发明授权
US08976151B2 Configurable analog front-end for mutual capacitance sensing and self capacitance sensing
有权
可配置的模拟前端,用于互电容感测和自电容感测
- 专利标题: Configurable analog front-end for mutual capacitance sensing and self capacitance sensing
- 专利标题(中): 可配置的模拟前端,用于互电容感测和自电容感测
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申请号: US13717766申请日: 2012-12-18
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公开(公告)号: US08976151B2公开(公告)日: 2015-03-10
- 发明人: Kien Beng Tan , Ernesto Lasalandra , Tommaso Ungaretti , Yannick Guedon , Dianbo Guo , Paolo Angelini , Giovanni Carlo Tripoli
- 申请人: STMicroelectronics Asia Pacific Pte. Ltd. , STMicroelectronics S.r.l.
- 申请人地址: SG Singapore IT Agrate Brianza (MB)
- 专利权人: STMicroelectronics Asia Pacific Pte Ltd,STMicroelectronics S.r.l.
- 当前专利权人: STMicroelectronics Asia Pacific Pte Ltd,STMicroelectronics S.r.l.
- 当前专利权人地址: SG Singapore IT Agrate Brianza (MB)
- 代理机构: Gardere Wynne Sewell LLP
- 主分类号: G06F3/045
- IPC分类号: G06F3/045 ; G01R27/26 ; G06F3/044 ; G06F3/041
摘要:
Capacitance sensing circuits and methods are provided. A dual mode capacitance sensing circuit includes a capacitance-to-voltage converter having an amplifier and an integration capacitance coupled between an output and an inverting input of the amplifier, and a dual mode switching circuit responsive to mutual mode control signals for a controlling signal supplied from a capacitive touch matrix to the capacitance-to-voltage converter in a mutual capacitance sensing mode and responsive to self mode control signals for controlling signals supplied from the capacitive touch matrix to the capacitance-to-voltage converter in a self capacitance sensing mode, wherein the capacitance sensing circuit is configurable for operation in the mutual capacitance sensing mode or the self capacitance sensing mode.
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