| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of terminal noise by a control means of controlling electrical energy supplied to a heater by PWM-driving a current flowing to the heater. SOLUTION: The ON/OFF frequency of a PWM signal is always varied. The switching timing is, for example, timing of zero crossing where positive-to-negative or negative-to-positive switching is performed. COPYRIGHT: (C)2007,JPO&INPIT
|
