High speed, low noise digital data communication system
AssigneeBurroughs Corporation
InventorFloyd W. Looschen
Life of this patent
Estimating the term…
Abstract
A serial-type data transmission channel employing a transmitter and a receiver and a plurality of coaxial cables interconnected therebetween with optical coupling being provided at the receiver. One of the coaxial cables is used to transmit data comprised of messages interposed with identifying data indicating whether a next following message is a data message or a control message. Another coaxial cable is used to transmit a clock at one repetition rate when a message is being transmitted and at another repetition rate when identifying data is being transmitted. The receiver employs the received clock to extract the message and identifying data from the received signals, and to also provide indications of message availability and of the type of message received.
Claims9
In a digital data communication system, the combination comprising:
- at least first and second individual transmission lines;
- transmitting means for transmitting digital data over said transmission lines;
- said transmitting means including means for transmitting digital data over said first transmission line in a manner such that a first type of data is transmitted during first time periods and a second type of data is transmitted during second time periods occurring between said first time periods, said first type of data being a message and said second type of data being message identifying data which identifies the type of message transmitted;
- said transmitting means also including means for transmitting a clock over said second transmission line concurrently with transmission of said first and second types of data over said first transmission line and in a manner such that said clock has a first repetition rate during said first time periods and a second repetition rate during said second time periods;
- and
- receiving means for receiving clock and data transmitted thereto from said transmitting means over said transmission lines;
- said receiving means including means responsive to the clock received over said second transmission line for extracting said first and second types of data from the data received over said first transmission line.
Dependencies are inferred from the claim text.