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. 09, 1986
Filed:
Apr. 06, 1984
Hamid Najafi, Palo Alto, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
Disclosed is a digital phase-locked loop circuit for telecommunication circuits receiving bipolar codes. The digital phase-locked loop circuit includes a transition timer means for counting a transition duration between a high mark and a low mark in said bipolar code. A clock recovery signal is generated by dividing a transition duration by a value, such as two, to indicate an apparent zero crossing time, and comparing the apparent zero crossing time with the reference clock in the circuit receiving the bipolar code. The reference clock in the receiving circuit is adjusted in response to the clock recovery signal in order to maintain the reference clock substantially in phase with the incoming bipolar code.