Current buffer circuit with enhanced response speed to input sig

Details Current buffer circuit with enhanced response speed to input sig Current buffer circuit with enhanced response speed to input sig

1995-02-22

1996-08-27

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Accelerating switching

327112, 327379, 327478, H03K 1704

Patent

active

055505015

ABSTRACT:
A current buffer circuit comprises an input terminal, an output terminal, a first transistor of a first conductivity type having a base connected to the input terminal and an emitter, and a second transistor of a second conductivity type having a base connected to the input terminal and an emitter. The buffer circuit further includes a third transistor of the second conductivity type having a base connected to the emitter of the first transistor, a collector connected to a first power supply terminal, and an emitter connected to the output terminal, a fourth transistor of the first conductivity type having a base connected to the emitter of the second transistor, a collector connected to a second power supply terminal, and an emitter connected to the output terminal, and a fifth transistor of the second conductivity type having a base connected to the collector of said fourth transistor, a collector connected to said output terminal, and an emitter connected to the second power supply terminal. The fifth transistor becomes conductive when the current flows from the output terminal to the second power supply terminal through the fourth transistor.

REFERENCES:
patent: 4549095 (1985-10-01), Stefani et al.
patent: 4553044 (1985-11-01), Bittner
patent: 4697103 (1987-09-01), Ferris et al.
patent: 4698519 (1987-10-01), Cim et al.
patent: 4739190 (1988-04-01), Alzati et al.
patent: 4880998 (1989-11-01), Ueda
patent: 5138195 (1992-08-01), Satou et al.
patent: 5296765 (1994-03-01), Williams et al.

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