Difference amplifier having extended common mode range

Details Difference amplifier having extended common mode range Difference amplifier having extended common mode range

1976-04-05

1977-07-19

Rolinec, Rudolph V.

Amplifiers

Sum and difference amplifiers

179 1A, 330 30D, 330108, H03F 345

Patent

active

040371700

ABSTRACT:
A difference amplifier, the construction of which includes operational amplifier, has an extended amplitude range of common mode signal. The input of the circuit which is applied to the inversion input of the operating amplifier is applied to the latter through an attenuation network. An adjustment of the other resistor values in the circuit is made to appropriately retain the desirable characteristics of keeping common mode rejection.

REFERENCES:
patent: 3972006 (1976-07-01), Ruegg
Ritter - "Controlling Op-Amp Gain with One Potentiometer" - Electronics, p. 78; July 1972.

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