CN115244590A - 一种电容式指纹识别系统及电子设备及指纹识别方法 - Google Patents
一种电容式指纹识别系统及电子设备及指纹识别方法 Download PDFInfo
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- CN115244590A CN115244590A CN202080097906.3A CN202080097906A CN115244590A CN 115244590 A CN115244590 A CN 115244590A CN 202080097906 A CN202080097906 A CN 202080097906A CN 115244590 A CN115244590 A CN 115244590A
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Abstract
本发明公开了一种电容式指纹识别系统及电子设备及指纹识别方法中，所述电容式指纹识别系统包括：积分电路，包括：运放器，具有正相输入端、负相输入端、接地端和输出端；连接在所述负相输入端和所述输出端之间的反馈支路；指纹信息采集电路，与所述负相输入端连接，用于输入参考电压以及第一电压信号，并采集指纹信息；浮地信号产生电路，与所述接地端连接，用于基于第二电压信号和第三电压信号，为接地端提供与工作模式适配的浮地信号，选择输出浮地信号为幅值恒定的第一接地电压或是幅值周期性变化的第二接地电压。本发明技术方案通过为所述接地端提供与工作模式适配的浮地信号，可以基于需求使得所述电容式指纹识别系统工作在不同的模式。
Description
PCT国内申请，说明书已公开。
Claims (13)
- PCT国内申请，权利要求书已公开。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/132173 WO2022109999A1 (zh) | 2020-11-27 | 2020-11-27 | 一种电容式指纹识别系统及电子设备及指纹识别方法 |
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| Publication Number | Publication Date |
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| CN115244590A true CN115244590A (zh) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202080097906.3A Pending CN115244590A (zh) | 2020-11-27 | 2020-11-27 | 一种电容式指纹识别系统及电子设备及指纹识别方法 |
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| Country | Link |
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| CN (1) | CN115244590A (zh) |
| WO (1) | WO2022109999A1 (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115202425B (zh) * | 2022-09-15 | 2022-11-22 | 成都市易冲半导体有限公司 | 串行通信总线超低电源电压检测的io设计电路及方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105117684B (zh) * | 2015-07-27 | 2017-04-19 | 深圳市汇顶科技股份有限公司 | 指纹检测电路及指纹辨识系统 |
| CN106778672B (zh) * | 2016-12-30 | 2023-05-05 | 深圳芯启航科技有限公司 | 一种指纹检测电路和指纹检测传感器 |
| CN206532303U (zh) * | 2016-12-30 | 2017-09-29 | 深圳芯启航科技有限公司 | 一种指纹检测电路和指纹检测传感器 |
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- 2020-11-27 CN CN202080097906.3A patent/CN115244590A/zh active Pending
- 2020-11-27 WO PCT/CN2020/132173 patent/WO2022109999A1/zh unknown
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| Publication number | Publication date |
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| WO2022109999A1 (zh) | 2022-06-02 |
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