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:
Feb. 02, 1982
Filed:
Oct. 12, 1978
Calvin H Decoursey, Reno, NV (US);
Todd V Townsend, Reno, NV (US);
Other;
Abstract
Simple and reliable decoding of T-1 type pulse code information is achieved by combining a fast-acting recirculating frame recovery circuit with a simplified signal output register. The frame recovery circuit uses a recirculating 386-bit control word in which all positions which cannot be the main-frame bit position are continuously recorded by the continuous comparison of pairs of incoming data bits spaced 386 bits apart. Following a sufficient number of iterations of the control word to statistically identify all 385 non-main-frame bit positions with a high degree of probability, the remaining unidentified position is read out as the main-frame bit position, and is used to reset the frame clock generator. The signalling pulses recovered from the correctly framed data train are distributed to the proper channel relays by a simplified output circuit which loads the signalling bits into a buffer register at a slow rate dictated by the data train parameters, then unloads the buffer register into the output latches at a rate sufficiently fast to make it impossible for the channel relays to spuriously respond to momentary invalid signals occurring during the unloading process.