Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-03-14
1996-07-23
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022722, 359139, B01J 134
Patent
active
055392016
ABSTRACT:
A multiple channel driver for fiber optic devices includes a source and an associated detector for each channel having processing circuitry and the power for the sources common to all channels. The system includes a master controller which has a precise time base to sequentially access each channel. The master controller is used to coordinate the multiple channels in a selected sequential manner. Synchronization of the channels avoids crosstalk since only one channel is on at a time. Power requirements are reduced since only one source is on at a time. The controller measures the background noise level, and subtracts it from the received signal. If the background noise level is too high, or the received signal too low, the master controller provides a warning. The controller also considers the signal history as an aid in locking onto signals and providing cleaner switching. For example, if a signal has been received at an initial threshold level on a channel, then the next time the channel is monitored the signal will be accepted at a lower threshold level.
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I/O: Smarter and more talkative by Peter Cleaveland I & CS-Dec., 1993.
Angermund Steve
Khan Farooq
Liva Michael
Nichols Steven L.
Pro-Optical Technologies, Inc.
Westin Edward P.
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