Complementary field effect transistor differential amplifier

Details Complementary field effect transistor differential amplifier Complementary field effect transistor differential amplifier

1976-02-09

1976-11-09

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330 18, 330 19, 330 22, 330 28, 330 30D, 330 35, H03F 318

Patent

active

039913805

ABSTRACT:
A feedback circuit responsive to the output signals of two amplifiers provides feedback in a sense to amplify differential mode components and reject common mode components of input signals supplied to the amplifiers, the resultant common mode rejection ratio (CMRR) being substantially independent of the magnitude of the common mode voltage. A further feedback circuit provides feedback of a sense to increase the CMRR when the magnitude of the common mode voltage differs in either sense from a given value whereby the net CMRR increases from a minimum value as the common mode voltage varies in either sense from the given value.

REFERENCES:
patent: 3870966 (1975-03-01), Dingwall

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