Fail-safe electronic polarized relay
Fail-safe one and only one signal checking circuit
Fail-safe pulse providing apparatus
Failsafe electrical circuitry
Failsafe feedback control system
Failsafe logic function apparatus
Failsafe train vehicle control signal threshold detector apparat
Fast electronic comparator
Fast one way amplifier stage
Fast sample and hold circuit
Fast sample and hold circuit configuration
Fast sample and hold circuit configuration
Fast sense amplifier
Fast settling digital to analog converter bit switch
Fast settling digital to analog converter bit switch
Fast switching circuit for lateral PNP transistors
Fast switching Darlington circuit
Fast turn-off circuit for power transistor
Fast updating peak detector circuit
Fast-acting comparison circuit