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:
Nov. 28, 2000
Filed:
Sep. 24, 1999
Takeshi Kawahara, Tokyo, JP;
Kurao Nakagawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A high-voltage power supply circuit receives ac input, effects rectification and successive multiplication, and outputs a high dc voltage. The high-voltage power supply circuit includes a plurality of diode bridges connected to a secondary winding of a transformer, in series by way of capacitors, that effect full-wave rectification of an ac voltage outputted from the secondary winding. The high-voltage power supply circuit further includes a plurality of capacitors provided for each of the diode bridges that accumulate charges from the output voltage that has undergone full-wave rectification. Voltage that is a multiple of the maximum value of the ac voltage within the secondary winding and the number of stages of diode bridges (an integer multiple) is outputted at each of the connection points of the diode bridges.