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. 16, 2010
Filed:
Dec. 30, 2008
Ruili Zhang, Folsom, CA (US);
Ruili Zhang, Folsom, CA (US);
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A level shifter circuit includes first and second supply inputs for receiving a first supply voltage and a second supply voltage, respectively. The level shifter circuit further comprises a shifting circuit configured to receive an input voltage and output a selected one of the first supply voltage and the second supply voltage according to the value of the input voltage. The shifting circuit includes a circuit branch connected between the first supply input and the second supply input. The circuit branch includes a plurality of series-connected electronic devices and a voltage dropper device connected in series with the plurality of electronic devices for introducing a voltage drop. The level shifter circuit includes a bias generator configured to generate a bias voltage for the voltage dropper device according to values of the first supply voltage and the second supply voltage, said voltage drop depending on the bias voltage.