| 摘要 |
PURPOSE:To obtain the switching period and the dead time without using any logic circuit, by providing a free running multivibrator having a pair of transistors plus two specific capacitors, etc. CONSTITUTION:A free running multivibrator contains the 1st and 2nd switching transistors (TR)Q1 and Q2 which are connected in a push-pull way to generate the energizing current to a transformer T1 plus a pair of TRQ3 and TRQ4. The 1st capacitor C1 is connected between the base of the TRQ1 and the collector of the TRQ4, and the 2nd capacitor C2 is connected between the base of the TRQ2 and the collector of the TRQ3. Thus an insulated switching power supply circuit using the transformer T1 is obtained. |
