Biasing network for integrated pairs of amplifiers internally co

Details Biasing network for integrated pairs of amplifiers internally co Biasing network for integrated pairs of amplifiers internally co

1989-04-25

1990-08-14

Mottola, Steven

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

330 84, H03F 368

Patent

active

049490494

ABSTRACT:
In an integrated amplifier comprising at least a pair of operational amplifiers which may be connected in a single-ended configuration to form a stereo amplifier or alternatively in a bridge configuration to increase the output dynamics, a single constant current generator for generating a current having a value which is twice the value of the bias current of the input stages of the two operational amplifiers, is connected between an inverting input of one of the two operational amplifiers and ground, and allows for elimination of the offset voltage without contributing to an increase, in any appreciable way, of the noise level at the inputs and without the signal applied to the input terminals of the integrated amplifier causing modulation problems.

REFERENCES:
patent: 4494077 (1985-01-01), Fukaya et al.
patent: 4827221 (1989-05-01), Botti et al.

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