发明申请
- 专利标题: CURRENT-MODE COARSE-BASELINE-CORRECTION
- 专利标题(中): 电流模式基准校正
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申请号: US14067863申请日: 2013-10-30
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公开(公告)号: US20150115977A1公开(公告)日: 2015-04-30
- 发明人: Eric Scott BOHANNON , Marshall J. BELL, JR. , Kirk HARGREAVES , Murat OZBAS , Jeffrey A. SMALL
- 申请人: SYNAPTICS INCORPORATED
- 申请人地址: US CA San Jose
- 专利权人: SYNAPTICS INCORPORATED
- 当前专利权人: SYNAPTICS INCORPORATED
- 当前专利权人地址: US CA San Jose
- 主分类号: G01R27/26
- IPC分类号: G01R27/26 ; G06F3/044 ; G01R35/00
摘要:
The embodiments herein are generally directed to using a current-mode CBC circuit to maintain a voltage bias setting at a receiver when performing capacitive sensing. To do so, the CBC circuit may compensate for the change in voltage at a receiver by providing a current at the input of the receiver. Instead of using a passive CBC capacitor for each receiver, the input device may use a single CBC capacitor and a plurality of current mirrors to source and sink the current required to correct the input voltage at a plurality of receivers. As a result, the current-mode CBC circuit includes only one passive capacitor (or bank of capacitors) and a plurality of current mirrors which may provide space and cost benefits relative to a CBC circuit that uses a passive capacitor (or bank of capacitors) for each receiver channel.
公开/授权文献
- US09541588B2 Current-mode coarse-baseline-correction 公开/授权日:2017-01-10
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