Gas leak prevention circuit of gas alarm

摘要

The present invention relates to a gas leak detection circuit of a gas alarm, and in the related art, since a sensor signal directly enters an integrated device (IC) such as a comparator, it is unprotected against fine noise, thereby causing a malfunction. Since the high level region of an integrated device such as a NAND gate is wide, the compensation time for instability due to the initial power supply of the sensor is not constant, and thus there is a problem that sufficient compensation may not be achieved in some cases. Therefore, the present invention makes it possible to adjust the compensation time for sensor instability at the initial power-on well, and to give a color change during gas detection and non-detection using dual LEDs.