| 摘要 |
PURPOSE:To improve the instantaneous lead regulation of a high voltage circuit by detecting the inflow current of a stepdown type switching current, generating a square wave in which a duty ratio is changed base on the value of the current, and supplying a stepdown type switching power source. CONSTITUTION:A current detecting circuit 1 detects a source current supplied from a power circuit 14 to a stepdown type switching power source 3, and the detected current is supplied to a stepdown type switching power source driving signal generating circuit 2. The driving signal generating circuit 2 outputs a pulse in a rectangle shape in which the duty ratio is changed according to the intensity of the detected current. The pulse is supplied to the stepdown type switching power source 3, and an output voltage is controlled. |
