| 摘要 |
PURPOSE:To make a control circuit simple and inexpensive, by using the voltage to be controlled of a switch regulator, for the electric power supply for charging a capacitor of integrating circuit, in an astable multivibrator which has used a comparator. CONSTITUTION:The primary rectifying voltage E which has rectified commerical AC 100V by a rectifying diode 1 is monitored by an on-time controlling circuit 8, which controls so that in case when said voltage E has been raised, on-time of a switching transistor 3 is shortened, and in case when a DC output Etheta has been lowered, on-time of the switching transistor 3 is extended. DC output voltage is stabilized by operation of said on-time controlling circuit. |
