Cascaded multiplying current mirror driver of led's

Details Cascaded multiplying current mirror driver of led's Cascaded multiplying current mirror driver of led's

G - Physics

08

C

G08C 23/04 (2006.01) G05F 3/26 (2006.01) H03K 17/60 (2006.01) H04B 10/155 (2006.01)

Patent

CA 2156947

A circuit for driving light emitting diodes with a precise amount of current in response to an input pulse is disclosed. The input pulse drives a transistor into saturation, and the collector current of this transistor is increased in value through the use of two cascaded multiplying current mirrors. The second current mirror directly drives the light emitting diodes.

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