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Ultra-low voltage boost circuit

  • US 8,411,467 B2
  • Filed: 04/21/2010
  • Issued: 04/02/2013
  • Est. Priority Date: 12/12/2007
  • Status: Active Grant
First Claim
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1. An apparatus for converting a low magnitude voltage from a voltage source to a higher magnitude voltage comprising:

  • a) a transformer having a high voltage secondary side with a high number of turns, a first low voltage primary side with a low number of turns wound in one direction and .a second low voltage primary side with a low number of turns wound in the opposite direction;

    b) one or more N-channel transistors that are in electrical series with said voltage source and said first low voltage primary side of said transformer that controls electrical current flow through said first low voltage primary side of said transformer;

    c) one or more P-channel transistors that are in electrical series with said voltage source and said first low voltage primary side of said transformer that controls electrical current flow through said second low voltage primary side of said transformer;

    d) control lines for said one or more N-channel transistors and said one or more P-channel transistors that are connected through resistors to said high voltage secondary side of said transformer; and

    e) a rectifying circuit that takes a cyclically varying voltage from said high voltage secondary side of said transformer and converts it to a DC voltage;

    whereby the use of two primary side windings allows power to be drawn from said voltage source during positive and negative half cycles of oscillation.

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