DC OFFSET CANCELATION CIRCUIT
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United States of America Patent
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Issued Date -
May 16, 2013
app pub date -
Sep 14, 2012
filing date -
Nov 11, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
There is provided a DC offset cancellation circuit including: a capacitor circuit unit including at least one capacitor connected between an input terminal and an input of an amplifier; a MOSFET circuit unit including a plurality of MOSFETs connected in series between a first connection node connected to a predetermined one of both terminals of the capacitor circuit unit and a ground and operating in a linear region; and a switching circuit unit including a plurality of switch elements for selecting several MOSFETs previously selected from among the plurality of MOSFETs of the MOSFET circuit unit, respectively.
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