US 4,229,621 AGranted

Transmitting means for use in a high speed, low noise digital data communication system

OwnerFloyd W. Looscheninventor

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Abstract

Transmitting means for use in a serial type data transmission channel employing a plurality of coaxial lines for communicating digital data from the transmitting means to a receiving means. The transmitter means provides for transmission of data messages and message identifying data on a first coaxial line and the transmission of a clock on a second coaxial line. The transmitted clock is transmitted at a first repetition rate when a message is being transmitted and at a second repetition rate when message identifying data is being transmitted. The transmitting means employs shift register means capable of selectively shifting applied data in opposite directions so as to provide for the expeditious serial outputting of message and message identifying data to the first coaxial line during separate time periods.

Claims5

Dependent claims

In a digital data transmission system for communicating digital data over a plurality of individual transmission lines, the combination comprising:

transmitting means for transmitting digital data over at least
first and second ones of 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.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/885,945Filed 13 Mar 1978 · division
Priority: 3 Mar 1978
Granted: 21 Oct 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 7/0008
Arrangements for synchronising receiver with transmitter: synchronisation information channels, e.g. clock distribution lines
H04J 3/125
Arrangements providing for calling or supervisory signals: one of the channel pulses or the synchronisation pulse is also used for transmitting…
H04L
Digital communication
H04J
Multiplex communication