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Switching device, electronic signing tool, detection device and interface detection system

A technology for switching devices and detecting interfaces, which is applied in the electronic field and can solve problems such as socket mismatch and non-existence, and achieve the effects of simple and convenient detection, guaranteed signal transmission quality, and improved functions and scope of use

Active Publication Date: 2013-01-16
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the wire sequence of the microphone pin and the ground pin are different in the audio plug, different types of audio plugs may not match the sockets of the electronic equipment. Audio plugs to be tested by testing devices to distinguish types

Method used

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  • Switching device, electronic signing tool, detection device and interface detection system
  • Switching device, electronic signing tool, detection device and interface detection system
  • Switching device, electronic signing tool, detection device and interface detection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 It is the audio signal switching device of the present invention, see figure 1 , The audio signal conversion device includes: a first interface, a second interface, an audio signal amplifying circuit 11 and an impedance circuit 12 .

[0041]Wherein, the first interface includes an audio signal receiving pin IN1, a ground pin GND1 and a microphone pin MIC, wherein the audio signal receiving pin IN1 is a monophonic pin in a monophonic audio plug, or a stereo audio plug One of the left or right channel pins in the Since the positions of the ground pin GND1 and the microphone pin MIC have not been determined temporarily, the ground pin GND1 and the microphone pin MIC are interchangeable in the following descriptions. For the convenience of description, in this embodiment and other embodiments, all refer to figure 1 The positions of the ground pin GND1 and the microphone pin MIC are described in , which should not be understood as a limitation of the present inven...

Embodiment 2

[0047] figure 2 is a structural schematic diagram of the audio signal switching device of the present invention, see figure 2 The difference between this embodiment and Embodiment 1 is that the second interface shown in Embodiment 1 may further include an audio signal input pin IN2. figure 2 The same parts as those in Example 1 have been given the same reference numerals. At the same time, the same numbering rules are also adopted for the following other embodiments.

[0048] Specifically, the audio signal conversion device further includes: a first circuit 13 and a second circuit 14 .

[0049] Wherein, the first circuit 13 is coupled between the microphone pin MIC and the audio signal input pin IN2, the second circuit 14 is coupled between the ground pin GND1 and the audio signal input pin IN2, the first circuit 13 and the second The two circuits 14 are mutually attenuating circuits.

[0050] In addition, the first circuit 13 uses a filter circuit or a voltage divider ...

Embodiment 3

[0060] The audio signal amplifying circuit 11 mentioned in Embodiment 1 may include: a transformer, a resistor connected in parallel with an operational amplifier, an inductor connected in parallel with an operational amplifier, a resistor connected in parallel with a comparator, or an inductor connected in parallel with a comparator, etc.

[0061] The present invention will be described below by taking the transformer 11 as an example to amplify audio signals. refer to Figure 4 , the primary coil of the transformer 11 is connected to the audio signal receiving pin IN1 and the ground pin GND1, and the secondary coil of the transformer 11 is connected to the audio signal output pin OUT.

[0062] Since the transformer 11 is a passive device, it does not consume any power during operation.

[0063] In addition, using the transformer 11 to amplify the audio signal also solves the problem of common mode between interfaces of different devices.

[0064] The use of transformers fo...

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Abstract

The invention provides an audio signal switching device. The device comprises a first interface, a second interface, an audio signal amplification circuit and an impedance circuit; the first interface comprises an audio signal receiving pin, a microphone pin and a ground pin; the second interface comprises an audio signal output pin; the audio signal amplification circuit is used for amplifying an audio signal received by the audio signal receiving pin and outputting the audio signal to the audio signal output pin; the audio signal received by the audio signal receiving pin flows to the microphone pin or the ground pin by an impedance equivalent part of the audio signal amplification circuit; and the impedance circuit is coupled between the microphone pin and the ground pin. According to the audio signal switching device disclosed by the invention, a line sequence of the microphone pin and the ground pin of an audio plug of the switching device can be detected whether to be the same with a line sequence of a detection. The invention also provides an electronic signing tool, the detection device and an interface detection system of the audio signal switching device.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an audio signal transfer device, a detection device, an electronic signature tool with the audio signal transfer device and an interface detection system for the audio signal transfer device. Background technique [0002] In the prior art, there are two types of four-segment earphones. One is the earphone with the pin line sequence of the earphone plug as follows: channel output pins (left channel, right channel), microphone pin and ground pin. , the other is the headphone plug whose pin order is: channel output pin (left channel, right channel), ground pin and microphone pin. The channel output pin of the earphone plug of the three-section earphone is mono, and the wiring sequence of the microphone pin and the ground pin is also divided into the above two types. Because the wire sequence of the microphone pin and the ground pin are different in the audio plug, different typ...

Claims

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Application Information

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IPC IPC(8): H04R29/00G01R31/00
CPCH04R3/007H04R29/00H04R1/08H04R3/00
Inventor 李东声
Owner TENDYRON CORP
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