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Circuit arrangement for generating a control signal in dependence upon the occurrence of an extreme value of a sinusoidal oscillation and use of such a circuit arrangement

  • US 5,126,745 A
  • Filed: 04/27/1990
  • Issued: 06/30/1992
  • Est. Priority Date: 05/05/1989
  • Status: Expired due to Term
First Claim
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1. A system for maintaining the sinusoidal oscillations of a resonance circuit comprising:

  • a diode for rectifying a sinusoidal oscillation;

    a storage element suitable for charging to an extreme voltage value of a sinusoidal oscillation through said rectifying diode;

    a discharge path for substantially discharging said storage element during the period of the sinusoidal oscillation;

    a switch element for furnishing a control signal as said storage element is being charged to said extreme voltage of the sinusoidal oscillation, and;

    a series circuit, comprising a resonant circuit and a controllable switch, said series circuit connected in parallel to said storage element, said control signal switching said controllable switch to a conductive position thereby supplying said resonant circuit with supply voltage.

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