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Power supply circuit with standby arrangement

  • US 5,341,085 A
  • Filed: 05/27/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 07/03/1992
  • Status: Expired due to Fees
First Claim
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1. A power supply circuit comprising:

  • an input terminal and a reference terminal for connection of a direct voltage source to the input terminal and the reference terminal means for connection of a load to an output terminal and the reference terminal, a series arrangement of an inductive element and a diode connected to one another at a first node with the inductive element connected between the input terminal and the first node and the diode being connected between the first node and the output terminal, a first electronic switch having a main current path connected between the first node and the reference terminal, and a drive circuit for periodically making the main current path of the first electronic switch conductive and non-conductive, characterized in that the drive circuit comprises a first switching device for making the main current path of the first electronic switch permanently non-conductive in response to a standby signal, and a second electronic switch having a control electrode, and a first and a second main electrode which constitute a main current path connected in parallel with at least the diode of the series arrangement of the inductive element and the diode, and a second switching device for making the main current path of the second electronic switch permanently conductive in response to the standby signal.

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