US5548614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for interfacing between a twisted pair and an intelligent cell
Assignee: Echelon Corp
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Filing: 1995-04-19
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Granted: 1996-08-20
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Expires: 2015-04-19
Abstract
Abstract A transceiver module for coupling between cells in a distributed intelligence network and a twisted pair line. The module receives power from the line and provides power to its respective cell. At the end of transmitting a packet, the transceiver transmits a code violation, then an anti-code violation to dissipate energy in the line. This is followed by clamping the line for the dead time between packets. N transceivers may be connected (without a cell) to form a repeater. The transceiver module may be used in a network having free topology; that is, an ideal transmission line, with terminators is not needed.
Inventors
- 👤 Kurt A. Stoll
- 👤 Karl F. Osterlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:27
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/0264; H04L25/0266; H04L25/0272; H04L25/028; H04L25/0292; H04L5/00; H04L5/14; H04L5/1461
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A repeater comprising: n transceivers for connecting to n lines, each transceiver having a receive data terminal on which data from one of the n lines is coupled, a transmit data terminal for receiving data that is to be transmitted onto the one of the n lines, a transmit enable terminal for receiving a signal that enables transmission onto the one of the n lines, and a carrier detection terminal that provides a signal when a transmission is detected on the one of the n lines; a first logic means interconnecting the receive data terminals of the n transceivers to the transmit data terminals of the n transceivers; and, a second logic means interconnecting the carrier detection terminals of the n transceivers to the transmit enable terminals of the n transceivers.
Claim 2
Dependent Claim
131 words
A repeater comprising: n transceivers for connecting to n lines, each transceiver having a receive data terminal on which data from one of the n lines is coupled, a transmit data terminal for receiving data that is to be transmitted onto the one of the n lines, a transmit enable terminal for receiving a signal that enables transmission onto the one of the n lines, and a carrier detection terminal that provides a signal when a transmission is detected on the one of the n lines; a first logic means interconnecting the receive data terminals of the n transceivers to the transmit data terminals of the n transceivers; and, a second logic means interconnecting the carrier detection terminals of the n transceivers to the transmit enable terminals of the n transceivers.
Claim 3
Dependent Claim
16 words
The repeater defined by claim 1 wherein the first and second logic means are OR gates.
Claim 4
Dependent Claim
25 words
The repeater defined in claim 1 wherein each of the transceivers disables its data transmission when the signal at its carrier detection terminal is active.
Claim 5
Dependent Claim
253 words
A repeater comprising: a first transceiver for coupling to a first line, said transceiver having a first receive data terminal on which data from the first line is coupled, a first transmit data terminal for receiving data that is to be transmitted onto the first line, a first transmit enable terminal for receiving a signal that enables transmission onto the first line and a first carrier detection terminal that provides a signal when a transmission is detected on the first line; a second transceiver for coupling to a second line, said second transceiver having a second receive data terminal on which data from the second line is coupled, a second transmit data terminal for receiving data that is to be transmitted onto the second line, a second transmit enable terminal for receiving a signal that enables transmission onto the second line and a second carrier detection terminal that provides a signal when a transmission is detected on the second line; a first connection between said first receive data terminal of the first transceiver and said second transmit data terminal of said second transceiver; a second connection between said first transmit data terminal of said first transceiver and said second receive data terminal of said second transceiver; a third connection between said first transmit enable terminal of said first transceiver and said second carrier detection terminal of said second transceiver, and; a fourth connection between said first carrier detection terminal of said first transceiver and said second transmit enable terminal of said second transceiver.
Claim 6
Dependent Claim
253 words
A repeater comprising: a first transceiver for coupling to a first line, said transceiver having a first receive data terminal on which data from the first line is coupled, a first transmit data terminal for receiving data that is to be transmitted onto the first line, a first transmit enable terminal for receiving a signal that enables transmission onto the first line and a first carrier detection terminal that provides a signal when a transmission is detected on the first line; a second transceiver for coupling to a second line, said second transceiver having a second receive data terminal on which data from the second line is coupled, a second transmit data terminal for receiving data that is to be transmitted onto the second line, a second transmit enable terminal for receiving a signal that enables transmission onto the second line and a second carrier detection terminal that provides a signal when a transmission is detected on the second line; a first connection between said first receive data terminal of the first transceiver and said second transmit data terminal of said second transceiver; a second connection between said first transmit data terminal of said first transceiver and said second receive data terminal of said second transceiver; a third connection between said first transmit enable terminal of said first transceiver and said second carrier detection terminal of said second transceiver, and; a fourth connection between said first carrier detection terminal of said first transceiver and said second transmit enable terminal of said second transceiver.
Claim 7
Dependent Claim
25 words
The repeater defined by claim 4 including an oscillator for providing a clock signal, said oscillator being coupled to said first and said second transceivers.
Claim 8
Dependent Claim
15 words
The repeater defined by claim 4 including isolation means for providing isolation within said connections.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-20 | 2000-02-19 | 2000-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-20 | 2004-02-19 | 2004-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-20 | 2008-02-19 | 2008-08-20 | $7700.00 | Window Closed / Lapsed |