CA2277631A1 - Transmission channel for the electrically isolated transmission of digital signals - Google Patents

Transmission channel for the electrically isolated transmission of digital signals Download PDF

Info

Publication number
CA2277631A1
CA2277631A1 CA002277631A CA2277631A CA2277631A1 CA 2277631 A1 CA2277631 A1 CA 2277631A1 CA 002277631 A CA002277631 A CA 002277631A CA 2277631 A CA2277631 A CA 2277631A CA 2277631 A1 CA2277631 A1 CA 2277631A1
Authority
CA
Canada
Prior art keywords
signal
channel
transmission
digital
electrically isolated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002277631A
Other languages
French (fr)
Other versions
CA2277631C (en
Inventor
Stephan Konrad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser Wetzer GmbH and Co KG
Original Assignee
Endress and Hauser Wetzer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Endress and Hauser Wetzer GmbH and Co KG filed Critical Endress and Hauser Wetzer GmbH and Co KG
Publication of CA2277631A1 publication Critical patent/CA2277631A1/en
Application granted granted Critical
Publication of CA2277631C publication Critical patent/CA2277631C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electronic Switches (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

For the electrically isolated transmission of digital signals, an isolating path (IP) of the channel formed by means of a transformer is used. The channel further comprises a conversion stage (SC1) for converting the digital signal (txd1) to a transmissible coupling signal (txt1) and a conversion stage (SC2) for converting a coupling signal (rxt2) to the digital signal (rxd2). This conversion is accomplished by means of a monostable multivibrator. The coupling signal (txt1) is a square-wave voltage (AU2) which is generated by means of a delay circuit (4) in the conversion stage (SC1) and is converted on the isolating path (IP) to a square-wave voltage (AU3) serving as the coupling signal (rxt2). Furthermore, the direction of transmission is switchable in operation by means of activatable digital-signal ports (TXD1', RXD2', TXD2', RXD1') of the channel. The activation is effected by means of selection signals (rxa1', rxa2'). When no signal is being transmitted, the channel is in a defined initial state. The channel has low power consumption and the transmitted signal is highly immune to electromagnetic interference.
CA002277631A 1998-07-17 1999-07-16 Transmission channel for the electrically isolated transmission of digital signals Expired - Fee Related CA2277631C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98113334 1998-07-17
EP98113334.1 1998-07-17
US10978698P 1998-11-25 1998-11-25
US60/109,786 1998-11-25

Publications (2)

Publication Number Publication Date
CA2277631A1 true CA2277631A1 (en) 2000-01-17
CA2277631C CA2277631C (en) 2002-07-09

Family

ID=26149440

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002277631A Expired - Fee Related CA2277631C (en) 1998-07-17 1999-07-16 Transmission channel for the electrically isolated transmission of digital signals

Country Status (5)

Country Link
EP (1) EP0977406B1 (en)
AT (1) ATE443960T1 (en)
CA (1) CA2277631C (en)
DE (1) DE59915083D1 (en)
ES (1) ES2331214T3 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10243197B4 (en) 2002-09-18 2011-05-05 Infineon Technologies Ag Digital signal transmission method
WO2004100473A2 (en) * 2003-04-30 2004-11-18 Analog Devices, Inc. Signal isolators using micro-transformers
DE102007060555A1 (en) 2007-12-13 2009-06-18 Endress + Hauser Wetzer Gmbh + Co Kg Device for transmitting electrical energy and information
EP2242223B1 (en) * 2009-04-14 2011-08-31 Actaris SAS Wireless bi-directional transmission of serial data signals between an electronic device and an energy meter
US9293997B2 (en) 2013-03-14 2016-03-22 Analog Devices Global Isolated error amplifier for isolated power supplies
US10536309B2 (en) 2014-09-15 2020-01-14 Analog Devices, Inc. Demodulation of on-off-key modulated signals in signal isolator systems
US9660848B2 (en) 2014-09-15 2017-05-23 Analog Devices Global Methods and structures to generate on/off keyed carrier signals for signal isolators
US10270630B2 (en) 2014-09-15 2019-04-23 Analog Devices, Inc. Demodulation of on-off-key modulated signals in signal isolator systems
US9998301B2 (en) 2014-11-03 2018-06-12 Analog Devices, Inc. Signal isolator system with protection for common mode transients

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2555045A1 (en) * 1975-12-06 1977-06-08 Hartmann & Braun Ag Bidirectional DC isolator for square wave signals - has single transformer which is coupled by two windings into two transceiver circuits
DE3512280A1 (en) * 1985-04-03 1986-10-09 Nixdorf Computer Ag, 4790 Paderborn CIRCUIT ARRANGEMENT FOR EARTH-FREE TRANSMISSION OF DIGITAL SIGNALS THROUGH DISCONNECTORS
DE3614832A1 (en) 1986-05-02 1987-11-05 Philips Patentverwaltung Isolating signal transmission circuit
AT391959B (en) 1988-06-03 1990-12-27 Dau Ges M B H & Co Kg COUPLERS FOR THE POTENTIAL-SEPARATE TRANSMISSION OF A TWO-VALUE SIGNAL BY MEANS OF A PULSE TRANSFORMER
US5418933A (en) * 1990-02-20 1995-05-23 Sharp Kabushiki Kaisha Bidirectional tri-state data bus buffer control circuit for delaying direction switching at I/O pins of semiconductor integrated circuit
US5384808A (en) * 1992-12-31 1995-01-24 Apple Computer, Inc. Method and apparatus for transmitting NRZ data signals across an isolation barrier disposed in an interface between adjacent devices on a bus
DE29514238U1 (en) * 1995-09-05 1995-10-19 Siemens AG, 80333 München Mining data transmission device between firedamp-protected devices
US5627480A (en) * 1996-02-08 1997-05-06 Xilinx, Inc. Tristatable bidirectional buffer for tristate bus lines
US5952849A (en) * 1997-02-21 1999-09-14 Analog Devices, Inc. Logic isolator with high transient immunity

Also Published As

Publication number Publication date
DE59915083D1 (en) 2009-11-05
EP0977406A1 (en) 2000-02-02
CA2277631C (en) 2002-07-09
EP0977406B1 (en) 2009-09-23
ATE443960T1 (en) 2009-10-15
ES2331214T3 (en) 2009-12-23

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20170717