| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect currents running through a solenoid by a simple circuit at the time of carrying out dither current control. SOLUTION: An OR gate 48 operates the logical sum of a signal (a) of 100Hz for carrying out dither current control, and a signal (d) of 10kHz whose on-width is narrower than that of a signal (b), and outputs a signal (e) as the result to an AND gate 47. The AND gate 47 operates the logical product of the signal (e) outputted from the OR gate 48 and the signal (b) of 10kHz for controlling currents running through a solenoid 41 outputted from a CPU 49, and outputs a signal (f) as the result to the gates of MOS transistors 42 and 44. COPYRIGHT: (C)2004,JPO&NCIPI
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