Ic Magnetic Vibrator Feeder

The above thyristor firing circuit is similar in design to the dc scr circuit except for the omission of an additional off switch and the inclusion of diode d 1 which prevents reverse bias being applied to the gate during the positive half-cycle of the sinusoidal waveform, the device is forward biased but with switch s 1 open, zero gate current is applied to the thyristor and it remains.

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