Reference current supply circuits

Details Reference current supply circuits Reference current supply circuits

1979-12-10

1981-08-04

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323312, G05F 156

Patent

active

042824788

ABSTRACT:
A current flows between the collector and emitter electrodes of a transistor responsive to an operating potential being impressed between them, the emitter-base junction of the transistor being forward biased by leakage current flowing across its own collector-base junction. Increase of the current flow between the collector and emitter electrodes of the transistor beyond a desired level is precluded by sensing the current flow, applying the sensed current to a current-to-voltage converter, and applying the resultant voltage to the input of a threshold detector. The output circuit of the threshold detector shunts current away from the emitter-base junction of the transistor when the current flow between its collector and emitter electrodes tends to exceed its desired level thereby to cause the voltage applied to the input circuit of the threshold detector to exceed a predetermined threshold value.

REFERENCES:
patent: 3246233 (1966-04-01), Herz
patent: 3588672 (1971-06-01), Wilson
patent: 3761801 (1973-09-01), Sheng
patent: 3903454 (1975-09-01), Matsui et al.
patent: 3906332 (1975-09-01), Keller

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