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Hold-up circuit with safety discharge for preventing shut-down by momentary power interruption

  • US 5,828,207 A
  • Filed: 04/20/1993
  • Issued: 10/27/1998
  • Est. Priority Date: 04/20/1993
  • Status: Expired due to Fees
First Claim
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1. In combination with a source of power, an electrical load connected to the source for operation at an operating voltage above a predetermined level, hold-up circuit means for maintaining said operation of the load during momentary interruption in power of the source, comprising:

  • power storage means connected to the load for supply of said operating voltage thereto, impedance means connected to the power storage means for regulating charge thereof and discharge thereof into the load during said interruption in power of the source and safety means responsive to a drop in voltage applied to the load from the source below said predetermined level for preventing continuation of said discharge of the power storage means into the load during said interruption in power of the source.

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