Differential amplifier system

Details Differential amplifier system Differential amplifier system

1980-09-29

1982-11-30

Mullins, James B.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 69, 330 84, 330258, G06G 718, H03F 368

Patent

active

043618111

ABSTRACT:
Two operational amplifiers are hooked in a different mode by unique circuitry so that the common mode gain is unity and the open loop gain is the same as the open loop gain of the individual amplifiers. Essentially, a negative feedback network feeds the common mode output signal back to the negative input terminals which cancels the common mode output signal. Practical applications are achieved by adding appropriate integrating capacitors between the output and negative inputs of the amplifiers with appropriate series resistances in the input leads.

REFERENCES:
patent: 3732501 (1973-05-01), Fischer, Jr. et al.
patent: 4088961 (1978-05-01), Ashley
patent: 4242741 (1980-12-01), Parrish

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