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:
Jun. 29, 2004
Filed:
Dec. 21, 2001
Shigeki Yagi, Chiba, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
An electric discharge detection circuit includes an x-ray tube, a power supply that applies a high voltage to the x-ray tube, a tube voltage that detects the voltage applied to the x-ray tube, a differentiation circuit that differentiates a signal output from the tube voltage detector, a zero-crossing comparator that discriminates the polarity of an output signal from the differentiation circuit; a re-triggerable one-shot pulse generating circuit that generates one-shot pulses at a regular period, using the pulse output from zero-crossing comparator as the trigger, a counter that is input with the one-shot pulse output and counts the pulses to output from the zero-crossing comparator while operation is enabled period, an x-ray cut-off circuit that terminates the generation of high voltage when it receives the carry output and a display that displays the occurrence of an electric discharge phenomenon upon receipt of the carry output.