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. 29, 2001
Filed:
Apr. 01, 1999
Koichi Morikawa, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
The present invention comprises first unit cells each including PMOS transistors and NMOS transistors, each transistor having a first threshold voltage, second unit cells each including PMOS transistors and NMOS transistors, each transistor having a second threshold voltage, a unit cell array comprised of the first and second unit cells laid in array form, a power switch disposed around the unit cell array and comprised of the PMOS transistors and NMOS transistors each having the second threshold voltage, and input/output circuits disposed around the unit cell array. Another invention comprises a first power supply line supplied with a first power supply potential level, a second power supply line supplied with a second power supply potential level, a first virtual power supply line, a second virtual power supply line, a latch circuit electrically connected between the first and second power supply lines, at least one logic circuit electrically connected between the first and second virtual power supply lines, a first capacitor electrically connected between the first power supply line and the first virtual power supply line, and a second capacitor electrically connected between the second power supply line and the second virtual power supply line.