Ttl compatible led driver circuit

Details Ttl compatible led driver circuit Ttl compatible led driver circuit

H - Electricity

04

B

325/1

H04B 10/155 (2006.01) H03K 17/0416 (2006.01)

Patent

CA 1113543

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 gate controlled by the input digital signal such that the current may be selectively shunted around the LED.

313548

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