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Automatic analog signal output/input distinguishing device and method

An analog signal, automatic technology, applied in the direction of hardware monitoring, etc., can solve the problems of increasing the available space and reducing the volume of notebook computers

Inactive Publication Date: 2004-06-23
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The output and input of the analog signal need a voice socket respectively, which will be a big limitation for the size reduction of the notebook computer (NB)
If the number of voice sockets can be reduced, the available space of the notebook computer can be increased, and the notebook computer (NB) can be reduced in size.

Method used

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  • Automatic analog signal output/input distinguishing device and method
  • Automatic analog signal output/input distinguishing device and method
  • Automatic analog signal output/input distinguishing device and method

Examples

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Embodiment Construction

[0022] figure 1 It is a block diagram of the first preferred embodiment of the present invention. According to the present invention, the device for automatically identifying analog signal output and input at least includes a voice socket 15 , a control device 11 , a detection device 13 , and a multiplexer 16 .

[0023] The detecting device 13 is responsible for detecting the impedance of the external device inserted into the voice socket 15 . The multiplexer 16 is responsible for selecting one of multiple internal circuits (such as the analog input 19 and the analog output 18 ) to be connected to an external device. The control device 11 controls the operations of the respective devices.

[0024] In short, the control device 11 determines the type of the external device according to the voltage value detected by the detection device 13 , and then drives the multiplexer 16 to send an analog input signal or an analog output signal.

[0025] refer to Figure 2A , Figure 2A...

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Abstract

The present invention proposes one kind of automatic analog signal output and input distinguishing device and method. By means of the impedance of the external unit inserted into the phone jack, the inserted unit is judged as analog output one, such as loudspeaker, earphone, etc. or as analog input one, such as microphone, etc. while the internal circuit is switched automatically to connect the external unit.

Description

technical field [0001] The invention relates to a device and method for automatically distinguishing analog signal output and input, in particular to a device inserted into a phone jack, using the impedance of the analog signal output and input device as a signal for judging what kind of external device the analog signal is . Background technique [0002] At present, most personal computers (PCs) or notebook computers (NBs) provide two phone jacks, one for analog signal input and the other for analog signal output. Because the volume of the voice socket is very small, there is no clear identification, so that the user cannot immediately distinguish which voice socket is the input of the analog signal, and which voice socket is the output. Users often regard the input voice jack as output, or the output voice jack as input. Therefore, inconvenience to the user is caused. [0003] On the other hand, due to the advancement of technology, the volume of general notebook comput...

Claims

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Application Information

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IPC IPC(8): G06F11/34
Inventor 张义树苏祝鼎王文祺
Owner REALTEK SEMICON CORP
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