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:
Aug. 05, 2008
Filed:
Jun. 27, 2006
Russell Hershbarger, Nevada City, CA (US);
Kiyoshi Fukahori, Irvine, CA (US);
Russell Hershbarger, Nevada City, CA (US);
Kiyoshi Fukahori, Irvine, CA (US);
Teridian Semiconductor Corporation, Irvine, CA (US);
Abstract
A method and apparatus for synchronizing the secondary side to the primary side of a transformer circuit are presented. A preamble which consists primarily of data pulses and inverted power pulses is used initially to obtain the parameters for and to set up a phase locked loop. For example, an edge-triggered one-shot circuit can be used to generate a reference clock from the preamble until lock is detected. Once the phase lock loop locks onto the clock, normal communication between the primary and secondary commences. The phase lock loop, which is in the secondary, is kept in phase during normal communication using valid Manchester edges from the transmit signal.