Receiver interface
AssigneeIcera Inc.
InventorsStephen Felix, Colman Hegarty
Life of this patent
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Abstract
The invention provides a receiver comprising a data input and a strobe input. The strobe signal transitions whenever two consecutive bits in the data signal are the same. The receiver comprises combining means for generating a recovered clock signal from a combination of the data and strobe signals. The receiver also comprises a first sampling stage arranged to sample the data signal in dependence on the recovered clock signal, the first sampling stage comprising a plurality of sampling circuits and being arranged to obtain consecutive samples of the data signal using alternating ones of the sampling circuits. A second sampling stage is arranged to sample the data from the first sampling stage in dependence on a local system clock signal.
Claims33
A receiver comprising:
- a data input for receiving a data signal;
- a strobe input for receiving a strobe signal, the strobe signal transitioning whenever two consecutive bits in the data signal are the same;
- combining means for generating a recovered clock signal from a combination of the data signal and the strobe signal;
- a first sampling stage arranged to sample the data signal in dependence on the recovered clock signal, wherein the first sampling stage comprises a plurality of sampling circuits each arranged to receive the data signal, the first sampling stage being arranged to obtain consecutive samples of the data signal using alternating ones of the plurality of sampling circuits;
- and
- a second sampling stage arranged to sample the data from the first sampling stage in dependence on a local system clock signal, wherein the second sampling stage includes a pair of sampling paths for each of the plurality of sampling circuits of the first sampling stage.
A method of receiving and sampling data comprising:
- receiving a data signal;
- receiving a strobe signal which transitions whenever two consecutive bits in the data signal are the same;
- generating a recovered clock signal from a combination of the data signal and the strobe signal;
- sampling the data signal at a first sampling stage in dependence on the recovered clock signal, by supplying the data signal to a plurality of sampling circuits and obtaining consecutive samples of the data signal using alternating ones of the plurality of sampling circuits;
- and
- sampling the data from the first sampling stage at a second sampling stage in dependence on a local system clock signal, wherein the second sampling stage includes a pair of sampling paths for each of the plurality of sampling circuits of the first sampling stage.
A system comprising a transmitter, a receiver, and a wired connection therebetween for transmitting a data signal and a strobe signal from the transmitter to the receiver, the strobe signal transitioning whenever two consecutive data bits in the data signal are the same, and the receiver comprising:
- combining means for generating a recovered clock signal from a combination of the data signal and the strobe signal;
- a first sampling stage arranged to sample the data signal in dependence on the recovered clock signal, wherein the first sampling stage comprises a plurality of sampling circuits each arranged to receive the data signal, the first sampling stage being arranged to obtain consecutive samples of the data signal using alternating ones of the plurality of sampling circuits;
- and
- a second sampling stage arranged to sample the data from the first sampling stage in dependence on a local system clock signal, wherein the second sampling stage includes a pair of sampling paths for each of the plurality of sampling circuits of the first sampling stage.
Dependencies are inferred from the claim text.