PHASE NOISE REDUCTION IN A VARIABLE ANALOGUE RF RESONATOR WITH SWITCHED CAPACITORS
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United States of America Patent
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Issued Date -
Nov 24, 2022
app pub date -
Apr 29, 2022
filing date -
Apr 29, 2022
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Abstract
An active feedback RF resonator has a signal loop having a signal input and a signal output. The signal loop has a variable gain stage and at least one variable resonator, each variable resonator comprising an inductance element and a variable capacitance element comprising a number of switched fixed value capacitors and a variable capacitor. A phase noise of the active feedback RF signal has a maximum value for an operating frequency of the variable resonator that is based on an operating range of the variable capacitor.
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