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:
Sep. 03, 2002
Filed:
Feb. 07, 2001
Naoki Nojiri, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a level shifter including a latch consisting of two p-channel transistors P and P , when an input signal at a terminal IN changes from H- into L-level, an n-channel transistor N turns ON, thereby dropping a potential level at a node W . However, since a p-channel transistor P is OFF, no short-circuit current flows from a high voltage supply VDD into the ground by way of the transistors P and N . On the other hand, since n- and p-channel transistors N and P are OFF, both terminals of a node W are electrically isolated. But the high voltage supply VDD pulls the node W up to a high voltage level by way of the p-channel transistors P and P and another p-channel transistor P as a resistor. Accordingly, the capacitance to be driven by the n-channel transistors N and N can be reduced, thus shortening the delay.