US5454008A
Expired / Lapsed
US
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Method and apparatus for interfacing between a twisted pair and an intelligent cell
Assignee: Echelon Corp
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Filing: 1994-09-09
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Granted: 1995-09-26
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Expires: 2014-09-09
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
- 👤 Donald D. Baumann
- 👤 W. Mike Berke
- 👤 Stephen F. Dreyer
- 👤 Rod G. Sinks
- 👤 Kurt A. Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:10
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: 5
Claim 1
Independent Claim
94 words
In a network having a plurality of nodes, each having a transceiver and a cell, an improved method of operation comprising the steps of; providing a power down signal from the cell to the transceiver upon the occurrence of a predetermined activity such that the transceiver cannot receive data from the network; reducing power consumed in the node in response to the power down signal; reactivating power to the transceiver after a predetermined duration which duration is determined by circuitry in the transceiver; and, transmitting a reactivation signal to the cell from the transceiver.
Claim 2
Dependent Claim
94 words
In a network having a plurality of nodes, each having a transceiver and a cell, an improved method of operation comprising the steps of; providing a power down signal from the cell to the transceiver upon the occurrence of a predetermined activity such that the transceiver cannot receive data from the network; reducing power consumed in the node in response to the power down signal; reactivating power to the transceiver after a predetermined duration which duration is determined by circuitry in the transceiver; and, transmitting a reactivation signal to the cell from the transceiver.
Claim 3
Dependent Claim
20 words
The method defined by claim 1 wherein the predetermined activity is the completion of a function performed by the cell.
Claim 4
Dependent Claim
12 words
The method defined by claim 2 wherein the predetermined duration is selectable.
Claim 5
Dependent Claim
25 words
The method defined by claim 3 wherein the selectability of the duration comprises the step of connecting a capacitor at a terminal of the transceiver.
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) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |