Variable admittance circuit
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United States of America Patent
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Feb 24, 2015
Issued Date -
N/A
app pub date -
Mar 3, 2014
filing date -
Mar 6, 2013
priority date (Note) -
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Abstract
A programmable variable admittance circuit may be used in a programmable filter or a variable gain amplifier in a number of different applications including tuners and other RF receiver circuits. A variable admittance circuit and operation is described including a number of switchable admittance elements arranged in parallel branches. The variable admittance circuit requires fewer transitions to change between successive admittance values than a binary weighted circuit and fewer branches for implementation then a thermometry admittance circuit.
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