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US5771237A
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US
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Multiple rate waveshaping technique for fast ethernet media driver
Assignee: Lite On Communications Corp
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Filing: 1996-01-23
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Granted: 1998-06-23
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Expires: 2016-01-23
Abstract
Abstract A multiple rate waveshaping method and apparatus for converting transmission data into communications code synthesized waveforms having different protocol frequencies in the physical layer of the fast Ethernet utilizes two state machines which convert the transmission data into appropriate waveforms using predetermined wave shaping signals, the outputs of the state machines being multiplexed and transmitted over the Ethernet media using a common set of differential current sourced drivers.
Inventors
- 👤 Ron Kao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:17
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03828; H04L25/03834; H04L12/00; H04L12/28; H04L12/40; H04L12/407; H04L12/413
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
137 words
A method of multiple rate waveshaping for fast Ethernet media drivers, comprising the steps of: converting first transmission data into signals having waveforms suitable for transmission at a first frequency over an Ethernet twisted pair cable by selecting from among a plurality of predetermined waveshape signals corresponding to the transmission data having the first frequency; converting second transmission data signals having waveforms suitable for transmission at a second frequency over said Ethernet twisted pair cable by selecting from among a second plurality of predetermined waveshape signals corresponding to the transmission data having the second frequency; multiplexing waveforms resulting from said selection and supplying the multiplexed signals to a set of differential current source drivers, said differential current source drivers thereby commonly supplying signals corresponding to said first and second transmission data to said Ethernet twisted pair cable.
Claim 2
Independent Claim
137 words
A method of multiple rate waveshaping for fast Ethernet media drivers, comprising the steps of: converting first transmission data into signals having waveforms suitable for transmission at a first frequency over an Ethernet twisted pair cable by selecting from among a plurality of predetermined waveshape signals corresponding to the transmission data having the first frequency; converting second transmission data signals having waveforms suitable for transmission at a second frequency over said Ethernet twisted pair cable by selecting from among a second plurality of predetermined waveshape signals corresponding to the transmission data having the second frequency; multiplexing waveforms resulting from said selection and supplying the multiplexed signals to a set of differential current source drivers, said differential current source drivers thereby commonly supplying signals corresponding to said first and second transmission data to said Ethernet twisted pair cable.
Claim 3
Dependent Claim
41 words
A method as claimed in claim 1, wherein the steps of converting said first and second transmission data comprises the steps of downloading said waveforms during a predetermined period adapted to a frequency of the communications protocol of the transmission data.
Claim 4
Dependent Claim
45 words
A method as claimed in claim 2, wherein the step of downloading said waveshape signals during a predetermined period comprises the step of generating a group of reference pulses adapted to the frequency of the communications protocol by means of a multiple phase pulse controller.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 1, wherein the steps of converting said first and second transmission data comprises the steps of converting the transmission data based on pre-stored state variations.
Claim 6
Dependent Claim
14 words
A method as claimed in claim 1, wherein said first frequency is 10 Mbps.
Claim 7
Dependent Claim
14 words
A method as claimed in claim 1, wherein said second frequency is 125 Mbps.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 6, wherein said first frequency is 10 Mbps.
Claim 9
Dependent Claim
149 words
Apparatus providing multiple rate waveshaping for fast Ethernet media drivers, comprising: means including a first state machine for converting first transmission data into signals having waveforms suitable for transmission at a first frequency over an Ethernet twisted pair cable by selecting from among a plurality of predetermined waveshape signals corresponding to the transmission data having the first frequency; means including a second state machine for converting second transmission data signals having waveforms suitable for transmission at a second frequency over said Ethernet twisted pair cable by selecting from among a second plurality of predetermined waveshape signals corresponding to the transmission data having the second frequency; means for multiplexing waveforms resulting from said selection and supplying the multiplexed signals to a set of differential current source drivers, said differential current source drivers thereby commonly supplying signals corresponding to said first and second transmission data to said Ethernet twisted pair cable.
Claim 10
Dependent Claim
149 words
Apparatus providing multiple rate waveshaping for fast Ethernet media drivers, comprising: means including a first state machine for converting first transmission data into signals having waveforms suitable for transmission at a first frequency over an Ethernet twisted pair cable by selecting from among a plurality of predetermined waveshape signals corresponding to the transmission data having the first frequency; means including a second state machine for converting second transmission data signals having waveforms suitable for transmission at a second frequency over said Ethernet twisted pair cable by selecting from among a second plurality of predetermined waveshape signals corresponding to the transmission data having the second frequency; means for multiplexing waveforms resulting from said selection and supplying the multiplexed signals to a set of differential current source drivers, said differential current source drivers thereby commonly supplying signals corresponding to said first and second transmission data to said Ethernet twisted pair cable.
Claim 11
Dependent Claim
37 words
Apparatus as claimed in claim 8, wherein the first and second state machines comprises means for downloading said wave shape signals during a predetermined period adapted to a frequency of the communications protocol of the transmission data.
Claim 12
Dependent Claim
43 words
Apparatus as claimed in claim 9, wherein the means for downloading said waveshape signals during a predetermined period comprise means for generating a group of reference pulses adapted to the frequency of the communications protocol by means of a multiple phase pulse controller.
Claim 13
Dependent Claim
25 words
Apparatus as claimed in claim 8, wherein the first and second state machines comprise means for converting the transmission data based on pre-stored state variations.
Claim 14
Dependent Claim
13 words
Apparatus as claimed in claim 8, wherein said first frequency is 10 Mbps.
Claim 15
Dependent Claim
13 words
Apparatus as claimed in claim 8, wherein said second frequency is 125 Mbps.
Claim 16
Dependent Claim
13 words
Apparatus as claimed in claim 13, wherein said first frequency is 10 Mbps.
Claim 17
Dependent Claim
26 words
Apparatus as claimed in claim 8, wherein said first and second state machines are respectively, a 10 BASE-T state machine and a 100 BASE-T state machine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |