High efficiency bridge amplifier

Amplifiers – Combined with automatic amplifier disabling switch means

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330146, H03F 114

Patent

active

056546688

ABSTRACT:
Distorting effects and disturbances caused by abrupt voltage changes on the output nodes of a pair of selfconfiguring amplifiers for alternatively driving in a bridge mode or in a single-ended mode by one amplifier of the pair a certain load, in dependence on the level of the input signal, because of the enabling/disabling of a common mode control loop, are effectively eliminated by storing the voltage of a common mode control node of the pair of amplifiers on a capacitance during a phase of disabling of said common mode control loop. Abrupt voltage drops and recoveries at the switching instants are prevented.

REFERENCES:
patent: 4494077 (1985-01-01), Fukaya et al.
patent: 4983927 (1991-01-01), Torazzina
patent: 5194821 (1993-03-01), Brambilla et al.
patent: 5365188 (1994-11-01), Botti et al.
patent: 5444417 (1995-08-01), Botti et al.

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