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Self-adaptive method and self-adaptive device of voice frequency interface, and electronic signature tool

An audio interface and self-adaptive technology, which is applied in the electronic field, can solve the problem that the audio signal sending device and the audio signal receiving device cannot communicate normally, and achieve the effect of low cost

Active Publication Date: 2012-10-31
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the above-mentioned different types of audio interfaces, when the audio interface of the audio signal sending device is not connected to the ground pin of the audio interface of the audio signal receiving device, the audio signal sending device and the audio signal receiving device cannot communicate normally

Method used

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  • Self-adaptive method and self-adaptive device of voice frequency interface, and electronic signature tool
  • Self-adaptive method and self-adaptive device of voice frequency interface, and electronic signature tool
  • Self-adaptive method and self-adaptive device of voice frequency interface, and electronic signature tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 1 Shows a flow chart of the audio interface adaptation method, see figure 1 , the method includes the following steps:

[0045] Step S101, judging that the absolute value of the voltage difference between the first pin and the second pin is less than or equal to the first threshold, then the identification operation of the first pin and the second pin of the audio interface is not performed;

[0046] Step S102, judging that the absolute value of the voltage difference between the first pin and the second pin is greater than or equal to the second threshold, then judging the type of the first pin and the second pin of the audio interface according to the positive or negative of the voltage difference;

[0047] Wherein, the second threshold is greater than or equal to the first threshold; specifically, the value range of the first threshold is generally 0-1V; preferably, the value range of the first threshold is generally 0.4-0.6V, further, the first threshold is ...

Embodiment 2

[0064] figure 2 A schematic diagram of Embodiment 2 of the audio interface adaptive device is shown, see figure 2 , an audio interface adaptive device, including a judgment module and a switch module; wherein:

[0065] A judging module, configured to not perform an identification operation on the first pin and the second pin of the audio interface when judging that the absolute value of the voltage difference between the first pin and the second pin is less than or equal to the first threshold; When the absolute value of the voltage difference between the first pin and the second pin is greater than or equal to the second threshold, the type of the first pin and the second pin of the audio interface is determined by the positive or negative of the voltage difference; wherein, the second threshold greater than or equal to the first threshold; when it is judged that the absolute value of the voltage difference is greater than or equal to the second threshold, and the voltage ...

Embodiment 3

[0073] On the basis of embodiment 2, image 3 A schematic diagram of Embodiment 3 of the audio interface adaptive device is shown, see image 3 , the audio interface adaptive device may also include a measurement module, the measurement module is used to directly measure the voltage difference between the first pin and the second pin; or respectively measure the voltage difference between the first pin and the second pin relative to the reference voltage The voltage value is calculated by calculating the difference between the measured voltage values, and the measurement result is sent to the judging device to judge the type of the audio interface, so that the switch module connects the judged ground pin to the common ground.

[0074] Certainly, in this embodiment, the measurement module may also include a first measurement module and a second measurement module, which are used to respectively measure the voltage values ​​of the first pin and the second pin.

[0075] Certainl...

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Abstract

The invention provides a self-adaptive method, a self-adaptive device of a voice frequency interface, and an electronic signature tool. The self-adaptive method comprises the following steps of: not performing an identification operation for a first pin and a second pin of the voice frequency interface when an absolute value of a voltage difference between the first pin and the second pin is judged to be less than or equal to a first threshold value; judging the types of the first pin and the second pin of the voice frequency interface through the plus-minus value of the voltage difference when the absolute value of the voltage difference between the first pin and the second pin is larger than or equal to a second threshold value; determining that the second threshold value is larger thanor equal to the first threshold value; judging whether the first pin is used as a microphone pipe and the second pin as a ground pin when the absolute value of the voltage difference is larger than or equal to the second threshold value, if so, determining that the first pin is used as the ground pin and the second pin as the microphone pin; and connecting the identified ground pin with a public ground. According to the invention, the detected ground pin is connected with the public ground of voice frequency signal receiving equipment, and thus the normal communication between voice frequencysignal sending equipment and the voice frequency signal receiving equipment through the voice frequency interface can be ensured.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an audio interface adaptive method, device and electronic signature tool. Background technique [0002] The audio interface (such as a headphone jack) of an existing audio signal sending device (such as a mobile communication terminal) and the audio signal receiving device (such as an electronic signature tool, an audio signal conversion device, and other audio output pins receive and The audio interface of an audio signal receiving device that processes audio signals generally adopts a four-segment interface, wherein the third pin and the fourth pin are audio output pins, that is, the left channel pin and the right channel pin. However, the functions of the first pin and the second pin of different audio interfaces are different. There is a case where the first pin is a microphone pin MIC, the second pin is a ground pin GND, and the first pin is a ground pin GND, the second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R1/10H04R3/00H04R5/04H04R2420/05H04R3/002
Inventor 李东声
Owner TENDYRON CORP
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