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:
Oct. 11, 2005
Filed:
May. 02, 2003
Tadaaki Yamauchi, Hyogo, JP;
Junko Matsumoto, Hyogo, JP;
Takeo Okamoto, Hyogo, JP;
Makoto Suwa, Hyogo, JP;
Tetsuichiro Ichiguchi, Hyogo, JP;
Hideki Yonetani, Hyogo, JP;
Tsutomu Nagasawa, Hyogo, JP;
Zengcheng Tian, Hyogo, JP;
Tadaaki Yamauchi, Hyogo, JP;
Junko Matsumoto, Hyogo, JP;
Takeo Okamoto, Hyogo, JP;
Makoto Suwa, Hyogo, JP;
Tetsuichiro Ichiguchi, Hyogo, JP;
Hideki Yonetani, Hyogo, JP;
Tsutomu Nagasawa, Hyogo, JP;
Zengcheng Tian, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A manner of generating internal voltages such as a high voltage, an intermediate voltage and an internal power supply voltage is switched in accordance with a power supply level setting signal. When the voltage level of an external power supply voltage is low, a current drive transistor receiving an output of a comparing circuit and an auxiliary drive transistor are forcedly set in a conductive state, and external power supply voltage is transmitted on an internal power supply line. At this time, the comparing operation of the comparing circuit is stopped. When the level of the external power supply voltage is high, the comparing circuit is activated down convert the external power supply voltage for generating a peripheral power supply voltage on the internal power supply line.