SYSTEM AND METHOD FOR CONTROLLING COMMON MODE VOLTAGE VIA REPLICA CIRCUIT AND FEEDBACK CONTROL

SYSTEM AND METHOD FOR CONTROLLING COMMON MODE VOLTAGE VIA REPLICA CIRCUIT AND FEEDBACK CONTROL

The disclosure relates to a system and method for controlling a common mode voltage of an output differential signal of a differential signal processing circuit using a replica circuit and feedback control. The differential signal processing circuit includes two load devices, two input transistors,...

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Hauptverfasser: RASMUS, Todd Morgan, PRASAD, Mangal, YUAN, Xiaobin, NATONIO, Joseph
Format: Patent
Sprache:eng ; fre ; ger
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
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creator RASMUS, Todd Morgan
PRASAD, Mangal
YUAN, Xiaobin
NATONIO, Joseph
description The disclosure relates to a system and method for controlling a common mode voltage of an output differential signal of a differential signal processing circuit using a replica circuit and feedback control. The differential signal processing circuit includes two load devices, two input transistors, and two current-source transistors coupled in series between voltage rails, respectively. The replica circuit includes replica load device, replica input transistor, and replica current-source transistor coupled in series between the voltage rails. The common mode voltage of the input differential signal is applied to the replica input transistor to generate a replica output common mode voltage. A feedback circuit generates a bias voltage for the replica current-source transistor and the current-source transistors of the differential circuit to set and control the replica output common mode voltage and the output common mode voltage of the differential signal processing circuit to a target common mode voltage.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
title SYSTEM AND METHOD FOR CONTROLLING COMMON MODE VOLTAGE VIA REPLICA CIRCUIT AND FEEDBACK CONTROL
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