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:
Jul. 12, 1983
Filed:
Mar. 09, 1979
Abdallah M Itani, Ballston Spa, NY (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A data transmission system and method is provided for transferring digital information which has been converted to a multiframe format of serial bits over a single optical cable. The mutliframe format used by the system includes sequential data frames each containing a sequence of bits at a bit frequency, of which a certain number are data bits containing the digital information. The data frames are transferred by way of the optical cable to a receiver. In the receiver a clock signal is generated by a variable oscillator which operates at a frequency substantially equal to the bit frequency. Circuitry responsive to the bits maintains a predetermined phase relationship between the clock signal from the oscillator and the bits. Decoder circuitry receives the transmitted bits and decodes the bits to retrieve the digital information using the clock signal from the oscillator. The method of retrieving the digital information from the above-described multiframe format, after having been transferred over the single optical cable, includes the following steps: A clock signal is generated having a frequency substantially equal to the bit frequency. A predetermined phase relationship is maintained between the clock signal and the bits. The clock signal is then used to select the data bits from the sequence of bits in the data frames and to retrieve the digital information from the data bits.