| 摘要 |
PURPOSE:To reduce the number of connecting wires between respective devices to each other by using a clamp pulse as a control signal for controlling a power supply. CONSTITUTION:When an image signal regenerating device 10 is set in a working state, then a pulse generating circuit 108 provides a clamp pulse CP to the base of a transistor 110. The clamp pulse CP of output to be outputted to a connecting wire 44 from the collector of the transistor 110 is reversed and inputted to a low-pass filter 212. In the low-pass filter 212, the clamp pulse CP is integrated, and an integrated output Vi is inputted to a comparator 214. As a result, an analog switch 208 is set in an ON-state, and by a regulator 216, line voltage VCC is fed to signal processing circuits, 200, 202. Then, a number of connecting wires can be reduced. |
