Switched capacitor current reference

Details Switched capacitor current reference Switched capacitor current reference

1993-06-25

1995-04-18

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

323316, 323907, G05F 326

Patent

active

054081742

ABSTRACT:
A current reference using a switched capacitor to produce a substantially temperature invariant output current. Charge subtracted from a relatively large capacitor by a much smaller switched capacitor at a chosen rate substantially determines the output current of the reference. The output current is proportional to the product of a reference voltage, the capacitance of the switched capacitor and the switching frequency.

REFERENCES:
patent: 4484089 (1984-11-01), Viswanathan
patent: 4520283 (1985-05-01), Sasaki et al.
patent: 4521743 (1985-06-01), Heimer
patent: 4714843 (1987-12-01), Smith
patent: 4970415 (1990-11-01), Fitzpatrick et al.
patent: 5124593 (1992-06-01), Michel
patent: 5166630 (1992-11-01), Lee
patent: 5168179 (1992-12-01), Negahban-Hagh

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