Local feedback stabilized emitter follower cascade

Details Local feedback stabilized emitter follower cascade Local feedback stabilized emitter follower cascade

1992-08-31

1995-05-16

Wolfe, Willis R.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

330293, 327575, H03K 1908, H03F 134

Patent

active

054163650

ABSTRACT:
When plural emitter follower cascaded transistors are employed as a buffer to drive a capacitive load wherein instabilities can occur. The capacitive loads can result in either ringing or oscillation within such a buffer. The invention relates to applying negative feedback around one or more emitter followers in the cascade. In the preferred embodiment a three stage cascade of emitter followers is employed with negative feedback connected around the penultimate stage.

REFERENCES:
patent: 3517324 (1970-06-01), Perlman
patent: 4187472 (1980-02-01), Yum
patent: 4616144 (1986-10-01), Hideshima et al.
patent: 4754158 (1988-06-01), Halberstein
patent: 4833424 (1989-05-01), Wright
patent: 4886985 (1989-12-01), Flohrs et al.
patent: 4931666 (1990-06-01), Ito

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