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:
May. 12, 2009
Filed:
Apr. 18, 2006
Yusuke Kanno, Kodaira, JP;
Kazuo Tanaka, Hachioji, JP;
Shunsuke Toyoshima, Higashimurayama, JP;
Takeo Toba, Higashimurayama, JP;
Yusuke Kanno, Kodaira, JP;
Kazuo Tanaka, Hachioji, JP;
Shunsuke Toyoshima, Higashimurayama, JP;
Takeo Toba, Higashimurayama, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A semiconductor integrated circuit device including an I/O circuitry capable of low-voltage high-speed operation at low cost is provided. In the I/O circuitry, when an I/O voltage (for example, 3.3 V) is lowered to a predetermined voltage (for example, 1.8 V), portions causing a speed deterioration are a level conversion unit and a pre-buffer unit for driving a main large-sized buffer. In view of this, a high voltage is applied to a level up converter and a pre-buffer circuit. By doing so, it is possible to achieve an I/O circuitry capable of low-voltage high-speed operation at low cost.