X-ray diagnostic generator

Details X-ray diagnostic generator X-ray diagnostic generator

1979-09-28

1980-12-09

Church, Craig E.

Radiant energy

With charged particle beam deflection or focussing

With target means

250408, 250421, H05G 130

Patent

active

042386810

ABSTRACT:
In an exemplary embodiment, a bridge rectifier is coupled with the primary circuit of the high voltage transformer. In the d.c. current branch of the bridge rectifier, a smoothing capacitor and a thyristor are arranged. The thyristor is turned on and off with a pulse duty cycle which determines the capacitor voltage and hence the x-ray tube voltage. At the thyristor, an LC-oscillatory circuit is connected whose capacitance when the thyristor is conductive, is discharged via the latter and which effects the extinction of the thyristor via a free-running diode which is conductive in return oscillation phase and which is disposed parallel to the thyristor. In this manner, a high switching frequency of the thyristor and hence a minimal ripple of the x-ray tube voltage can be achieved.

REFERENCES:
patent: 3846633 (1974-11-01), Romandi
patent: 4063099 (1977-12-01), Grassme

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