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:
Oct. 15, 1996
Filed:
Apr. 24, 1995
Mathew A Boytim, Westfield, IN (US);
Francis M Palazzolo, Auburn Hills, MI (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
A phase-locked loop circuit recovering original clock information and original stream of binary data both from Manchester-coded data is disclosed. The phase-locked loop circuit comprises first, second, and third exclusive-OR circuits each with two inputs and an output. The phase-locked loop circuit further comprises a controlled oscillator that generates two local clock signals that are phase shifted from each other, preferably by an amount of 90.degree., with the first being at 0.degree. phase shift. The 0.degree. clock signal is applied to one input of the first exclusive-OR circuit having Manchester-coded data at its other input. The 90.degree. phase shifted clock is applied to one input of the second exclusive-OR circuit having Manchester-coded data at its other input. The output of each of the first and second exclusive-OR circuits, after passing through associated circuitry, is applied to the third exclusive-OR circuit. The third exclusive-OR circuit produces an output signal having a frequency that is directly proportional to that of the original clock information. The output signal of the third exclusive-OR circuit is applied to the input of controlled oscillator which, in turn, locks the 0.degree. output phase shift to the Manchester-coded data allowing the stream of binary bits to be stripped therefrom. The frequency of the 0.degree. output phase signal, by the means of operation of the controlled oscillator, becomes or corresponds to that of the original clock information.