| 摘要 |
PURPOSE:To perform stable vibration by driving the base of a switching transistor in response to an input current. CONSTITUTION:A DC rectified from a commercial power source 5 via a full- wave rectifier is converted to AC voltage through an inverter oscillator 1. A load circuit 2 is connected to the output terminal of the oscillator 1. A current transformer CT is connected in series with the input line connected to the full- wave rectifier to detect the input current, and the output generated at the secondary coil is applied to the connecting point of the base resistors R1, R2 of transistors Q1, Q2 which switch of the oscillator 1 and the emitters through full-wave rectifier DB2, resistor R3 and condenser C1. The output of a feedback winding 4 is fed back to the bases of the transistors Q1, Q2. |
