Amplification circuit improved with linearity and frequency converter using the same
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United States of America Patent
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Jul 29, 2008
Grant Date -
Mar 15, 2007
app pub date -
Aug 25, 2006
filing date -
Aug 30, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Provided is a frequency converter using an amplification circuit that is improved with linearity by coupling a main transistor and an auxiliary transistor in parallel. An amplification circuit that is improved with linearity comprises an input block amplifying an input signal, an induction block inducing a current proportionate to an output signal of the input block and an amplification block comprising. The amplification block comprises a main transistor amplifying the output signal of the induction block, wherein the main transistor is biased to operate at a saturation region and an auxiliary transistor amplifying the output signal of the induction block, wherein the auxiliary transistor is biased to operate at a subthreshold region and coupled to the main transistor in parallel.
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