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:
Jun. 08, 2010
Filed:
Nov. 08, 2006
Steven John Baumgartner, Zumbro Falls, MN (US);
Anthony Richard Bonaccio, Shelburne, VT (US);
John Francis Bulzacchelli, Yonkers, NY (US);
Daniel Mark Dreps, Georgetown, TX (US);
Steven John Baumgartner, Zumbro Falls, MN (US);
Anthony Richard Bonaccio, Shelburne, VT (US);
John Francis Bulzacchelli, Yonkers, NY (US);
Daniel Mark Dreps, Georgetown, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for implementing phase rotator circuits and phase rotator circuit of the invention includes a polyphase filter network to create a quadrature phase version of the input signal. The polyphase filter network is partitioned into a first part that is physically isolated from the phase rotator circuit and a second part that is embedded in the phase rotator circuit. The second part of the polyphase filter is coupled to the first part of the polyphase filter by a high-pass equalizing buffer stage. The second part of the polyphase filter is coupled to the phase rotator circuit by a bandlimiting buffer stage.