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Capacitive Trans-Impedance Amplifier Circuit with Charge Injection CompensationA capacitive trans-impedance amplifier circuit with charge injection compensation is provided. A feedback capacitor is connected between an inverting input port and an output port of an amplifier. A MOS reset switch has source and drain terminals connected between the inverting input and output ports of the amplifier, and a gate terminal controlled by a reset signal. The reset switch is open or inactive during an integration phase, and closed or active to electrically connect the inverting input port and output port of the amplifier during a reset phase. One or more compensation capacitors are provided that are not implemented as gate oxide or MOS capacitors. Each compensation capacitor has a first port connected to a compensation signal that is a static signal or a toggling compensation signal that toggles between two compensation voltage values, and a second port connected to the inverting input port of the amplifier.
Document ID
20160013210
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Milkov, Mihail M.
Gulbransen, David J.
Date Acquired
November 1, 2016
Publication Date
October 25, 2016
Subject Category
Electronics And Electrical Engineering
Funding Number(s)
CONTRACT_GRANT: NNX13AE57G
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-9,479,116
Patent Application
US-Patent-Appl-SN-14/671,930

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