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:
Apr. 15, 2003
Filed:
Jul. 26, 2001
Eric M. J. Evans, Headington, GB;
Lawrence M. DeVito, Tewksbury, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An adjustable offset voltage circuit is disclosed for applying an offset voltage to a differential voltage in a digital data receiver system. The circuit includes a pair of emitter follower units, and a pair of current generating units. The first emitter follower unit provides a first offset voltage, and the second emitter follower unit provides a second offset voltage. The first current generating unit provides a biasing current to the first emitter follower unit, and the second current generating unit provides a biasing current to the second emitter follower unit. The circuit also includes a pair of differential signal input ports, each of which is coupled to one of the first and second emitter follower units, and an offset adjustment unit for permitting offset adjustment of a differential output signal with respect to a differential input signal at the input ports.