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HOURS_OF_DELAY

2014-11-26 17:06  
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HOURS_OF_DELAY
Capacitor starts charging from -12 v to +12 v when switch is opened.Diode begins conducting at ground potential, and operational trigger trips when diode passes 2 na. Timing accuracy is high.-P. Lefferts, Operational Trigger For Precise Control, Electronics, 37:28, p 50-55.