Radiant energy – Photocells; circuits and apparatus – Signal isolator
Patent
1992-06-26
1993-06-22
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Signal isolator
307311, H01J 4014, G02B 2700, H03K 342
Patent
active
052218473
ABSTRACT:
A solid-state relay with delayed turn-on time without substantially increasing the time to bring the relay to full conduction after the delay. A current limiter disposed in series with photodiode array limits current therefrom to delay turn-on until the gate voltage of the output transistors is approximately the threshold voltage thereof. Once the threshold voltage is reached, the current limiter is bypassed so that the photodiode array provides full current to quickly turn-on the output transistors.
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AT&T Bell Laboratories
McLellan Scott W.
Messinger Michael
Nelms David C.
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