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:
Dec. 21, 1999
Filed:
Sep. 10, 1997
Applicant:
Inventors:
Andrew James Pickering, Rugby, GB;
Ian Charles Wood, Towcester, GB;
Assignee:
Phoenix Vlsi Consultants, Ltd., Towcester, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ;
U.S. Cl.
CPC ...
331 57 ; 331 34 ; 3311 / ; 327280 ;
Abstract
A ring oscillator comprises a ring of delay stages in which the output of each stage is input to the next stage in the ring. Tuning of the oscillation frequency of the oscillator is achieved by additionally taking outputs from delay stages elsewhere in the ring as one or two secondary inputs to each delay stage and mixing this or these in variable proportions with the primary input.