Differential amplifying system

Details Differential amplifying system Differential amplifying system

1978-01-10

1979-07-24

Dahl, Lawrence J.

Amplifiers

Sum and difference amplifiers

330 84, 330258, H03F 345

Patent

active

041624564

ABSTRACT:
A differential amplifying circuit eliminates the common mode component of a composite signal consisting of the common mode component and a differential component. Two differential amplifiers are coupled to a composite signal source so that one amplifier amplifies only the differential component and transfers the common mode component unchanged. The other amplifier processes the common mode component. The outputs of the differential amplifiers are connected to a voltage divider. The output of the circuit is taken from a tap on this voltage divider at a point where the common mode component is eliminated so that only the amplified differential component remains.

REFERENCES:
patent: 4047122 (1977-09-01), Rao

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