| 摘要 |
PURPOSE:To realize a developing bias circuit which can automatically obtain a proper developing bias value according to an environmental temperature and further, vary a density to the desired one of a user by herself or himself. CONSTITUTION:A voltage compensating circuit composed of a D101 and an AMP102 is operated on a high-temperature side including an atmospheric temperature, and the voltage of a point is prevented from dropping than the value of a VC, to make an output voltage VB constant. Since a resistance value is made low as the temperature of a thermister (TH) becomes high, at a certain temperature or below, the output voltage is varied. Moreover, the output voltage VB is varied and restricted on the input side of a voltage amplifying circuit AMP101. |
