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. 14, 2004
Filed:
Sep. 24, 2002
Toshio Maejima, Iwata, JP;
Akihiko Toda, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A signal level shift circuit is provided for different circuit systems operating based on different supply voltages (VDDL, VDDH), wherein a supply voltage detection circuit detects a reduction of a first supply voltage (VDDL) regarding an input signal (IN). A level shift circuit comprises a load circuit portion consisting of PMOS transistors and a drive circuit portion consisting of NMOS transistors, all of which are connected together to form current paths. A switch circuit arranged for the current paths opens when a reduction is detected in the first supply voltage so that both the NMOS transistors are turned on. Thus, it is possible to effectively avoid occurrence of through currents flowing in the level shift circuit. The level shift circuit is followed by a flip-flop, which provides an output signal (OUT) in conformity with a second supply voltage (VDDH).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile