Modulator and clamper for variable impedance load

Details Modulator and clamper for variable impedance load Modulator and clamper for variable impedance load

1975-09-29

1977-05-17

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

307237, 315207, 315244, 315310, 328171, H03K 508

Patent

active

040244300

ABSTRACT:
A transformerless Blumlein type circuit is combined with a novel clamper circuit for driving a cold cathode electron beam gun for a CO.sub.2 laser where the E-beam gun has resistance essentially infinite at the leading end of a driving pulse and has several ohms resistance at the end of the driving pulse. At the leading end of a driving pulse the voltage output of the Blumlein circuit is twice the rated load voltage since the load as infinite impedance. The clamper circuit limits the pulse voltage across the load to its rated voltage and the excess power from the Blumlein circuit over that required by the load is dissipated in the clamper circuit. The clamper circuit as variable impedance that is approximately the inverse of the load impedance during a driving pulse so that the Blumlein circuit looks into an approximately constant impedance equal to its impedance.

REFERENCES:
patent: 2947884 (1960-08-01), Horodyski
patent: 3051906 (1962-08-01), Haynes
patent: 3185928 (1965-05-01), Coyle
patent: 3337755 (1967-08-01), Grabowski et al.
patent: 3394284 (1968-07-01), Hurkamp et al.
IEEE International Electron Devices Meeting, 12, 1974, pp. 173-176 High Vage Modulator for E-Beam Guns and Megawatt Average Power Switches for Sustainer Discharges.
The Dept. of Defense Laser Conference, 10, 1974, pp. 279-281 and p. 300 Repetitively Pulsed, Cold Cathode E-Beam, Self-Switching Laser Electronic Design 17, Aug. 16, 1969, pp. 190-193.

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