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:
Apr. 28, 1981
Filed:
Dec. 13, 1978
Charles H Hustig, Hudson, WI (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
Circuitry is disclosed for transmitting clock signal information with a transmitted signal. The transmitted signal is obtained by applying non-return to zero input pulse signals, provided at one-half the frequency of the clock signal, with alternate '1' logic and '0' logic signals, which are coincident with the transitions in the pulse signals, to an exclusive-or logic circuit and combining the output of the exclusive-or logic circuit with the alternate '1' and '0' logic signals at an adder circuit. The adder circuit provides an output that is a succession of signals at one-half the frequency of the clock signal with each of the successive signals having an amplitude different than the amplitude of the preceding signal. The logic signals provided to the adder circuit have an amplitude equal to or greater than the output of the exclusive-or logic circuit. Circuitry is also disclosed for recovering the clock information from the signal provided from the adder and for reconstructing the input pulse signals.