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. 22, 2011
Filed:
Jul. 07, 2008
David P. Foley, Chelmsford, MA (US);
Hongxing LI, Tokyo, JP;
David P. Foley, Chelmsford, MA (US);
Hongxing Li, Tokyo, JP;
Analog Devices, Inc., Norwood, MA (US);
Abstract
In one aspect, a level shifter for shifting a voltage level from a first voltage level to a second voltage level and having a predictable power-up state is provided. The level shifter comprises a first input and a second input forming a differential input to receive signals at the first voltage level, a first output and a second output forming a differential output to provide output signals at the second voltage level, and at least one circuit element coupled between the differential input and the differential output to pull the first output to a lower voltage level than the second output during power-up so that the level shifter powers-up in a desired state.