Plural output switched current amplifier as for driving light em

Details Plural output switched current amplifier as for driving light em Plural output switched current amplifier as for driving light em

1980-05-27

1983-11-22

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340753, 340761, 307270, 330278, 330307, G09G 300

Patent

active

044172400

ABSTRACT:
A plural-output switched current source, as may be used to provide current drive to inidividual display segments of an LED display. Each respective current source output is selectively operable from a respective low level I.sup.2 L signal source. Means are provided to reduce the tendency of the selective operation of one LED display segment to affect the brightness of the remaining LED display segments.

REFERENCES:
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patent: 4103246 (1978-07-01), Limberg
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patent: 4160944 (1979-07-01), Ahmed
patent: 4177392 (1979-12-01), Haferl
patent: 4234805 (1980-11-01), Carlsen
patent: 4289977 (1981-09-01), Powers et al.
patent: 4291242 (1981-09-01), Schriber
Handbook of Semiconductor Electronics, Hunter; 3rd Ed.; McGraw-Hill.

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