Optical transmitter

Details Optical transmitter Optical transmitter

2007-11-20

2007-11-20

Sedighian, M. R. (Department: 2613)

Optical communications

Transmitter

C398S197000, C372S029014, C372S029015, C250S205000

Reexamination Certificate

active

10496687

ABSTRACT:
The present invention is intended to prevent a light-emitting diode from emitting light continuously in the case when the level at an input terminal is fixed high because of software or the like and to avoid various problems, such as battery exhaustion and breakdown of the light-emitting diode, in PDAs, cellular phones, etc. For these purposes, a high-pass filter21for passing the high-frequency components of an optical transmission input signal having a pulse waveform and a binary circuit22for binarizing the output signal of the high-pass filter21so as to be returned to a pulse waveform are provided in the preceding stage of a light-emitting device driving circuit23for driving a light-emitting diode8for optical transmission.

REFERENCES:
patent: 60264130 (1985-12-01), None
patent: 10013344 (1998-01-01), None
patent: 10-284783 (1998-10-01), None
patent: 10284783 (1998-10-01), None
PCT International Search Report dated Mar. 11, 2003.

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