resistance and convenient maintenance.

Drawings

Fig. 1 is a schematic diagram of a single chip hearing aid circuit;

Detailed Description

The present invention will be further explained with reference to fig. 1.

A single chip hearing aid circuit comprises a direct current power supply, a processing unit, a microphone M1, a loudspeaker M2 and a key.

The processing unit is a JS0820 digital intelligent hearing aid chip U1. The digital intelligent hearing aid chip carries out digital processing on the received electric signals, then carries out time domain-frequency domain conversion, hearing loss compensation noise reduction, compression, feedback inhibition and other processing on the digital signals, and finally converts the digital signals into audio signals. The microphone M1 is mainly used to convert sound into an electrical signal. The output end of the microphone M1 is connected with the 5-pin of the digital intelligent hearing aid chip U1, the power supply end of the microphone M1 is connected with the power supply VCC, and the grounding end of the microphone M1 is grounded. The speaker reproduces the audio signal as sound. The two ends of the horn M2 are respectively connected with the 12 and 13 pins of the digital intelligent hearing aid chip U1. The keys are used to adjust the operating parameters of the hearing aid, such as the mode of the hearing aid and the volume of the hearing aid. Three keys including a key S1, a key S2 and a key S3; the key S1 is used for switching modes, the modes comprise different types such as a normal mode, a noise reduction mode, an indoor mode and the like, one end of the key S1 is connected with a 24 pin of the digital intelligent hearing aid chip U1, and the other end of the key S1 is grounded. The key S2 is used to reduce the volume, and one end of the key S2 is connected to the 7 pin and 20 pin of the digital intelligent hearing aid chip U1, and the other end is grounded. The key S3 is used for increasing the volume, one end of the key S3 is connected with the 19 pin and the 18 pin of the digital intelligent hearing aid chip U1, and the other end is grounded. The direct current power supply is 1.4V and is used for supplying power. The positive pole of the direct current power supply VBAT is connected with the 4 pins and the 15 pins of the digital intelligent hearing aid chip U1, and the negative pole of the direct current power supply is grounded. The intelligent hearing aid chip U1 is internally provided with a booster circuit, a power supply VCC is generated, the power supply VCC is output through 2 pins of the digital intelligent hearing aid chip U1, and the size of the power supply VCC is 3.3V. The digital intelligent hearing aid chip U1 is provided with a burning port, the burning port comprises an SDA end, an SCL end, a GND end and a VCC end, the SDA end is connected with an 8 pin of the digital intelligent hearing aid chip U1, the SCL end is connected with a 9 pin of the digital intelligent hearing aid chip U1, the GND end is grounded, and the VCC end is connected with a power VCC. In order to suppress power supply ripples and prevent interference of other signals, a circuit is provided with a capacitor to perform filtering processing. The size of the capacitor C1 and the capacitor C2 is 10 μ F. The capacitor C1 is used for filtering the direct-current power supply, one end of the capacitor C1 is connected with the positive electrode VBAT of the direct-current power supply, and the other end of the capacitor C1 is grounded; the capacitor C2 filters the power supply VCC, one end of the capacitor C2 is connected with the power supply VCC, and the other end is grounded.

As can be seen from the above description, the device has the following advantages: the hearing aid circuit adopts one integrated circuit and two external capacitor components for filtering, so that the number of peripheral components is reduced, the circuit principle is simple, the function of the hearing aid is realized, and the hearing aid circuit has the advantages of simplicity in operation and convenience in maintenance.

It should be understood that the above detailed description of the present invention is only for illustrative purposes and is not limited to the technical solutions described in the embodiments of the present invention. It will be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. The utility model provides a single-chip hearing aid circuit which characterized in that, includes DC power supply VBAT, processing unit, microphone M1, loudspeaker M2, button, DC power supply is used for right the processing unit power supply, microphone M1 loudspeaker M2 the button respectively with processing unit electric connection.

2. The single chip hearing aid circuit of claim 1, wherein the processing unit is a model JS0820 digital smart hearing aid chip U1.

3. The single chip hearing aid circuit of claim 2, wherein the output terminal of the microphone M1 is connected to the 5-pin of the digital smart hearing aid chip U1, the power terminal of the microphone M1 is connected to the power source VCC, and the ground terminal of the microphone M1 is connected to ground;

4. the single chip hearing aid circuit of claim 2, wherein two ends of the speaker M2 are connected to the 12 and 13 pins of the digital smart hearing aid chip U1;

5. the single chip hearing aid circuit of claim 2, wherein the keys comprise keys S1, S2, S3; one end of the key S1 is connected with the 24 pins of the digital intelligent hearing aid chip U1, and the other end of the key S1 is grounded; one end of the key S2 is connected with the pin 7 and the pin 20 of the digital intelligent hearing aid chip U1, and the other end of the key S2 is grounded; one end of the key S3 is connected with the 19 pins and the 18 pins of the digital intelligent hearing aid chip U1, and the other end is grounded.

6. The single chip hearing aid circuit of claim 2, wherein the positive terminal of the dc power supply VBAT is connected to the 4-pin, 15-pin terminal of the digital smart hearing aid chip U1, and the negative terminal of the dc power supply is connected to ground.

7. The single chip hearing aid circuit of claim 2, wherein the digital smart hearing aid chip U1 incorporates a boost circuit to generate a power VCC output via the 2 pin of the digital smart hearing aid chip U1.

8. The circuit of claim 2, wherein the digital hearing aid chip U1 is provided with a burning port, the burning port includes an SDA port, an SCL port, a GND port, and a VCC port, the SDA port is connected to the 8 pins of the digital hearing aid chip U1, the SCL port is connected to the 9 pins of the digital hearing aid chip U1, the GND port is connected to ground, and the VCC port is connected to a power VCC.

9. The single chip hearing aid circuit of claim 7 further comprising a capacitor C1 and a capacitor C2; one end of the capacitor C1 is connected with the positive electrode of the direct-current power supply VBAT, and the other end of the capacitor C1 is grounded; one end of the capacitor C2 is connected with the power supply VCC, and the other end of the capacitor C2 is grounded.