AMPLIFIER WITH A QUADRATURE AMPLITUDE MODULATION (QAM) MODULATED AND A CONTINUOUS WAVE AUTOMATIC GAIN CONTROL (AGC) CIRCUIT

AMPLIFIER WITH A QUADRATURE AMPLITUDE MODULATION (QAM) MODULATED AND A CONTINUOUS WAVE AUTOMATIC GAIN CONTROL (AGC) CIRCUIT

The present invention is directed to systems and methods for providing an AGC circuit for maintaining a constant output power level from an amplifier. More specifically, the AGC circuit includes a circuitry for determining whether an input signal is a QAM or a CW signal. A QAM/CW gain switch is then...

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1. Verfasser: AO, JIENING
Format: Patent
Sprache:eng ; fre
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator AO, JIENING
description The present invention is directed to systems and methods for providing an AGC circuit for maintaining a constant output power level from an amplifier. More specifically, the AGC circuit includes a circuitry for determining whether an input signal is a QAM or a CW signal. A QAM/CW gain switch is then controlled depending upon the input signal. Depending upon the mode of the QAM/CW gain switch, the AGC circuit either attenuates the power level of the signal or bypasses the signal. The bypassed or attenuated signal is then compared to a reference signal so that the AGC circuit produces an adjusting voltage accordingly. The amplifier finally receives the adjusting voltage and attenuates the output power level of the signal.
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subjects BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title AMPLIFIER WITH A QUADRATURE AMPLITUDE MODULATION (QAM) MODULATED AND A CONTINUOUS WAVE AUTOMATIC GAIN CONTROL (AGC) CIRCUIT
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