Buffer amplifier

Details Buffer amplifier Buffer amplifier

1978-11-03

1980-09-02

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

330307, 330311, H03F 318

Patent

active

042209323

ABSTRACT:
A buffer amplifier is described for use in an integrated circuit in which a siganl from a processing circuit is coupled by the buffer amplifier to an output pin on the integrated circuit. The buffer amplifier includes a pair of transistors, the first of which receives the output of the processing circuit and is preferably arranged in an emitter-follower configuration. A resistor internal to the integrated circuit is coupled between ground and the emitter of the first transistor. The second transistor, preferably a vertical PNP type transistor, is arranged in a circuit configuration to couple the output of the first transistor to the output pin and to sink any current flowing to the output pin from a circuit driven by the buffer amplifier.

REFERENCES:
patent: 2963656 (1960-12-01), Parris
patent: 4123723 (1978-10-01), Sugawara

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