Optimum current control CMOS cascode amplifier
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United States of America Patent
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Jul 4, 2017
Grant Date -
May 4, 2017
app pub date -
Nov 4, 2015
filing date -
Nov 4, 2015
priority date (Note) -
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Abstract
A CMOS cascode amplifier comprises a cascode circuit comprising a plurality of branches in parallel, each branch comprising a first transistor and a second switchable transistor connected in series forming a cascode pair, wherein the cascode circuit is configured to amplify an input signal. The CMOS cascode amplifier further comprises a bias circuit configured to bias the cascode circuit by providing a bias signal to the first transistor in each of the plurality of the branches in the cascode circuit. In addition, the CMOS cascode amplifier comprises a switching control circuit configured to control a quiescent current in the cascode circuit based on selectively activating the plurality of branches by providing a switching control signal that switches on the second switchable transistor in the one or more activated branches.
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