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RF power amplifier system having an improved drive system

  • US 5,612,647 A
  • Filed: 06/30/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Fees
First Claim
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1. A RF power amplifier system, comprising:

  • a RF source for providing a train of RF pulses having a fixed frequency and wherein each pulse is of a fixed amplitude and duration;

    a DC voltage source;

    a bridge circuit including a first circuit including a first transistor switching means for, when on, connecting said DC voltage source across a load for DC current flow therethrough in a first direction and a second circuit including a second transistor switching means for, when on, connecting said DC voltage source across said load for DC current flow therethrough in a second direction;

    switch driver control means for, when enabled, passing said RF pulses for driving said first and second transistor switching means on and off at a frequency dependent upon that of said RF signal and in such a manner that current from said DC voltage source alternately flows in said first and second directions through said load;

    means for providing turn-on signals and selectively applying them to said switch driver control means for enabling said driver control means for passing said RF pulses to said switching means; and

    ,wherein said switch driver control means includes logic gating means enabled by said turn-on signal for passing said RF pulses to said first and second transistor switching means.

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