Power supply with blocking oscillator - supplies AC signal to primary from secondary circuit without extra transformer

摘要

The power supply has one end of the primary winding (14) of a transformer (12) connected via a coupling capacitor (19) to a diode (15) connected in reverse bias to the output terminal (D) of the dc output voltage (UA) being regulated to a fraction of this output voltage. A chopper switch (25) is connected in parallel with the series circuit comprising coupling capacitor and primary winding. A high-ohmic dc source (26) is connected in parallel with the chopper switch, A rectifier is connected to the transformer's secondary winding and is designed as a voltage doubler with peak rectification.