Method for detection of line activity for Manchester-encoded signals
Patent 4606052 Issued on August 12, 1986. Estimated Expiration Date: 
December 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 21, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3836956 Method for bit-synchronous transmission of data Patent #: 4142065 InventorsAssigneeApplicationNo. 06/684085 filed on 12/21/1984US Classes:375/333, Biphase (manchester code)327/76, With logic or bistable circuit360/44, Intra-cell transition375/282Biphase (manchester codes)ExaminersPrimary: Bookbinder, Marc E.Assistant: Telesz, Andrew J. Jr. Attorney, Agent or FirmInternational ClassesH03M 5/12 (20060101)H03M 5/00 (20060101) AbstractA signal pre-processing method for detecting valid Manchester-encoded activity on a line carrying Manchester-encoded data signals to an inexpensive Manchester-decoding receiver. Detection is provided by monitoring both a positive-level presence and a negative-level presence to determine whether the received Manchester-encoded signal exceeds a predetermined positive voltage or falls below a predetermined negative voltage. Following detection of such line activity, the received signal is determined to be validly Manchester-encoded if it first crosses a predetermined positive level or a predetermined negative level after having first previously crossed the opposite level within a time interval of 3/4 to 11/4 of the inter-bit period of the received data signals. | |
