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:
Nov. 13, 2001
Filed:
Mar. 08, 2000
Shree Kant, Fremont, CA (US);
Sun Microsystems, Inc., Palo Alto, CA (US);
Abstract
In a logic circuit having PMOS pull-up devices and NMOS pull-down devices, the PMOS pull-up devices are sized relative to the NMOS pull-down devices according to the number of transistors that simultaneously turn on. In one embodiment, the PMOS transistor width is determined by multiplying the effective NMOS transistor width by a predetermined factor indicative of a current carrying ratio between one of the PMOS pull-up transistors and one of the NMOS pull-down transistors and dividing by the number of PMOS pull-up transistors that simultaneously turn on to charge the output node high. Where the PMOS pull-up devices are parallel-connected, the NMOS transistor width is divided by the number of NMOS transistors.