FLYING CAPACITOR VOLTAGE CONTROL IN AN AMPLIFIER

FLYING CAPACITOR VOLTAGE CONTROL IN AN AMPLIFIER

An amplifier comprises: an input stage, a pulse width modulation stage, and a switched output stage. During operation, the input stage receives an input signal (such as an audio signal). The input stage adjusts the input signal based on feedback from the switched output stage of the amplifier. Accor...

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1. Verfasser: HOYERBY, Mikkel
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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description An amplifier comprises: an input stage, a pulse width modulation stage, and a switched output stage. During operation, the input stage receives an input signal (such as an audio signal). The input stage adjusts the input signal based on feedback from the switched output stage of the amplifier. According to one configuration, the feedback from the switched output stage is a voltage across a flying capacitor disposed in the switched output stage. The pulse width modulation stage uses the adjusted input signal or signals to produce respective pulse width modulation signals that are subsequently used to drive (control) switches in the switched output stage. The switches in the switched output stage generate an output voltage to drive a load based on states of the pulse width modulation signals. Adjustments applied to the input signal based on the feedback maintains the magnitude of the flying capacitor voltage at a desired setpoint.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title FLYING CAPACITOR VOLTAGE CONTROL IN AN AMPLIFIER
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