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DC to DC converter

  • US 4,263,642 A
  • Filed: 03/28/1979
  • Issued: 04/21/1981
  • Est. Priority Date: 03/28/1979
  • Status: Expired due to Term
First Claim
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1. In a DC to DC converter having a transformer with a primary winding and a secondary winding, a pair of input capacitors for serial connection across a supply of input potential, switching means for causing current to flow selectively in opposite directions through the primary winding, a pair of diodes for limiting the voltage across the primary winding, a load, voltage rectifier means connecting the load to the secondary winding, and means responsive to the output across the load for controlling the switching means, the improvement comprising:

  • a two stage filter connected between the input capacitors and one side of the primary winding, the filter being tuned to a first frequency, equal to the desired switching rate of the switching means and to a second frequency equal to the third harmonic of the first frequency.

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