Differential amplifier having balanced output

Details Differential amplifier having balanced output Differential amplifier having balanced output

1983-01-31

1985-04-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330151, 330301, H03F 345

Patent

active

045118523

ABSTRACT:
A classical differential amplifier provides outputs of unequal magnitude due to its emitter resistance being finite. In order to equalize its output, a voltage follower circuit is associated with each of the inputs of the differential amplifier. The output of each voltage follower circuit is converted to a current and subtracted from one of the outputs of the differential amplifier. Subtracting the outputs results in a differential amplifier with both outputs being substantially equal.

REFERENCES:
patent: 3838210 (1974-09-01), Peil
patent: 4146844 (1979-03-01), Quinn
Faulkenberry, Luces M., An Introduction to Op Amps, 2nd ed., Wiley & Sons, 1977, p. 16.

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