Microphone and operation method of audio input interface adaptive circuit

An adaptive circuit and audio input technology, which is applied in the direction of microphone mouth/microphone accessories, electrical components, signal processing, etc., can solve the problems of poor applicability and high processing cost, so as to improve product practicability and reduce the number of interfaces , the effect of reducing the volume of the product

Inactive Publication Date: 2019-10-15
上海诺为科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high processing cost and poor applicability of the existing adaptive earphone through the programmable control chip

Method used

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  • Microphone and operation method of audio input interface adaptive circuit
  • Microphone and operation method of audio input interface adaptive circuit
  • Microphone and operation method of audio input interface adaptive circuit

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0035] Refer to attached figure 1 - attached Figure 4 , the operation method of an adaptive circuit of a microphone and audio input interface in this embodiment, the interface module 700 is connected to the plug, the first terminal 710 and the fourth terminal 740 of the interface module 700 are connected to the resident in the bias power supply module 600 Pole body bias power supply-positive connection, the electret bias power supply applies a bias voltage to the first terminal 710 and the fourth terminal 740 to generate a logic control level, and the logic control level is filtered by the control voltage filter module 500 After removing the audio AC signal, it is input to the logic control pin of the dual four-choice CMOS analog switch chip of the integrated circuit module 200, and the dual four-choice CMOS analog switch chip of the integrated circuit module 200 recognizes the signal received by the logic control pin After judging, control the switches of four sets of IN pi...

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Abstract

The invention discloses a microphone and an operation method of an audio input interface self-adaptive circuit, and belongs to the technical field of audio and microphone input interfaces. The interface module is connected with the plug; a first terminal and a fourth terminal of the interface module are connected with a positive electrode of an electret bias power supply in the bias power supply module; the electret bias power supply applies bias voltage to the first terminal and the fourth terminal so as to generate logic control level. The logic control level controls the voltage filtering module to filter out audio alternating current signals, the signal is input into a logic control pin of the dual four-to-one CMOS analog switch chip of the integrated circuit module; and the dual four-to-one CMOS analog switch chip of the integrated circuit module performs identification and judgment on signals received by the logic control pins and then controls the switching of the four groups ofIN pins according to the signals so as to perform self-adaption of the microphone and the audio input interface.

Description

technical field [0001] The invention belongs to the technical field of audio and microphone input interfaces, and in particular relates to an operation method for an adaptive circuit of a microphone and an audio input interface. Background technique [0002] Many audio (audio) products, especially portable audio products, have audio input interfaces, including electret microphone input interfaces, stereo audio signal input interfaces, and the microphone on the phone's talkable headset is also an electret microphone input. interface. These interfaces are connected with 3.5mm plugs, which correspond to 3.5mm headphone jacks. Portable products are often difficult to be equipped with multiple interfaces at the same time due to structural size limitations, so the multiplexing of input interfaces is a more reasonable solution. [0003] The traditional headphone jack is used as the output interface, and adaptive multiplexing is also adopted. Use different impedance changes of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/08H04R3/12
CPCH04R1/08H04R3/12H04R2430/00
Inventor 黄永燕杨季昕
Owner 上海诺为科技有限公司
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