High frequency pulse generating circuit
AssigneeMars, Incorporated
InventorJohn French
Life of this patent
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Abstract
A circuit for generating high frequency output pulses comprising a magnetron, a pulse transformer having its secondary winding coupled to apply firing pulses across the input terminals of the magnetron, charge storage means connected in circuit with the primary winding of the pulse transformer, and switching means for discharging the charge storage means through said primary winding to generate a firing pulse from said secondary winding, said switching means comprising an FET switching device having output terminals connected in series with said primary winding, and a control terminal, and a control circuit adapted to deliver low voltage (e.g. less than 20 volts) pulses to said control terminal.
Claims9
A circuit for generating high frequency output pulses comprising a magnetron having input terminals, a pulse transformer having primary and secondary windings, the secondary winding being coupled to the magnetron input terminals to apply firing pulses thereto, capacitive charge storage means arranged for direct discharge through the primary winding of the pulse transformer, a semiconductor switching device having output terminals which are connected in series with said primary winding and having a control terminal, and a control circuit adapted to deliver to said control terminal pulses of predetermined length, the semiconductor switching device being responsive to a said pulse at its control terminal to conduct and discharge the charge storage means through the primary winding of the pulse transformer for a period determined by the length of said pulse whereby a firing pulse and a resulting high frequency output pulse are generated which have pulse lengths also determined by the length of said pulse.
Dependencies are inferred from the claim text.