Transistor constant bias circuits

Details Transistor constant bias circuits Transistor constant bias circuits

1987-02-05

1988-08-09

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307255, 307310, 330285, H03K 301, H03G 310

Patent

active

047630183

ABSTRACT:
A circuit (FIG. 4) in which a sub-circuit comprised of a bias transistor (T1), a feedback reisistor (R2) connected between the collector of this transistor (T1) and its base, and, a drive transistor (T2), is connected to its polarity-inverse sub-circuit (T1', R2', T2') in a ring configuration and is initiated by means of current injection from a start-up bias circuit. The latter may comprise a bias transistor (T1"), a drive transistor (T2") the base of which is connected to the collector of the bias transistor (T1"), and a pair of feedback current/voltage divider resistors (R1", R2") in the collector path of the bias transistor (T1"). Following start-up, constant current is maintained by feedback in the ring, and this current may be tapped at an appropriate point in the ring.

REFERENCES:
patent: 3939434 (1976-02-01), Crosby
patent: 3955108 (1976-04-01), Beck
patent: 4016435 (1977-05-01), Voorman
patent: 4029974 (1977-06-01), Brokaw

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