Voice frequency interface self-adaptive device

An audio interface, self-adaptive technology, applied in the field of electronics, can solve problems such as inability to communicate with MIC pins

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 (for example, a mobile communication terminal) does not match the audio interface of the audio signal receiving device (for example, earphones, headsets), the audio signal sending device and the audio signal The receiving devices can not only communicate through the MIC pin of the audio interface, but also cannot use the audio pins (left channel pin and right channel pin) of the audio interface to transmit audio signals normally.

Method used

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  • Voice frequency interface self-adaptive device

Examples

Experimental program
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no. 1 example

[0202] figure 1 is a schematic structural diagram of the first embodiment of the audio interface adaptive device of the present invention; such as figure 1 As shown, the audio interface adaptive device in this embodiment includes: an audio interface, a first level comparison module, a second level comparison module, a transistor Tc, a power output VBAT, a switch module, and resistors R2a and R2b. in:

[0203] The first level comparison module includes a transistor Ta, and the second level comparison module includes a transistor Tb.

[0204] The triodes Ta and Tb are NPN-type triodes, and the triode Tc is a PNP-type triode.

[0205] The base (B) of the triode Ta is connected to the pin 4, the emitter stage (E) is connected to the pin 3, and the collector (C) is connected to the base (B) of the triode Tc through the resistor R2a.

[0206] In addition, the base (B) of the triode Ta and the pin 4 can be connected through a resistor R1a.

[0207] The base (B) of the transistor ...

no. 2 example

[0226] figure 2 is a schematic structural diagram of the second embodiment of the audio interface adaptive device of the present invention; such as figure 2 As shown, the difference between this embodiment and the first embodiment is only:

[0227] (1) Pins 1 and 2 of the audio interface are also connected to pins 3 and 2 of the audio interface through devices with unidirectional conduction characteristics (hereinafter referred to as unidirectional conductive devices, such as diodes, triodes, MOS tubes, etc.) Pin 4 is connected;

[0228] For example, as figure 2 As shown, pin 1 and pin 2 of the audio interface are respectively connected to pin 3 of the audio interface through a first signal processing module (eg, transformer U1), a second signal processing module (eg, resistor R3) and diode D1; Pin 1 and pin 2 of the audio interface are respectively connected to pin 4 of the audio interface through a first signal processing module (eg, transformer U1 ), a second signal p...

no. 3 example

[0233] image 3 is a schematic structural diagram of the third embodiment of the audio interface adaptive device of the present invention; such as image 3 As shown, the audio interface adaptive device in this embodiment includes an audio interface, a first level comparison module, a second level comparison module, a transistor Tc, a power output VBAT, a switch module, and resistors R2a and R2b. in:

[0234] The first level comparison module includes: a first reference voltage module H1 and a comparator C1.

[0235] Pin 3 is connected to the positive pole of the comparator C1; pin 4 is connected to the negative pole of the comparator C1 through the first reference voltage module H1, that is, the pin 4 is connected to the negative pole of the first reference voltage module H1, and the first reference voltage module H1 The positive pole of is connected to the negative pole of the comparator C1.

[0236] In this embodiment, the first reference voltage module H1 may be a power ...

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Abstract

The invention provides a voice frequency interface self-adaptive device. The voice frequency interface self-adaptive device comprises a voice frequency interface, a first electric level comparing module, a second electric level comparing module, a PNP (Plug N Play) triode, a power supply output end and a switch module, wherein the voice frequency interface comprises a pin 1, a pin 2, a pin 3 and a pin 4, one of the pin 3 and the pin 4 is an MIC pin of the voice frequency interface, and the other one of the pin 3 and the pin 4 is a ground wire pin; the switch module is used for connecting one of a first input pin B0L and a second input pin B1H with an output pin of the switch module according to the size of the electric level of a signal received by an input pin Se1; the pin 1 and/or the pin 2 of the voice frequency interface are/is used as (a) voice frequency pin(s); and one of the pin 3 and the pin 4 is used as the first pin, and the other one of the pin 3 and the pin 4 is used as the second pin. According to the voice frequency interface self-adaptive device provided by the invention, the automatic adaption of voice frequency signal sending equipments of different voice frequency interfaces can be realized, and the successful detection through the voice frequency signal sending equipments when the MIC pin of the voice frequency interface is detected can be realized.

Description

technical field [0001] The present invention relates to the field of electronic technology, and in particular, to an audio interface self-adapting device. 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 an audio interface of an audio signal receiving device (such as a headphone) generally use a four-segment interface, in which pin 1 and pin 1 are used. 2 is the audio pin, that is, the left channel pin and the right channel pin. However, the functions of pins 3 and 4 of different audio interfaces are different. There are pin 3 as MIC pin (microphone pin), pin 4 as GND pin (ground pin), and pin 3 It is a GND pin, and pin 4 is an audio interface of two types of MIC pins. [0003] Due to the existence of the above-mentioned different types of audio interfaces, when the audio interface of the audio signal transmitting device (eg, mobile communication terminal) d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R3/12H04R3/00H04R5/04H04R2201/107H04R2420/05
Inventor 李东声
Owner TENDYRON CORP
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