A photoelectric conversion circuit applied to mouse equipment

A technology of photoelectric conversion circuits and equipment, applied in the direction of analog-to-digital converters, etc., can solve the problems of weak output electrical signal strength, large occupied area, and high cost, and achieve the effects of enhancing photoelectric performance, reducing occupied area, and reducing costs

Active Publication Date: 2018-11-27
CRM ICBG (WUXI) CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply using CMOS image sensing technology for photoelectric conversion does not take into account the linear conversion problem between photoelectric signals, resulting in the inability to effectively convert optical signals into electrical signals in the nonlinear region; an

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  • A photoelectric conversion circuit applied to mouse equipment
  • A photoelectric conversion circuit applied to mouse equipment
  • A photoelectric conversion circuit applied to mouse equipment

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[0015] The specific implementation and working principle of the present invention will be further described below in conjunction with the drawings and preferred solutions.

[0016] Such as figure 1 Shown is a schematic block diagram of the circuit connection peripheral structure of the present invention. This figure shows the principle diagram of applying the conversion circuit of the present invention to a specific circuit. The working principle of the figure is: the photodiode array module converts the optical signal into an electrical signal. After being amplified by the buffer and amplifying module, the electrical signal is converted into a digital signal by the ADC conversion module and input to the peripheral structure DSP. DSP and MCU are serialized Bus interface, receiving MCU setting instructions and sending displacement information data to MCU. At the same time, DSP also controls the work of the timing generating circuit, receiving and processing the data converted by th...

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Abstract

The invention relates to a field of photoelectric technologies, and specifically relates to a photoelectric conversion circuit applied to mouse equipment. The photoelectric conversion circuit comprises a PD pipe array module, a buffer amplifier module and an ADC (Analog to Digital Converter) module; the photoelectric conversion circuit is characterized in that a row-column gating signal of the PD pipe array module is provided by a peripheral time sequence generation circuit; an output end of the PD pipe array module is connected with an input end of the buffer amplifier module; an output end of the buffer amplifier module is connected with an input end of the ADC module; the output end of the buffer amplifier module is connected with a peripheral DSP (Digital Signal Processor); the peripheral DSP controls the time sequence generation circuit to work. The photoelectric conversion circuit applied to the mouse equipment provided by the invention can be applied to different photoelectric current characteristics and enhances the photoelectric performance of an optical mouse; meanwhile, the varying optical signals can be totally converted into digital signals without omission; besides, two stage conversion is adopted to an ADC circuit, thus the area can be effectively reduced.

Description

technical field [0001] The invention relates to the field of photoelectric technology, in particular to a photoelectric conversion circuit applied to a mouse device. Background technique [0002] Existing photoelectric conversion circuits generally use CMOS image sensing technology to simply perform photoelectric conversion or use parallel conversion ADC modules. However, simply using CMOS image sensing technology for photoelectric conversion does not take into account the linear conversion problem between photoelectric signals, resulting in the inability to effectively convert optical signals into electrical signals in the nonlinear region; and the output electrical signal strength is weak, which requires After amplification and digital-to-analog conversion, it is used in a digital system. Although the parallel conversion ADC module can increase the speed of analog-to-digital conversion, it occupies a large area and costs high. Contents of the invention [0003] The obj...

Claims

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Application Information

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IPC IPC(8): H03M1/12
Inventor 黄燕辛辉马刚曹旺
Owner CRM ICBG (WUXI) CO LTD
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