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BI-DIRECTIONAL THYRISTORING GATING CIRCUIT

IP.com Disclosure Number: IPCOM000022981D
Original Publication Date: 1976-Jun-30
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

Previous methods of controlling AC loads through TRIACS used optically coupled devices to gate the TRIACS with low level logic signals. The optical couplers are unidirec~ tional and, therefore, gate voltage must always be of one polarity. This results in a gate voltage which must be out of phase with the TRIAC main terminal voltage for at least7T radians.