Invention Grant
- Patent Title: Capacitive current sensing using a current feedback amplifier
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Application No.: US14327331Application Date: 2014-07-09
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Publication No.: US09606151B2Publication Date: 2017-03-28
- Inventor: Michael D. Seeman
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Michael A. Davis, Jr.; Charles A. Brill; Frank D. Cimino
- Main IPC: G01R19/00
- IPC: G01R19/00 ; G01R1/30 ; H03F3/04 ; H03F3/45 ; H03F3/217 ; H02M1/00

Abstract:
A circuit for sensing current in a capacitive network. A first capacitor carries a first current. A second capacitor is connected to the first capacitor thereby forming a current divider. The second capacitor carries a second current which is proportional to the first current. A transimpedance amplifier is connected to the second capacitor and has a voltage output that is proportional to the second current. Using a current feedback amplifier as the transimpedance amplifier significantly improves bandwidth and stability.
Public/Granted literature
- US20160011242A1 CAPACITIVE CURRENT SENSING USING A CURRENT FEEDBACK AMPLIFIER Public/Granted day:2016-01-14
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