Programmable gain amplifier with impedance matching and reverse isolation
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United States of America
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Nov 26, 2024
Grant Date -
Aug 24, 2023
app pub date -
Feb 18, 2022
filing date -
Feb 18, 2022
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Abstract
A programmable gain amplifier includes a programmable resistor ladder deployed across Nmax junction nodes and controlled by Nmax−1 resistor control signals, where Nmax is an integer greater than one; a common-gate cascode amplifier multiplexer comprising Nmax common-gate cascode amplifiers configured to receive Nmax internal voltages at the Nmax junction nodes and output Nmax output currents in accordance with Nmax amplifier control signals, respectively, to an output node that is loaded with a load; and an AC (alternate current) coupling capacitor configured to couple an input node to the first junction node.
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