US Patent No. 10,433,380

TRIAC DRIVING CIRCUIT AND FIXING APPARATUS HAVING RESISTIVE ELEMENTS IN SERIES WITH DIFFERENT CHARACTERISTICS FOR CIRCUIT PROTECTION


Patent No. 10,433,380
Issue Date October 01, 2019
Title Triac Driving Circuit And Fixing Apparatus Having Resistive Elements In Series With Different Characteristics For Circuit Protection
Inventorship Yusuke Nakashima, Yokohama (JP)
Takao Kawazu, Susono (JP)
Tetsuya Yamamoto, Suntou-gun (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 10,433,380

1. A triac driving circuit comprising:a triac connected between an alternating current source and a load;
a phototriac coupler configured to transmit a signal to the triac;
a first resistive element; and
a second resistive element,
wherein the phototriac coupler, the first resistive element, and the second resistive element are connected in series to a gate terminal of the triac, and
wherein a minimum resistance of the first resistive element including tolerance is higher than the maximum resistance of the second resistive element including tolerance.