Method and apparatus of an input resistance of a passive mixer to broaden the input matching bandwidth of a common source/gate LNA
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United States of America Patent
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May 1, 2018
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app pub date -
Nov 21, 2016
filing date -
Dec 6, 2011
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Abstract
A receiver comprises a Low Noise Amplifier (LNA) configured to amplify an input signal and a resonant circuit coupled to the LNA. A first switch couples current from the resonant circuit to a first capacitor integrating a first voltage, wherein the first switch is enabled with a clock signal. A second switch couples current from the resonant circuit to a second capacitor integrating a second voltage, wherein the second switch is enabled with an inverse clock signal. A differential amplifier comprises a positive input for receiving the first voltage and a negative input for receiving the second voltage in order to produce a sum and a difference frequency spectrum between a signal spectrum carried within the current and a frequency of the clock signal.
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