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公开(公告)号:US12092671B2
公开(公告)日:2024-09-17
申请号:US17794044
申请日:2020-12-17
发明人: Chen Chen
CPC分类号: G01R27/2605 , G01D5/24
摘要: Provided is a capacitance measurement apparatus (200), including: a channel capacitor (101) configured to generate different capacitance values according to a sensing signal; a measurement circuit (220) connected to the channel capacitor (101) and configured to access a pulse signal and measure a capacitance value of the channel capacitor (101); and an adjustment circuit (210) connected between the channel capacitor (101) and the measurement circuit (220), and configured to cancel a basic capacitance value of the channel capacitor (101) and generate a varying capacitance value of the channel capacitor (101). The measurement circuit (220) is further configured to convert the varying capacitance value of the channel capacitor (101) into an output signal. A reference capacitance of the channel capacitor (101) is canceled by means of the adjustment circuit (210), thereby increasing the valid range of an output signal of the measurement circuit (220).
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公开(公告)号:US20230065600A1
公开(公告)日:2023-03-02
申请号:US17794044
申请日:2020-12-17
发明人: Chen Chen
摘要: Provided is a capacitance measurement apparatus (200), including: a channel capacitor (101) configured to generate different capacitance values according to a sensing signal; a measurement circuit (220) connected to the channel capacitor (101) and configured to access a pulse signal and measure a capacitance value of the channel capacitor (101); and an adjustment circuit (210) connected between the channel capacitor (101) and the measurement circuit (220), and configured to cancel a basic capacitance value of the channel capacitor (101) and generate a varying capacitance value of the channel capacitor (101). The measurement circuit (220) is further configured to convert the varying capacitance value of the channel capacitor (101) into an output signal. A reference capacitance of the channel capacitor (101) is canceled by means of the adjustment circuit (210), thereby increasing the valid range of an output signal of the measurement circuit (220).
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