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. 28, 1999
Filed:
Feb. 25, 1998
Marco Fontana, Milan, IT;
Antonio Barcella, Trescore Balneario, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
In a first operation mode the level shifter transmits as output a logic input signal and in a second operation mode it shifts the high logic level of the input signal from a low to a high voltage. The level shifter comprises a CMOS switch and a pull-up transistor; the CMOS switch comprises an NMOS transistor and a PMOS transistor which are connected in parallel between the input and the output of the shifter and have respective control terminals connected to a first supply line at low voltage and, respectively, to a control line connected to ground in the first operation mode and to the high voltage in the second operation mode; the pull-up transistor is connected between the output of the shifter and a second supply line switchable between the low voltage and the high voltage and has a control terminal connected to the first supply line.