Title: Circuitry for reducing thyristor turn-off times

Abstract: A circuit for reducing thyristor turn-off time includes a thyristor connected between a power source and a load. A voltage source is connected between the anode and the cathode of the thyristor for applying across the anode and the cathode of the thyristor, upon actuation of a switch, an electrical signal sufficient to block the forward current of the thyristor. A rectifier and an impedance connected between the gate and the cathode of the thyristor cause a reverse current to flow in the gate of the thyristor upon application of the voltage source.

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Inventors: Kumano, Masayoshi (Amagaski, JA)

Application Number: 481186
Filing Date: 1974-06-20
Publication_date: 1976-03-09
Assignee: Mitsubishi Denki Kabushi Kaisha (Tokyo, JA)
Primary Class(es): 363/124 327/440, 327/582
Other Classes:
US Patent Ref:

3353032	Nov, 1967	Morgan et al.	307/252.
3404293	Oct, 1968	Harris et al.	307/252.
3501650	Mar, 1970	Phoenix	307/252.
3544818	Dec, 1970	Harris	307/305.
3667021	May, 1972	Anderson et al.	321/45.
3846644	Nov, 1974	Takagi et al.	307/252.

Other Refs:
Primary Examiner: Shoop, William M.
Assistant Examiner:
Attorney: Oblon, Fisher, Spivak, McClelland & Maier