Electronic switch
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United States of America Patent
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-
Mar 17, 1987
Grant Date -
N/A
app pub date -
May 29, 1985
filing date -
May 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic switch has a pair of light dependent resistors forming part of a potential divider with the hysteresis of the circuit being high enough to prevent equally applied changes in light level from effecting the switch action. The divider controls the voltage to an operational amplifier which is switched off by covering the other resistor. The switch may be combined with an opto-isolator or a relay to control power circuits.
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