Bipolar logic having graded power

Details Bipolar logic having graded power Bipolar logic having graded power

1976-07-06

1978-08-08

Schaefer, Robert K.

357 46, G04C 300

Patent

active

041048580

ABSTRACT:
An electronic timekeeping system is implemented in bipolar integrated circuit technology for displaying time by way of a digital display. The bipolar circuitry is implemented utilizing integrated injection logic and the countdown chain utilizes flip-flops having geometrics configured to effect power grading. That is, the emitter geometry of the PNP injector is selectively varied so as to vary the injection base drive current.

REFERENCES:
patent: 3736477 (1973-05-01), Berger et al.
patent: 3886726 (1975-06-01), Williams et al.
patent: 3916278 (1975-10-01), Berger et al.
patent: 3939642 (1976-02-01), Morozumi
patent: 3958267 (1976-05-01), Fredericksen

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