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Constant current r.f. generator

  • US 4,626,767 A
  • Filed: 12/21/1984
  • Issued: 12/02/1986
  • Est. Priority Date: 12/21/1984
  • Status: Expired due to Term
First Claim
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1. A voltage source for producing a constant output voltage at radio frequencies in the presence of large voltage standing wave ratios comprising,a field effect transistor having at least a gate and a drain,means for applying a radio frequency signal to said gate,means for applying a voltage to said drain including a transformer having a first winding in series with said drain,said field effect transistor having an output circuit including a second winding of said transformer, andmeans for applying a first d.c. voltage to said first winding remote from said drain to produce operation of said field effect transistor in its saturated region for Class C operation, andmeans for varying the voltage applied to the said first winding remote from said drain to provide a constant amplitude output voltage at the output of said second winding.

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