ACTIVE BIAS FOR RADIO FREQUENCY POWER AMPLIFIER

ACTIVE BIAS FOR RADIO FREQUENCY POWER AMPLIFIER

A transceiver (100) includes a radio frequency power amplifier (116) which is biased by an active bias circuit (110). Active bias circuit (110) provides a low cost bias circuit for amplifier (116) which adjusts the bias over changes in temperature and supply voltage levels to provide a constant outp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BELLOTTI, ENRICO, EBERHARDT, JOHN E
Format: Patent
Sprache:eng ; fre
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Beschreibung
Zusammenfassung:A transceiver (100) includes a radio frequency power amplifier (116) which is biased by an active bias circuit (110). Active bias circuit (110) provides a low cost bias circuit for amplifier (116) which adjusts the bias over changes in temperature and supply voltage levels to provide a constant output power. A set of control inputs (122-126) coming from controller (108) provide for power output level adjustement for the amplifier (116) in a frequency modulated (FM) environment and for both power and modulation level adjustments in an amplitude modulated (AM) environment.