Amplifier circuit

Amplifier circuit

An amplifier circuit includes a bias control feedback loop. A sensing transistor (108) is matched to one or more power transistors (101a, 101b, 101c) and is correspondingly biased. The difference between collector voltage of the sensing transistor (108) and a reference voltage amplified by a differe...

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Hauptverfasser: LERKE, PETER DAM, RIISHOEJ, JESPER
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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creator LERKE, PETER DAM
RIISHOEJ, JESPER
description An amplifier circuit includes a bias control feedback loop. A sensing transistor (108) is matched to one or more power transistors (101a, 101b, 101c) and is correspondingly biased. The difference between collector voltage of the sensing transistor (108) and a reference voltage amplified by a differential amplifier (111, 114) to provide the base bias voltage for the power transistors (101a, 101b, 101c) and the sensing transistor (105). The gain of the amplifier is controlled by applying a control voltage to a resistor (110) connected to the collector of the sensing transistor (105).
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title Amplifier circuit
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