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. 14, 2004
Filed:
Jun. 06, 2003
Hidetoshi Ozoe, Kanagawa, JP;
NEC Corporation, Kanagawa, JP;
Abstract
A reference voltage circuit includes three PMOS transistors and two NMOS transistors. The three PMOS transistors constitute a current mirror circuit and the two NMOS transistors constitute a load circuit. A dummy NMOS transistor is added to the load circuit so as to make three NMOS transistors correspond to the three PMOS transistors and a ratio of currents leaking through PN junctions of diffusion layers on the side of the current mirror circuit is set equal to a ratio of currents leaking through PN junctions of diffusion layers on the side of the load circuit. This allows the reference voltage circuit to output a reference voltage that does not change with temperature even at high temperatures.