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Power supply based on normally parasitic resistance of solid state switch

  • US 5,132,890 A
  • Filed: 01/09/1991
  • Issued: 07/21/1992
  • Est. Priority Date: 01/09/1991
  • Status: Expired due to Term
First Claim
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1. A switching power supply comprising:

  • a resonant tank including an inductor-capacitor pair, and having an output level which is capable of varying;

    means for supplying an energy input to said tank;

    solid state switching means for controlling said energy input to said tank;

    means for providing a threshold signal; and

    means for comparing a signal from said switching means, said signal originating from and caused by an inherent internal resistance within said switching means, with said threshold signal and thereby determining the time at which the switching means is closed and the switching means signal level at which the switching means is opened.

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