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:
May. 06, 2003
Filed:
Nov. 10, 1999
Frank Gasparik, Monument, CO (US);
Paul J. Smith, Colorado Springs, CO (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A method and apparatus for a propagation delay and time calibration. The apparatus includes a ring oscillator having a first set of elements. The apparatus also includes delay units. The ring oscillator is used to generate a clock signal used to measure the delay in signals received at the delay blocks. In the depicted examples, the clock signal generated by the ring oscillator is used to run a counter that counts the delay between a transition in a data signal and a reference signal. Each of the delay units includes a second set of elements matching those of the first set of elements in the ring oscillator. The elements in the set of elements are selected such that they track the period of the ring oscillator signal generated by the ring oscillator. The delay units are used to implement the desired delay.