Glossary Definition for Class H

Definition

Class H amplifiers modulate the supply voltage to the amplifier output devices so that it is never higher than necessary to support the signal swing. This reduces dissipation across the output devices connected to that supply and allows the amplifier to operate with an optimized class AB efficiency regardless of output power level.

Class H amplifiers are generally more complex than other designs, with extra control circuitry required to predict and control the supply voltage.

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