| 摘要 |
PROBLEM TO BE SOLVED: To provide a smoke detector for decreasing a power supply voltage for operating an LED for detection, and for operating an amplifier circuit with much higher precision. SOLUTION: This smoke detector for controlling a light emitting element for smoke detection is provided with a reference potential generation circuit for generating a predetermined reference potential; a buffer circuit for reducing the output impedance of the reference potential generation circuit and a constant current supply circuit for supplying constant currents corresponding to a potential to be output by the buffer circuit to the light emitting element. COPYRIGHT: (C)2007,JPO&INPIT
|
