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:
Jan. 09, 2007
Filed:
May. 13, 2005
Shivakumar Sompur, Sunnyvale, CA (US);
Xiaojun Zhu, Milpitas, CA (US);
Shivakumar Sompur, Sunnyvale, CA (US);
Xiaojun Zhu, Milpitas, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A delay lock loop (DLL) system includes a master DLL and at least one slave DLL. The master DLL comprises a master delay line, a phase detector, and a loop controller. The master delay line of the master DLL includes four quarter cycle delay lines (QCDL). The slave DLL comprises a delay line and a fractional bit delay element. The delay line of the slave DLL is controlled by the slave delay line control signal generated by the loop controller of the master DLL. The final output of the slave DLL is formed such that the output of the delay line of the slave DLL is corrected by the fractional bit delay generated by the factional bit delay element such that the final output of the slave DLL has a finer delay line resolution than the one of the output of the delay line of the slave DLL.