Pulse or digital communications – Cable systems and components – Transformer coupling
Patent
1996-10-25
1999-04-20
Le, Amanda T.
Pulse or digital communications
Cable systems and components
Transformer coupling
375377, 370463, 370466, 370538, 333124, 333 32, 359115, H04B 300
Patent
active
058964177
ABSTRACT:
An electronic apparatus capable of transmitting data at two or more different data rates contains transmitter circuitry, a cable connection mechanism, and an isolation transformer having a primary winding and a secondary winding. The transmitter circuitry low-pass filters digital data which the transmitter circuitry transmits to the primary winding at a first data rate. The transmitter circuitry also transmits digital data to the primary winding at a second data rate different from, typically greater than, the first data rate. The cable connection mechanism provides outgoing data from the secondary winding to the communication cable. Importantly, the transmitter circuitry is operable to generate current-sourced data signals at both data rates and then to convert the current-sourced signals into impedance-produced voltage signals that constitute the outgoing data. Current-source amplifier circuitry normally generates the current-sourced signals. Impedance circuitry then converts the current-sourced signals into the outgoing data.
REFERENCES:
patent: 3936602 (1976-02-01), Korver
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: 5253249 (1993-10-01), Fitzgerald et al.
patent: 5260664 (1993-11-01), Graham
patent: 5336946 (1994-08-01), Segaram et al.
patent: 5357145 (1994-10-01), Segaram
patent: 5410188 (1995-04-01), Segaram
patent: 5444410 (1995-08-01), Polhemus
patent: 5541957 (1996-07-01), Lau
patent: 5715287 (1998-02-01), Wadhawan et al.
Bryan, "Pumping up Ethernet," Byte, vol. 18, No. 9, Aug. 1993, pp. 121-126.
Leonard, "FDDI Rides Twisted Pair To The Desktop," Electronic Design, Sep. 16, 1993, pp. 85, 86, and 88.
Rosenblatt, "Data Communications," 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., May 12-15, 1991, pp. 7.3.1-7.3.4.
"Application Notes for the FDDI-TP Interface Modules," application note, bel, Jul. 1993, 1 p.
"10Base-T Dual Isolation and Filter Module," data sheet, Pulse Engineering, Inc., May 1992, 2 pp.
"DP83223 TWISTER Twisted Pair FDDI Transceiver Device," preliminary data sheet, National Semiconductor, Jul. 1993, pp. 1-10.
"DP83840 10/100 Mb/s Ethernet Physical Layer," preliminary data sheet, National Semiconductor, Sep. 1995, pp. 1-56.
"Electromagnetic compatability for industrial-process measurement and control equipment, Part 3: Radiated electromagnetic field requirements" International Standard, CEI/IEC 801-3, Third Impression, 1992, pp. 1-41 and 2 further pp.
"Fast Cats.TM. Cougar Series 10/100 Base-TX and ATM Transformer Modules," PT4171/PT4171S/ST6118, PT4172, and ST6114 data sheet, Valor Electronics, 1995, 4 pp.
"FDDI-TP Interface Module," data sheet, bel, Jul. 1993, 2 pp.
"IEEE Link Task Force Autodetect, Specification for NWay Autodetect," Version 1.0, Apr. 10, 1994, pp. 1-59 and 7 further pp.
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.
"Low Profile Surface Mount 10Base-T Interface Module," data sheet, Pulse Engineering, Inc., Mar. 1993, 4 pp.
"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, Jul. 24, 1994, pp. i-xviii and 21-1 -30-85 and 6 further pp.
"Media Access Control (MAC) Parameters, Physical Layer, Medium Attachment Units, and Repeater for 100 Mb/s Operation, Type 100Base-T (Clauses 21-30)," 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 802.3u-1995, Oct. 26, 1995, pp. i-xiii and 1-413 and 9 further pp.
"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, 1994, pp. 1-41.
"Radio Frequency Devices," 47 CFR Ch. 1, Part 15, Oct. 1993, pp. 536-583.
"System Considerations for Multisegement 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, Mar. 8, 1991, 55 pp.
Le Amanda T.
Meetin Ronald J.
National Semiconductor Corporation
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