| 摘要 |
PURPOSE:To obtain a bias power source of simple constitution for development by providing a switching part for controlling the charging voltage of a CR charging circuit, and switching clock pulses for controlling it and thus controlling a set voltage output. CONSTITUTION:When a clock signal is applied from a clock generation part 1 to the base of a transistor TR1, a capacitor C is charged to a prescribed voltage with a time constant CR, and development is carried out by a development bias which corresponds to the clock. After the development, a signal is sent from the clock generation part 1 to a TR2, which turns on to discharge the charged capacitor C with a time constant CR'. Thus, a bias power source of simple constitution for development is obtained. |
