PROGRAMMABLE GAIN AMPLIFIER WITH IMPEDANCE MATCHING AND REVERSE ISOLATION

PROGRAMMABLE GAIN AMPLIFIER WITH IMPEDANCE MATCHING AND REVERSE ISOLATION

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 configure...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: Lin, Chia-Liang (Leon)
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
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Beschreibung
Zusammenfassung: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.