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Electrical apparatus supplied by a photo-voltaic power source

  • US 6,118,258 A
  • Filed: 12/17/1997
  • Issued: 09/12/2000
  • Est. Priority Date: 01/09/1997
  • Status: Expired due to Term
First Claim
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1. An autonomous low power consumption electrical apparatus capable of being connected to a load, this apparatus having a supply device comprising a power source operating by photo-voltaic conversion, an electrical accumulator connected to said load, and a voltage booster connected between said power source and said accumulator for charging said accumulator, said source supplying a voltage which is not sufficient for operating said load, said voltage booster being controlled by a pulse signal having a predetermined frequency supplied by a first generator when the voltage of the accumulator is not sufficient, said first generator being connected to said power source, wherein said first pulse signal generator comprises an oscillator directly connected to said power source and arranged so as to operate at a voltage equal to or less than the voltage supplied by said photo-voltaic source.

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