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US 9,071,357 B1Granted
Data communications system including an optical fiber data link disposed between serial bidirectional electrical data busses
AssigneeEmcore Corporation
InventorsFeng Shi, Sang Lee
Life of this patent
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Abstract
An optical fiber data communications network in which an electro-optical transceiver couples a plurality of serial electrical data buses over a single bidirectional optical fiber link, and includes a controller that functions by oversampling the digital electrical signal on each of such buses, multiplexes them, and converts the signal into a high speed optical signal for transmission over an optical fiber.
Claims20
A communications network comprising:
- a first bidirectional serial electrical bus having a first data rate and using a predetermined electrical data protocol for coupling with a plurality of network nodes;
- a first interface controller coupled to the first bidirectional serial electrical bus for sampling signals received from the first bidirectional serial electrical bus at a sampling rate at least fifty times larger than the first data rate and encoding resultant sampled data into a second digital signal for transmission at a second data rate substantially greater than the first data rate;
- an electro-optical transmitter coupled to the first interface controller for converting the second digital signal into an optical signal at a first optical frequency for transmission over an optical fiber;
- an optical fiber coupled to the electro-optical transmitter for transmitting the optical signal to a remote receiver;
- an electro-optical receiver coupled to the optical fiber for converting the optical signal into an electrical signal;
- and
- a second interface controller coupled to the electro-optical receiver for decoding the electrical signal from the electro-optical receiver and processing the decoded electrical signal to generate a digital signal for transmission on a second bidirectional serial electrical bus using said predetermined electrical data protocol, wherein the second interface controller comprises a pre-distorter arranged to add pre-distortion to compensate for signal distortion.
4 more elements
An integrated circuit device comprising:
- a first interface controller for sampling signals received from a serial bidirectional electrical bus at a sampling rate, wherein the received signals are at a first data rate and the sampling rate is at least fifty times larger than the first data rate, and encoding the sampled data into a second digital signal for transmission at a second data rate substantially greater than the first data rate, and
- a second interface controller coupled for decoding an electrical signal at the second data rate and processing the decoded electrical signal to generate a digital signal for transmission on the bidirectional serial electrical bus using a predetermined electrical data protocol, wherein the second interface controller is arranged to recover the timing of Manchester-encoded digital data by dynamic adjustment of a starting time reference for a decision window, and wherein the second interface controller is arranged to apply a transition window corresponding to half a Manchester code bit period.
A non-volatile storage medium comprising instructions for programming a programmable apparatus to sample signals received from a serial bidirectional electrical bus at a sampling rate, wherein the received signals are at a first data rate and the sampling rate is at least fifty times larger than the first data rate, and to encode the sampled data into a second digital signal for transmission at a second data rate substantially greater than the first data rate;
- and further comprising (i) instructions for decoding an electrical signal received at the second data rate and processing the decoded electrical signal to generate a digital signal for transmission on the bidirectional serial electrical bus using a predetermined electrical data protocol;
- and (ii) instructions for introducing pre-distortion to compensate for distortion generated on transmission of the digital signal on the serial electrical bus, wherein the instructions for introducing pre-distortion include instructions to shift a bias level of the digital signal for transmission.
A communications network comprising:
- a first bidirectional serial electrical bus having a first data rate and using a predetermined electrical data protocol for coupling with a plurality of network nodes;
- a first interface controller coupled to the first bidirectional serial electrical bus for sampling signals received from the first bidirectional serial electrical bus at a sampling rate at least fifty times larger than the first data rate and encoding resultant sampled data into a second digital signal for transmission at a second data rate substantially greater than the first data rate;
- an electro-optical transmitter coupled to the first interface controller for converting the second digital signal into an optical signal at a first optical frequency for transmission over an optical fiber;
- an optical fiber coupled to the electro-optical transmitter for transmitting the optical signal to a remote receiver;
- an electro-optical receiver coupled to the optical fiber for converting the optical signal into an electrical signal;
- and
- a second interface controller coupled to the electro-optical receiver for decoding the electrical signal from the electro-optical receiver and processing the decoded electrical signal to generate a digital signal for transmission on a second bidirectional serial electrical bus using said predetermined electrical data protocol,
- wherein the signals on the first bidirectional serial electrical bus correspond to Manchester-encoded data signals, wherein the second interface controller is arranged to recover the timing of the Manchester-encoded data signals by dynamic adjustment of a starting time reference for a decision window, and wherein the second interface controller is arranged to apply a transition window corresponding to half a Manchester code bit period.
5 more elements
An integrated circuit device comprising:
- a first interface controller for sampling signals received from a serial bidirectional electrical bus at a sampling rate, wherein the received signals are at a first data rate and the sampling rate is at least fifty times larger than the first data rate, and encoding the sampled data into a second digital signal for transmission at a second data rate substantially greater than the first data rate, and
- a second interface controller coupled for decoding an electrical signal at the second data rate and processing the decoded electrical signal to generate a digital signal for transmission on the bidirectional serial electrical bus using a predetermined electrical data protocol, wherein the second interface controller comprises a pre-distorter arranged to introduce pre-distortion to compensate for distortion generated on transmission to the serial bidirectional electrical bus.
Dependencies are inferred from the claim text.