Title: Electrical thyristor circuit

Abstract: An electrical circuit comprising at least one thyristor having an anode, cathode and gate; an ignition circuit for applying an ignition signal between the gate and cathode of the thyristor when turning on the thyristor; a turn-off circuit for turning off the thyristor which applies a reverse voltage between the anode and cathode of the thyristor when turning off the thyristor and which comprises an inverse bias circuit; said inverse bias circuit comprising a first path across the gate and cathode of the thyristor and a second path acrosss the gate and anode of the thyristor; and said bias circuit applying a reverse bias voltage having opposite polarity to the ignition signal between the gate and the cathode of the thyristor.

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Inventors: Iwamoto, Hideo (Itami, JA)

Application Number: 478512
Filing Date: 1974-06-12
Publication_date: 1976-02-10
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JA)
Primary Class(es): 363/124 327/473
Other Classes:
US Patent Ref:

3328668	Jun, 1967	Nolan et al.	321/45.
3374414	Mar, 1968	Garnett	321/45.
3404293	Oct, 1968	Harris et al.	307/252.
3594629	Jul, 1971	Kawakami et al.	321/45.
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