One of the main advantages of using a thyristor as a switch in a DC circuit is that it has a very high current gain. The thyristor is a current operated device because a small Gate curren… See more

The Gate-cathode resistor RGK is generally included to reduce the Gates sensitivity and … See more

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 D1 which prevents reverse bia… See more

If switch S1 is closed, at the beginning of each positive half-cycle the thyristor is fully OFF but shortly after there will be sufficient positive trigger voltage and therefore current pres… See more