Radiant energy – Ion generation – With sample vaporizing means
Patent
1981-03-09
1982-02-23
Smith, Alfred E.
Radiant energy
Ion generation
With sample vaporizing means
250409, 363 95, 336182, H05G 130, H05G 110
Patent
active
043170404
ABSTRACT:
A low ripple high voltage power supply and a filament transformer for use therewith in a dental X-ray system are disclosed. The power supply utilizes a rectifier and regulator circuit to provide a low voltage regulated DC signal, a DC-AC converter for providing a high-frequency chopped power signal suitable for efficient transformation to a high voltage, followed by a multiplier for generating the final high voltage signal to be applied to the X-ray tube. A high frequency clock circuit is used for driving the converter and also for controlling logic circuitry used to develop the regulator control signals. Both a voltage and a current control loop are utilized in the regulator control, and the tube anode current and filament current are controlled as a function of sensed anode current. The filament transformer is coaxially structured, employs a single turn secondary, and insures minimal high voltage stress areas within the tubehead of the X-ray system.
REFERENCES:
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patent: 3320477 (1967-05-01), Boeker
patent: 3863140 (1975-01-01), Easter et al.
patent: 3974387 (1976-04-01), Bronner et al.
patent: 4076996 (1978-02-01), Maehara et al.
patent: 4238683 (1980-12-01), Baumann
patent: 4246633 (1981-01-01), Borkovitz
Grigsby T. N.
Pennwalt Corporation
Smith Alfred E.
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