| 摘要 |
PURPOSE:To automatically and instantly execute a gain adjustment by providing a means for detecting a lamp terminal voltage, a means for performing the analog/digital conversion of this detected value, and a means for calculating a phase angle from this analog/digital converted value and a control target value. CONSTITUTION:The gain adjustment is automatically executed by the loop, a voltage control amplification circuit 5 an A/D converter 8 an automatically set routine 12 a D/A invertor 9 the voltage control amplification circuit 5. That is, a gain G is calculated by the automatically set routine 12 from the digital value VF of a voltage squared integrated value VL and a digital value DF previously set, is D/A inverted, and is outputted to the voltage control amplification circuit 5. The gain (g) of the voltage control amplification device 5 is automatically adjusted by repeating this loop. Thus, the gain adjustment is automatically and instantly executed only by turning on a power source at the time of finishing the assembly of a copying machine. |
