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:
Feb. 26, 2008
Filed:
Jul. 14, 2006
Antonino LA Malfa, Catania, IT;
Marco Messina, Augusta, IT;
Antonino La Malfa, Catania, IT;
Marco Messina, Augusta, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A dual power supply digital device includes a down converter for converting an externally applied supply voltage to a regulated first supply voltage for powering a core part of the logic circuitry of the digital device. A second supply voltage source provides a second supply voltage for powering input buffers of the I/O pads of the digital device. A voltage translator latch stage may be powered at the regulated down converted first supply voltage for replicating a stored inverted replica of a logic value present on a respective I/O pad of the digital device onto an input node of a respective second input logic buffer powered at the regulated core supply voltage. The device may further include a transistor having a turn-on threshold coupling the input node of the second buffer to the regulated down converted core supply voltage, with the transistor having a control gate connected to the second power supply source.