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. 17, 2013
Filed:
Jan. 15, 2010
Sergey Y. Shumarayev, San Leandro, CA (US);
Rakesh H. Patel, Cupertino, CA (US);
Wilson Wong, San Francisco, CA (US);
Tim T. Hoang, San Jose, CA (US);
Sergey Y. Shumarayev, San Leandro, CA (US);
Rakesh H. Patel, Cupertino, CA (US);
Wilson Wong, San Francisco, CA (US);
Tim T. Hoang, San Jose, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
The disclosed invention is a technology for producing a recovered clock signal using a multi-mode clock data recovery (CDR) circuit that accommodates a flexible range operating frequencies F and consecutive identical digit requirements CID. In a first mode of operation, a controlled oscillator produces the recovered clock signal, and in a second mode of operation, a phase interpolator produces the recovered clock signal. The multi-mode CDR circuit operates in the first mode if (CID/F) is less than a threshold time value and in the second mode if (CID/F) is greater than the threshold time value.