Invention Grant
- Patent Title: Fast settling capacitive gain amplifier circuit
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Application No.: US15600484Application Date: 2017-05-19
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Publication No.: US10044327B2Publication Date: 2018-08-07
- Inventor: Hanqing Wang , Gerard Mora-Puchalt
- Applicant: Analog Devices Global
- Applicant Address: BM Hamilton
- Assignee: Analog Devices Global
- Current Assignee: Analog Devices Global
- Current Assignee Address: BM Hamilton
- Agency: Schwegman Lundberg & Woessner, P.A.
- Main IPC: H03F3/00
- IPC: H03F3/00 ; H03F1/02 ; H03F1/32 ; H03F1/56 ; H03F3/393 ; H03F3/42 ; H03F3/45 ; H03F1/14 ; H03F3/387 ; H03M3/00

Abstract:
A capacitive gain amplifier circuit includes two sets of Miller capacitors and two output stage differential amplifier circuits. A first set of Miller capacitors is used to compensate the first output stage differential amplifier circuit during a first phase that resets the first output stage differential amplifier circuit. The second set of Miller capacitors is used to compensate the first output stage differential amplifier circuit during a second phase that chops a signal being amplified. The second set of Miller capacitors is swapped from one polarity to an opposite polarity of the first output stage differential amplifier circuit during successive second phases. The second output stage differential amplifier circuit includes a set of inputs selectively coupled with the inputs of the first output stage differential amplifier circuit and a set of outputs selectively coupled with the outputs of the first output stage differential amplifier circuit during the second phase.
Public/Granted literature
- US20180076779A1 FAST SETTLING CAPACITIVE GAIN AMPLIFIER CIRCUIT Public/Granted day:2018-03-15
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