Combining a clock signal and a data signal
First Claim
1. A method of transmitting data in a system including at least one data channel and a separate clock channel, the clock channel being used to decode data transmitted on the at least one data channel, comprising:
- combining a clock signal to be transmitted on the clock channel with a data signal having a plurality of data words to generate a combined clock and data signal, and transmitting the combined clock and data signal on the clock channel;
wherein the data signal has been generated from the data words using an encoding scheme that shifts an energy spectrum of the combined clock and data signal away from an effective loop bandwidth of a clock recovery block.
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Abstract
A method of transmitting data in a system including at least one data channel and a separate clock channel is disclosed. The method involves combining a clock signal to be transmitted on the clock channel with a data signal to generate a combined clock and data signal. In one embodiment, the data signal has been generated from data words using an encoding scheme that shifts an energy spectrum of the data signal away from an energy spectrum of the clock signal. In another embodiment, the clock signal has a plurality of pulses each having a front edge and a back edge, and the data signal is modulated onto the clock signal by moving at least one edge (i.e. front or back or both) of the plurality of pulses, thereby to create a combined clock and data signal.
29 Citations
33 Claims
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1. A method of transmitting data in a system including at least one data channel and a separate clock channel, the clock channel being used to decode data transmitted on the at least one data channel, comprising:
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combining a clock signal to be transmitted on the clock channel with a data signal having a plurality of data words to generate a combined clock and data signal, and transmitting the combined clock and data signal on the clock channel;
wherein the data signal has been generated from the data words using an encoding scheme that shifts an energy spectrum of the combined clock and data signal away from an effective loop bandwidth of a clock recovery block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 33)
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12. A method of transmitting data in a system including at least one data channel and a separate clock channel, the clock channel being used to decode data transmitted on the at least one data channel, comprising:
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providing a clock signal having a plurality of pulses, each pulse of the plurality of pulses having a front edge and a back edge;
modulating a data signal having a plurality of data words onto the clock signal by moving at least one edge of the plurality of pulses, thereby to create a combined clock and data signal; and
transmitting the combined clock and data signal on the clock channel.
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23. A system for transmitting data, comprising
a transmitter including at least one data channel and a separate clock channel, the clock channel being used by a receiver to decode data transmitted on the at least one data channel, the transmitter being operative to: -
combine a clock signal to be transmitted on the clock channel with a data signal having a plurality of data words, to generate a combined clock and data signal, and transmit the combined clock and data signal on the clock channel;
wherein the data signal has been generated from the data words using an encoding scheme that shifts an energy spectrum of the combined clock and data signal away from an effective loop bandwidth of a clock recovery block.
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28. A system for transmitting data, comprising
a transmitter including at least one data channel and a separate clock channel, the clock channel being used by a receiver to decode data transmitted on the at least one data channel, the transmitter being operative to: -
provide a clock signal having a plurality of pulses, each pulse of the plurality of pulses having a front edge and a back edge;
modulate a data signal having a plurality of data words onto the clock signal by moving at least one edge of the plurality of pulses, thereby to create a combined clock and data signal; and
transmit the combined clock and data signal on the clock channel.
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Specification