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Audio interface matching identification method and device for mobile terminal, and electronic signature tool

A mobile terminal and audio interface technology, applied in the field of electronics, can solve the problems such as the inability to establish communication between the electronic signature tool and the audio interface, the lack of external interfaces, and the smooth connection between the mobile terminal and the electronic signature tool.

Active Publication Date: 2012-10-17
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small size of the mobile terminal and very few external interfaces, how to realize the connection between the electronic signature tool and the mobile terminal has become an urgent problem to be solved
In particular, there are different types of audio interfaces in mobile terminals, which also creates obstacles for the smooth connection of mobile terminals with electronic signature tools
In particular, since the types of audio interfaces of mobile terminals are not uniform, if plugged into the audio interface of the mobile terminal, it may not be recognized, resulting in the failure to establish communication between the electronic signature tool and the audio interface

Method used

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  • Audio interface matching identification method and device for mobile terminal, and electronic signature tool
  • Audio interface matching identification method and device for mobile terminal, and electronic signature tool
  • Audio interface matching identification method and device for mobile terminal, and electronic signature tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] figure 1 It shows a schematic structural diagram of Embodiment 1 of the device embodiment 1 for audio interface matching recognition of a mobile terminal in the present invention, see figure 1 The device for matching and identifying the audio interface of the mobile terminal includes the audio interface, wherein:

[0051] The third pin of the audio interface is connected to the first pin through the first circuit; the third pin is also connected to the second pin through the circuit, wherein the third pin is a monophonic audio output pin or a multi-channel One of the audio output pins.

[0052] Wherein, the first circuit includes a first unidirectional conduction module, the second unidirectional circuit includes a second unidirectional conduction module, the current direction of the first unidirectional conduction module is to flow to the first pin, and the current of the second unidirectional conduction module The direction is to flow to the second pin; when the fir...

Embodiment 2

[0070] Figure 10 It shows a schematic diagram of embodiment 2 of the device embodiment 2 of the audio interface matching identification of the mobile terminal, see Figure 10 In this embodiment, the audio interface of the mobile terminal matches and identifies the device. The fourth pin of the audio interface is connected to the first pin through the third circuit; the fourth pin is also connected to the second pin through the fourth circuit block, wherein , the fourth pin is another one of the multi-channel audio output pins.

[0071] Wherein, the third circuit includes a third unidirectional conduction module, the fourth unidirectional circuit includes a fourth unidirectional conduction module, the current direction of the third unidirectional conduction module is to flow to the first pin, and the current of the fourth unidirectional conduction module The direction is to flow to the second pin; when the third one-way conduction module is turned on, the fourth pin and the f...

Embodiment 3

[0077] Figure 11 It shows a schematic diagram of embodiment 3 of the device embodiment 3 for matching and identifying the audio interface of the mobile terminal in the present invention, see Figure 11 The difference between this embodiment and Embodiment 1 is that the apparatus for matching and identifying an audio interface of a mobile terminal in this embodiment further includes a first matching circuit.

[0078] The third pin of the audio interface is respectively connected to the first circuit and the second circuit through the first matching circuit, wherein the third pin is a single-channel audio output pin or one of the multi-channel audio output pins ;

[0079] When the first unidirectional conduction module is turned on, the third pin forms a loop with the first pin, and the impedance value of the loop matches the identification resistance of the mobile terminal; when the second unidirectional conduction module is turned on, the third pin The pin and the second pi...

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PUM

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Abstract

The invention provides an audio interface matching identification method and an audio interface matching identification device for a mobile terminal, and an electronic signature tool. The method comprises the following steps: a third pin is connected with a first pin through a first circuit, and the first circuit comprises a first unidirectional switching-on module; the third pin is also connected with a second pin through a second circuit, and the second circuit comprises a second unidirectional switching-on module; the current of the first unidirectional switching-on module flows to the first pin, and the current of the second unidirectional switching-on module flows to the second pin; when the first unidirectional switching-on module is switched on, the third pin and the first pin forma return circuit, and the impedance of the return circuit is matched with the identification resistance of the mobile terminal; and when the second unidirectional switching-on module is switched on, the third pin and the second pin form a return circuit, and the impedance of the return circuit is matched with the identification resistance of the mobile terminal. By adopting the invention, the impedance of the return circuit formed by the audio output pin and the grounded pin is enabled to be matched with the identification resistance of the mobile terminal.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an audio interface matching identification method, device and electronic signature tool of a mobile terminal. Background technique [0002] The audio interface (such as a headphone jack) of an existing audio signal sending device (such as a mobile terminal) and the audio interface of an audio signal receiving device (such as a headset) generally use monophonic or multi-channel audio signal transmission, Generally, the third pin is used as a monophonic audio output pin, and the third pin and the fourth pin are generally used as multi-channel 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 the microphone pin MIC, the second pin is the ground pin GND, and the first pin is the ground pin GND. The second pin mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/38H04R3/00H04M1/72409
CPCH03H7/38H04R1/1091H04R29/001H04M1/72409H04R1/08H04R3/00H04R1/1025
Inventor 李东声
Owner TENDYRON CORP