Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1986-09-19
1988-10-11
Moore, David K.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 393, 315 94, H01J 2534
Patent
active
047774061
ABSTRACT:
A power supply for helix and collector electrodes of a traveling wave tube is driven by an AC power source having a frequency of at least 500 KHz. The helix supply includes plural, stacked voltage doubler AC to DC modules responsive to the 500 KHz source. The collector supply includes plural AC to DC modules, each having a diode full wave rectifier bridge, connected in stacked relation. Each of the modules includes a transformer with a ferrite, toroidal core dimensioned so that it is not driven into saturation by the 500 KHz source. Each module also includes inexpensive, signal switching diodes having a recovery time of approximately 4 nanoseconds. The ratio of the collector to helix DC voltages is maintained constant by threading a common lead through the apertures of the toroidal cores of the helix and collector modules. A separate common lead threaded through the apertures of the toroidal cores in the collector modules is connected directly to the 500 KHz power source. A feedback circuit responsive to the helix-cathode voltage of the TWT controls the helix power supply voltage precisely.
REFERENCES:
patent: Re28782 (1976-04-01), Caldwell et al.
patent: 3092750 (1963-06-01), Haus et al.
patent: 3760219 (1973-09-01), DeSantis
patent: 4370607 (1983-01-01), Dassonville
patent: 4393441 (1983-07-01), Enge
patent: 4641229 (1987-02-01), Easter
Gunn Bradley
Ross Randall I.
Cole Stanley Z.
Fisher Gerald M.
Moore David K.
Powell M.
Sgarbossa Peter J.
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