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. 09, 2009
Filed:
Oct. 30, 2003
Woogeun Rhee, Norwood, NJ (US);
Daniel Friedman, Sleepy Hollow, NY (US);
Mehmet Soyuer, Stamford, CT (US);
Woogeun Rhee, Norwood, NJ (US);
Daniel Friedman, Sleepy Hollow, NY (US);
Mehmet Soyuer, Stamford, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Phase interpolation techniques for voltage-controlled delay line (VCDL) implementation are provided. The techniques of the invention may employ a second-order phase interpolation topology to improve tuning range performance of the VCDL over process and temperature variation. In one aspect of the invention, the technique may use a complementary input signal to set an absolute 180-degree phase reference. As a result, the maximum tuning range of 180 degrees can be achieved regardless of internal delay variation.