Invention Grant
- Patent Title: Readout circuit for self-balancing capacitor bridge
- Patent Title (中): 自平衡电容桥读出电路
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Application No.: US13220306Application Date: 2011-08-29
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Publication No.: US08854062B2Publication Date: 2014-10-07
- Inventor: Vladimir Petkov , Ganesh Balachandran
- Applicant: Vladimir Petkov , Ganesh Balachandran
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot, Moore & Beck
- Main IPC: G01R27/26
- IPC: G01R27/26 ; G01P15/125 ; G01D5/24 ; G01L1/14

Abstract:
A capacitive transducer and a readout circuit for processing a signal from a capacitive transducer. The readout circuit includes a high gain circuit element, two summing amplifiers and two feedback path. The high gain circuit element generates an amplified transducer signal, and the summing amplifiers sum the amplified transducer signal with a positive reference voltage and the negative reference voltage, respectively, to generate a first summation signal and a second summation signal. The feedback paths feed back the summation signals to the transducer. Output circuitry generates an output signal based on the summation signals. The high gain circuit element can be a a switched capacitor integrator. The output circuitry can generates the output signal based on the first and second summation signals.
Public/Granted literature
- US20130049525A1 READOUT CIRCUIT FOR SELF-BALANCING CAPACITOR BRIDGE Public/Granted day:2013-02-28
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