Patent ID: 6157258
Filing Date: 2000-12-05
Classification: H03F

Abstract:
An amplifier, with an instantaneous bandwidth of two-thirds of an octave in the middle high frequency RF spectrum between 3 MHz and 30 MHz and with greater than 80% power conversion efficiency, for producing a multiple kilowatt continuous wave amplitude RF signal while operating directly from a variable, high voltage, DC power source that provides between about 100 to 200 VDC depending on a selected power amplitude, comprising:a first group of two or more high conductivity, high breakdown voltage, discrete transistors connected substantially in parallel and isolated from each other by independent circuits connected at their input and output terminals; anda second group of two or more high conductivity, high breakdown voltage, discrete transistors connected substantially in parallel and isolated from each other by independent circuits connected at their input and output terminals, whereinsaid first group and said second group are combined so that each group conducts on opposite half cycles of an input RF signal, thereby permitting push-pull operation of the amplifier, andeach of said discrete transistors has a grounded drain, common source configuration.