BI-DIRECTIONAL THYRISTORING GATING CIRCUIT
Original Publication Date: 1976-Jun-30
Included in the Prior Art Database: 2004-Mar-27
Xerox Disclosure Journal
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.