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:
Feb. 16, 2010
Filed:
Jan. 11, 2007
Tomoyuki Yamase, Tokyo, JP;
Tadashi Maeda, Tokyo, JP;
Tomoyuki Yamase, Tokyo, JP;
Tadashi Maeda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A variation of a threshold of diode-connected transistors is compensated for to maintain a constant rectification efficiency of a rectifier circuit, thereby enabling stable detection of a start signal. A constant voltage is applied to DC bias terminalof cascaded half-wave voltage doubler rectifier circuits (including MOS transistors Mto Mand capacitors Cto C) forming a rectifier circuit, and a voltage equal to the sum of the constant voltage applied to DC bias terminaland a variation ΔVt of a threshold voltage of the MOS transistors is applied to DC bias terminalof cascaded half-wave voltage doubler rectifier circuits (including MOS transistors Mto Mand capacitors Cto C) forming a bias circuit.