Arrangement for transmitting digital data signals
AssigneeSiemens Aktiengesellschaft
InventorDittmar Janetzky
Life of this patent
Estimating the term…
Abstract
In an arrangement for transmitting digital data signals between subscriber stations which are connected to a common data and control line, each subscriber station contains a clock generator with all clock generators synchronized via a common clock line. The station sending data signals switches the data during a given clock phase to the data line, and the stations receiving data likewise accept the data during a given clock phase. All clock generators are held in the given clock phase until data are accepted so that all clock generators are synchronized to the slowest clock.
Claims10
In an arrangement for transmitting data signals between subscriber stations which are connected to common data and control lines, in which at least the signals of the control lines are formed by logically combining the output signals of the subscriber stations and in which the data sending station switches the data signals, during a given phase of a control signal on a control line, to the data line and the data receiving station transmit an indication of the receipt of the data and a control signals indicating readiness for receiving new data to the sending station, whereupon the sending station is adapted to remove the data signals then present on the data line and provide new data, the improvement comprising:
- a clock generator in each subscriber station;
- a common clock line;
- means synchronizing all of said clock generators by means of said common clock line such as to hold all clock generators in a given clock phase until all clock generators are enabled for the next clock phase;
- and
- means to cause the data sending stations to switch data signals to the data line during a given clock phase;
- and
- means in the stations receiving the data signals adapted to enable the clock generators contained therein for the next phase only when the data signals have been transferred.
Dependencies are inferred from the claim text.