Pulse or digital communications – Cable systems and components – Transformer coupling
Patent
1994-06-15
1996-07-30
Chin, Stephen
Pulse or digital communications
Cable systems and components
Transformer coupling
375257, 375377, H04B 300
Patent
active
055419577
ABSTRACT:
A data-transmitting apparatus contains first and second transmitters, a transmit transformer, and a connecting unit for coupling the transformer to an outgoing twisted-pair cable. The first transmitter filters data to produce outgoing data transmitted to the transformer at a first data rate. The second transmitter transmits outgoing data to the transformer at a different, typically greater, second data rate. A data-receiving apparatus contains first and second receivers, a receive transformer, and a connecting unit for coupling an incoming twisted-pair cable to the receive transformer. The first and second receivers receive incoming data from the secondary winding respectively at the first and second data rates. Incoming data is typically provided along data transfer paths that extend from the receive transformer in a daisy chain manner to the receivers. Data moving at either data rate can be transmitted and received without the need for hot switching in the data paths. Optical cables, including an optical transceiver, can be used with, or in place of, the twisted-pair cables.
REFERENCES:
patent: 3936602 (1976-02-01), Krover
patent: 4764922 (1988-08-01), Dieter et al.
patent: 4896349 (1990-01-01), Kubo et al.
patent: 5249183 (1993-09-01), Wong et al.
patent: 5253245 (1993-10-01), Fitzgerald et al.
patent: 5260664 (1993-11-01), Graham
"System Considerations for Multisegment 10 Mb/s Baseband Networks (Section 13), Twisted-Pair Medium Attachment Unit (MAU) and Baseband Medium, Type 10BASE-T (Section 14)," IEEE Standards for Local and Metropolitan Area Networks: Supplement to Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, IEEE Std. 802.3i-1990.
"Physical Layer for 100Mb/s Operation (100Base-X)," Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method & Physical Layer Specifications, Draft Supp. to ANSI/IEEE Std. 802.3, 1993 Edition, Copyright 1994.
Local Area Network Databook, National Semiconductor, 1992, pp. vii-viii, 1-3-1-23, 1-359, 2-34-2-62, 4-7, and 5-7.
"Electromagnetic compatability for industrial-process measurement and control equipment, Part 3: Radiated electromagnetic field requirements," International Standard, CEI/IEC 801-3 (1984), Third Impression 1992.
"Radio Frequency Devices," 47 CFR Ch. 1, Part 15, 1 Oct. 1993, pp. 536-583.
Leonard, "FDDI Rides Twisted Pair To The Desktop," Electronic Design, 16 Sep. 1993, pp. 85, 86, and 88.
Rosenblatt, "Data Communicatiions," IEEE Spectrum, Jan. 1991, pp. 48-51.
Shih et al, "10Mb/s Twisted Pair CMOS Transceiver With Transmit Waveform Pre-equalization," Procs. IEEE 1991 Cust. Integ. Circs. Conf., 12-15 May 1991, pp. 7.3.1-7.3.4.
"10Base-T Dual Isolation and Filter Module," data sheet, Pulse Engineering, Inc., May 1992, 2 pp.
"Low Profile Surface Mount 10Base-T Interface Module," data sheet, Pulse Engineering, Inc., Mar. 1993, 4 pp.
"Application Notes for the FDDI-TP Interface Modules," application note, bel, Jul. 1993, 1 p.
"FDDI-TP Interface Module," data sheet, bel, Jul. 1993, 2 pp.
"IEEE Link Task Force Autodetect, Specification for NWay Autodetect," Version 1.0, 10 Apr. 1994.
"MAC Parameters, Physical Layer, Medium Attachment Units and Repeater for 100 Mb/s Operation (version 1.0)," Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, Draft Supp. to 1993 version of ANSI/IEEE Doc. 807.3u/d2 Std. 802.3, Copyright 1994.
"DP83223 Twister Twisted Pair FDDI Transceiver Device," preliminary data sheet, National Semiconductor, Jul., 1993, pp. 1-10.
Bryan J., "Pumping up Ethernet," Byte vol. 18 No. 9 (Aug. 1993), pp. 121-126.
U.S. application Ser. No. 07/995,193, filed Dec. 22, 1992, Segaram et al.
U.S. application Ser. No. 07/994,660, filed Dec. 22, 1992, Segaram.
U.S. application Ser. No. 08/133,405, filed Oct. 7, 1993, Segaram.
Chin Stephen
Ghebretinsae T.
Meetin Ronald J.
National Semiconductor Corporation
Winters Paul J.
LandOfFree
Apparatus for transmitting and/or receiving data at different da does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for transmitting and/or receiving data at different da, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for transmitting and/or receiving data at different da will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1666477