Cascaded multiplying current mirror driver for LED's

Details Cascaded multiplying current mirror driver for LED's Cascaded multiplying current mirror driver for LED's

1994-10-13

1997-12-23

Powell, Mark R.

Computer graphics processing and selective visual display system

Plural physical display element control system

Segmented display elements

G09G 300

Patent

active

057011338

ABSTRACT:
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.

REFERENCES:
patent: 4417240 (1983-11-01), Ahmed

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