TTL Compatible LED driver circuit

Details TTL Compatible LED driver circuit TTL Compatible LED driver circuit

1977-11-10

1979-09-04

Griffin, Robert L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

307312, 315200R, 332 751, H04B 900, H01S 310

Patent

active

041669479

ABSTRACT:
A circuit is disclosed for use in optical fiber data communication systems which is compatible with TTL digital input signals and which drives a light emitting diode (LED) coupled to an optical fiber transmission link. A pulse shaping network is provided to couple current from a constant current source to energize the LED or to a bank of open collector NAND gates controlled by the input digital signal such that the current may be selectively shunted around the LED.

REFERENCES:
patent: 3258596 (1966-06-01), Green
patent: 3341708 (1967-09-01), Bilderback
patent: 3488586 (1970-01-01), Watrous et al.
patent: 3577017 (1971-05-01), Duke
patent: 3806762 (1974-04-01), Punis et al.
patent: 3968399 (1976-07-01), Jarrett

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