Abstract
Abstract : An array of 24 field-effect transistors (FETs) is being used to switch a nominal4-kV, 1-microsecond pulse onto a Metglas induction core at pulse rates exceeding 100kHz. Each transistor receives isolated gate power from a dc/dc converter and analog pulse control via an optical fiber. The array is part of a specialized circuit architecture that generates bursts of pulses while providing for core reset between pulses. The circuit will accommodate variations in pulse width, repetition frequency (prf), pulse amplitude, burst length and reset interval. The various circuit elements are assembled directly onto the core structure to yield a compact, low-impedance package. Two prototype machines are presently under development. A 24- FET machine is in operation and capable of 4.2-kV, 1-microsecond pulses (max.) at a 120-kHz prf for short bursts. Pulse rise and fall times are 25 ns and 65 ns respectively. A 128-FET machine is under construction which should be capable of 6-kV, 1-microsecond pulses (max.) at a 150-kHz prf for long bursts.
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