| 摘要 |
A solid state timer for controlling the duration of an A.C. excitation delivered to a load. A relay-tripped trigger pulse generator activates a rectangular waveform generator, whose adjustable duration output controls the gate of a silicon controlled rectifier. The rectifier controls a diode bridge circuit to switch a full wave excitation to the load for the duration of the rectangular waveform. The timer finds particular application in welding circuitry.
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