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US 10,433,380 B2Granted
Triac driving circuit and fixing apparatus having resistive elements in series with different characteristics for circuit protection
AssigneeCanon Kabushiki Kaisha
InventorsYusuke Nakashima, Takao Kawazu, Tetsuya Yamamoto
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Abstract
A triac driving circuit according to an embodiment of the present disclosure includes a phototriac coupler, a first resistive element, and a second resistive element, which are connected in series to a gate terminal of a triac. A minimum resistance of the first resistive element including tolerance is higher than a maximum resistance of the second resistive element including tolerance.
Claims14
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.
4 more elements
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 the first resistive element and the second resistive element have different heat capacities.
4 more elements
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 the first resistive element and the second resistive element are different in radiation performance.
4 more elements
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 the first resistive element and the second resistive element are different in temperature coefficient of resistance.
4 more elements
Dependencies are inferred from the claim text.