One oscillator drives multiple solid-state relays

摘要

Thanks to a combination of low initial cost and low on-resist-ance, a conventional electromechan-ical relay often makes sense for switch-ing large amounts of load current on and off and when proportional control of the load's current or voltage is un-necessary. Low cost and low on-resist-ance represent the main reasons that relays still enjoy widespread use in the industry. In addition, a relay remains useful for switching high-voltage ac under the control of low-voltage electronics, due to the high degree of isolation between the control and the load circuits.