High G temperature compensated current source

Details High G temperature compensated current source High G temperature compensated current source

1991-10-04

1993-01-12

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330289, H03F 316

Patent

active

051793571

ABSTRACT:
A current source which provides a given ratio (G) of an output current (I) to an input current (i). The current source includes a first series combination of a first resistor (R.sub.1) connected in series with the main current path of a first transistor (T.sub.1) and a second series combination of a second resistor (R.sub.3) connected in series with the main current path of a second transistor (T.sub.2). The first and second transistors (T.sub.1, T.sub.2) form a current mirror circuit. A current equalizer is coupled to the current mirror circuit in such a way as to produce in the first series combination an equalizing voltage drop equal to ##EQU1## i.sub.s1 and i.sub.s2 denoting the characteristic current constants of the first and second transistors (T.sub.1, T.sub.2).

REFERENCES:
patent: 4242650 (1980-12-01), Cordell
patent: 4350904 (1982-09-01), Cordell
patent: 4356454 (1982-10-01), Sueyoshi et al.
patent: 4356455 (1982-10-01), Ozawa et al.
patent: 4540896 (1985-09-01), Tanaka
patent: 4990803 (1991-02-01), Gilbert

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