Differential amplifier with symmetric circuit topology

Details Differential amplifier with symmetric circuit topology Differential amplifier with symmetric circuit topology

2011-06-07

2011-06-07

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S264000

Reexamination Certificate

active

07956686

ABSTRACT:
A differential amplifier circuit is provided with a first input stage including a transistor pair of a first conductivity type, of which transistor pair receives differential input signals; a first output stage connected to the first input stage; a second input stage including a transistor pair of a second conductivity type different from the first conductivity type, of which transistor pair receives the differential input signals; a second output stage connected to the second input stage; and an output terminal. The second output stage is structured with a circuit topology in which transistors of the first conductivity type in the first output stage are replaced with transistors of the second conductivity type, transistors of the second conductivity type in the first output stage are replaced with transistors of the first conductivity type, ground terminals in the first output stage are replaced with power supply terminals, and power supply terminals in the first output stage are replaced with ground terminals. The output terminal is commonly connected to outputs of the first and second output stages.

REFERENCES:
patent: 4377789 (1983-03-01), Hoover
patent: 5751186 (1998-05-01), Nakao
patent: 7474153 (2009-01-01), Dasgupta

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