Invention Grant
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
- Patent Title: Configurable analog front-end for mutual capacitance sensing and self capacitance sensing
- Patent Title (中): 可配置的模拟前端,用于互电容感测和自电容感测
-
Application No.: US13717766Application Date: 2012-12-18
-
Publication No.: US08976151B2Publication Date: 2015-03-10
- Inventor: Kien Beng Tan , Ernesto Lasalandra , Tommaso Ungaretti , Yannick Guedon , Dianbo Guo , Paolo Angelini , Giovanni Carlo Tripoli
- Applicant: STMicroelectronics Asia Pacific Pte. Ltd. , STMicroelectronics S.r.l.
- Applicant Address: SG Singapore IT Agrate Brianza (MB)
- Assignee: STMicroelectronics Asia Pacific Pte Ltd,STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics Asia Pacific Pte Ltd,STMicroelectronics S.r.l.
- Current Assignee Address: SG Singapore IT Agrate Brianza (MB)
- Agency: Gardere Wynne Sewell LLP
- Main IPC: G06F3/045
- IPC: G06F3/045 ; G01R27/26 ; G06F3/044 ; G06F3/041

Abstract:
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.
Public/Granted literature
- US20140078096A1 CONFIGURABLE ANALOG FRONT-END FOR MUTUAL CAPACITANCE SENSING AND SELF CAPACITANCE SENSING Public/Granted day:2014-03-20
Information query