| 摘要 |
A load insensitive power supply includes an output circuit normally connected to a load for receiving power from the power supply and an input circuit for connection across an AC power supply source alternately having first and second 180.degree. half-cycles of operation. A transformer is provided having a primary winding connected across the input circuit and including first and second seriesconnected secondary windings having a common junction. A filter choke is connected in series between the junction and the output circuit. A first bi-directional switch serves, when ON, to connect the filter choke and the firstsecondary winding in a first series circuit with the output circuit, permitting bi-directional current flow therethrough. A second bi-directional switch serves, when ON, to connect the filter choke and the second secondary winding in a second series circuit with the output circuit for bi-directional current flow therethrough.
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