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. 16, 2009
Filed:
May. 29, 2007
Mineo Noguchi, Tokyo, JP;
Mineo Noguchi, Tokyo, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
An output signal ZA of NANDis given to a first input of NANDand is given to a second input of the above NAND, simultaneously through a delay circuit. Furthermore, an output signal ZB of the NANDis given to the first input of NANDand is given to the second input of NAND, simultaneously through a delay circuit. The delay circuit includes a charging and discharging circuit consisting of a NMOShaving the conductivity controlled by a voltage VN depending on a temperature signal from a temperature-dependent current sourceand a capacitor, and a NMOSbeing turned on/off by the voltage of the above capacitor. By setting temperature characteristics of the voltage VN and temperature characteristics of the threshold voltage of the NMOSso as to cancel each other, the oscillation frequency variation of the oscillation circuit consisting of astable multi-vibrators can be restrained.