| 摘要 |
PURPOSE:To realize the independent stabilization only for the output to be stabilized, by turning on and off a switching transistor with a certain timing and at the same time providing a regulator at the output side. CONSTITUTION:A transformer T3 is set to an AC power supply 1 in parallel to a full-wave rectifier 2, and a timer IC3 is set at the secondary side of the transformer T3. A transistor (TR)Q2 is turned on and off by the timer IC3 with a constant frequency duty. As a result, a TRQ1 turns on and off a primary coil of a transformer T1 via a transformer T2 with the timing decided by the timer IC3. Thus the voltage is induced at the secondary coils n2-n4 in accordance with the turn ratio. This induced voltage of high output accuracy is delivered via a rectifying circuit consisting of a capacitor input and then the regulators IC1 and IC2. In such way, only the output to be stabilized can be stabilized independently. |
