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:
Sep. 16, 2003
Filed:
Dec. 17, 2001
Applicant:
Inventors:
Juan-Antonio Carballo, Austin, TX (US);
David William Boerstler, Round Rock, TX (US);
Jeffrey L. Burns, Austin, TX (US);
Ivan Vo, Austin, TX (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/00 ; H03B 5/24 ;
U.S. Cl.
CPC ...
H03B 5/00 ; H03B 5/24 ;
Abstract
In a first form, a voltage controlled oscillator includes delay cells connected in a ring, and control elements connected to selectively bypass respective sets of the delay cells. The delay cells are operable to receive respective differential inputs and to generate inverted outputs. The control elements are operable to receive respective differential inputs and to generate non-inverted outputs with variable delays. The control element delays are variable responsive to respective differential control voltages.