INPUT BUFFER AND NOISE CANCELLATION METHOD THEREOF
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United States of America Patent
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Issued Date -
Apr 11, 2019
app pub date -
Dec 20, 2017
filing date -
Oct 11, 2017
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Abstract
An input buffer is provided, which may include a noise sensor, a first follower and a subtractor. The common terminal of the first follower may be coupled to the noise sensor; a first bias current source may be coupled to the output of the first follower to generate a first noise current. The subtractor may be coupled to the first follower and the noise sensor. The noise sensor may sense the first noise current and then generate a noise cancellation current via the subtractor in order to cancel the noise generated by the first noise current.
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