The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1980
Filed:
Sep. 28, 1979
Siemens Aktiengesellschaft, Berlin & Munich, DE;
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.