| 摘要 |
A circuit and method for reducing power consumption during operation of a solid state switch that controls connection of a source of alternating current to a load includes a circuit for determining a voltage across the switch. The switch is operated upon receipt of both a command signal and an indication that the voltage across the switch is less than a predetermined value. When used in a telephone system subscriber line interface circuit (SLIC), the circuit controls two switches that connect an ac ring signal from an ring generator to a telephone. The voltage sensed across the switch may be converted to a low current level and the circuit embodied in an integrated circuit.
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