| 摘要 |
PCT No. PCT/JP80/00033 Sec. 371 Date Nov. 4, 1980 Sec. 102(e) Date Nov. 4, 1980 PCT Filed Feb. 28, 1980 PCT Pub. No. WO80/01946 PCT Pub. Date Sep. 18, 1980.A combustion control circuit including semiconductor integrated circuits used for control of a combustor or burner of a water heater, air heater-blower or the like has a very simple configuration for stable initialization against the transient condition of a source voltage. A logic gate performs a sequence control. An input interface section applies a signal to the logic gate in response to an input signal required for combustion control. An output interface section converts the signal produced from the logic gate into a combustion control signal. An operation start signal from an operation switch or a temperature detector circuit is used in combination with an initialization signal for the combustion control circuit. The circuit part associated with the operation start signal making up part of the input interface section is responsive to a higher voltage level supplied from the voltage source during initial operation of the circuit than the logic gate circuit, thus assuring stable initialization without any external parts.
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