Single master clock control of Ethernet data transfer over both a cable TV return path and an Ethernet forward path
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United States of America Patent
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Oct 4, 2011
Grant Date -
Dec 8, 2005
app pub date -
Aug 2, 2004
filing date -
May 12, 2004
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Abstract
An optical signal return path system analog RF signals are sampled using a master clock frequency, and combined with digital data such as Ethernet data at a cable node. The cable node sends the combined signals on a return path over a fiber optic medium to the cable hub. The cable hub extracts an approximate in-frequency replicate of a master clock signal, and can use the replicate master clock signal to desample the digitized RF signals back to analog. The cable hub can further use the replicate of the master clock signal to serialize Ethernet data, and send the Ethernet data back to the cable node via an optical cable in the forward direction. Accordingly, a single master clock signal can be used on a CATV network for encoding/decoding, and transmitting a variety of data signals, which enhances the integrity and reliability of the data signals.
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- 15 United States
- 10 France
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- 5 Korea
- 2 Other
Patent Owner(s)
- FINISAR CORPORATION
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Gordy, Stephen Charles | Sunnyvale, US | 3 | 21 |
Lawson, Arthur Michael | Morgan Hill, US | 10 | 522 |
Oyadomari, Randy Ichiro | San Jose, US | 5 | 22 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
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