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AC-DC voltage regulator

  • US 3,982,173 A
  • Filed: 04/10/1974
  • Issued: 09/21/1976
  • Est. Priority Date: 04/10/1974
  • Status: Expired due to Term
First Claim
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1. An efficient voltage regulation network for converting an unregulated AC input voltage into a regulated DC output voltage across a load, said network comprising:

  • a. a series pass control element for conducting current a given portion of each cycle of AC input voltage coupled thereto,b. means connected to the output of said control element for detecting and filtering the output voltage thereof and providing a DC ripple voltage, said detection means disconnecting said control element from said load once each cycle of AC input voltage applied to said control element and preventing said control element from turning on more than one each cycle of AC input voltage applied thereto,c. means connected to the output of said control element for sensing the changes in voltage thereat and for generating a control potential at a control node, andd. means coupled between said control node and the input of said series pass control element and responsive to the voltage generated at control node for controlling the time during each cycle of AC input voltage that said series pass control element is conducting current to an output load, whereby said control element provides the required amount of output current for a varying load on said regulator and the latter, in turn, determines the varying level of voltage at the output of said series pass control element.

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