EP1771952A1 - Circuit de suppression des signaux parasites dans des signaux d'emission emis par le modem d'un appareil electromenager - Google Patents

Circuit de suppression des signaux parasites dans des signaux d'emission emis par le modem d'un appareil electromenager

Info

Publication number
EP1771952A1
EP1771952A1 EP05767987A EP05767987A EP1771952A1 EP 1771952 A1 EP1771952 A1 EP 1771952A1 EP 05767987 A EP05767987 A EP 05767987A EP 05767987 A EP05767987 A EP 05767987A EP 1771952 A1 EP1771952 A1 EP 1771952A1
Authority
EP
European Patent Office
Prior art keywords
modem
filter
circuit arrangement
signals
low
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.)
Withdrawn
Application number
EP05767987A
Other languages
German (de)
English (en)
Inventor
Udo Hertel
Simon Piermeier
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1771952A1 publication Critical patent/EP1771952A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits

Definitions

  • Circuit arrangement for suppressing interference signals in transmission signals emitted by a modem of a domestic appliance
  • the invention relates to a circuit arrangement for the suppression of Störsig- signals in transmission signals, which are delivered by a transmitter branch and a receive branch ent holding modem of a device equipped with a transmitting device for the delivery and a Empfangs ⁇ for receiving data signals household appliance wherein in the transmission branch of the modem, a low-pass filter for attenuating the output from a transmission block of the modem noise is contained with above the Sen- designalfrequenzen interference signal frequencies.
  • the respective transmitting / receiving device comprises a modem which is connected to the respecive domestic appliance and which is connected to the mains alternating voltage circuit arrangement via a coupler.
  • Both the modem and the coupler include various filters, such as low-pass filters and band-pass filters. Measures for the selective elimination of interference signals, which are caused in the respective transmission device and which are above the transmission signal frequencies, are not further known in this connection.
  • Interference signals can sometimes occur with amplitudes which are not adequately suppressed by simple LC low-pass filters and optionally bandpass filters can.
  • the reason for this lies above all in the relatively flat filter characteristic curve. If one were to use filters with steeper filter edges, it would indeed be possible to effectively suppress noise signals of the type mentioned; However, the circuitry required for the realization of such filters would be disproportionately high.
  • the present invention is therefore based on the object, a circuit arrangement of the type mentioned in such a way that with relatively little circuitry effort occurring in the respective transmission signal noise signal known frequency or frequencies, which can not be adequately mitigated using the existing low-pass filter, can be effectively eliminated.
  • the invention has the advantage that it works with a band-stop filter which is relatively easy to implement, upstream of said low-pass filter and thus with relatively little circuit complexity, in order to achieve the desired Störsignalbe ⁇ liberation.
  • An amplifier as required in the known active low-pass filter previously considered is not needed here.
  • the low-pass filter is simply formed by an LC filter arrangement with at least one inductor and one capacitor.
  • the relevant LC filter arrangement also contains an ohmic resistance for determining a specific filter characteristic curve.
  • the band stop filter is expediently formed at least by the said inductance of the LC filter arrangement and a capacitor connected in parallel with this inductance. This results in a particularly low circuit complexity with regard to the realization of said band rejection filter. If appropriate, the parallel circuit just mentioned also contains an ohmic resistance with the aid of which a specific filter characteristic curve of the band-stop filter can be realized in a simple manner.
  • a domestic appliance HG is schematically indicated, which is equipped with a circuit arrangement for suppressing interfering signals in transmission signals, which is equipped with a modulator MO containing a transmission branch and a receiving branch and a receiving device for the reception of data signals Household appliance HG be delivered, is equipped.
  • the household appliance HG in question may be any household appliance that is capable of mains power, such as a washing machine, a dryer, a stove, a refrigerator, a heating system, etc.
  • a network-capable domestic appliance is understood here to be a domestic appliance which can be connected to a communication network for transmitting a wide variety of data signals by means of a transmitting and / or receiving device.
  • this communication network comprises the mains alternating voltage network, from which the supply voltages required for the operation of the respective household appliance are obtained.
  • any other network such as the Internet.
  • the circuit arrangement illustrated in the drawing contains a modem MO containing a transmission branch and a reception branch, which modem is shown as containing a transmission block SB and a reception block EB in the present case.
  • These building blocks SB and EB may be a combined commercial D4: power line FSK transmit / receive block AN1714 from STMicroelectronics - see publication of this company from June 2003).
  • the modem MO just mentioned has a control device ST connected to it, which belongs to a transmitting device and a receiving device of the circuit arrangement.
  • the transmitting device of the relevant circuit arrangement comprises, in addition to the control device ST, for example one or more sensors S present in the domestic appliance H for determining one or more state parameters of the household appliance HG and a memory M in which data signals in the form of Condition signals and / or work programs of the relevant household appliance HG can be stored ist ⁇ .
  • the receiving device of the circuit in question comprises, in addition to the control device ST, for example, one or more actuators SG 1, a display device D, such as an LCD display device, and the aforementioned memory M.
  • data signals transmitted in the reception branch can be stored in the mentioned memory M and displayed in the display device D.
  • the data signals transmitted in the reception branch can be, for example, test signals in the course of carrying out remote diagnostics or new work programs or parts thereof for updating the work programs of the household appliance HG stored in the mentioned memory M.
  • this low-pass filter TP for attenuating the signal frequencies lying above the transmission signal frequencies is connected.
  • this low-pass filter TP comprises only an inductance L 1 located in the transmission branch of the transmission module SB, preferably in the form of a coil, as well as the series arrangement of a capacitor C 1 and an ohmic resistor R 1 .
  • the series circuit consisting of the capacitor C1 and the ohmic resistor R1 is a winding W1 of a transformer T provided for galvanic Tren ⁇ tion parallel to a further winding w2 and a capacitor C3 connected in series to terminals X1, X2 of the scarf shown - Wiring arrangement is connected.
  • the two windings w1 and w2 of the transformer T can have a turn ratio of 1: 1. With the terminals X1, X2 is or the above-mentioned communication network is connected.
  • the receiving branch of the receiving module EB is connected via a capacitor C4 to the connection point between the capacitor C1 and the ohmic resistor R1.
  • This capacitor C4 is connected to the signal input terminal E1 of the receiving module EB remote from the connection point just mentioned.
  • the circuit arrangement shown in the drawing also has a bandstop filter BS, which is connected upstream of the low-pass filter TP on the side of the relevant transmission module SB.
  • this band-cut filter BS consists of the mentioned inductance L as well as of one of these capacitors C2 connected in parallel and optionally of an ohmic resistance R2, which in the present case is likewise connected in parallel with the inductance L.
  • the inductance L is used here both for the low-pass filter TP and for the band-cut filter BS, which represents a particularly low circuit complexity with regard to the filter realization.
  • the low-pass filter TP is dimensioned such that the signal frequencies lying above the transmission signal frequencies in the considered transmission branch are significantly attenuated.
  • the signal design frequencies are for example 132.5 kHz.
  • the band-stop filter BS in the present case is dimensioned such that it is exactly this Interference filters out.
  • Such interference signals can, for example, at 1.2 MHz and 1.46 MHz auftre ⁇ th, that is significantly above the transmission signal frequencies, and thereby have such amplitudes, which does not allow the low-pass filter TP alone sufficient to steam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters And Equalizers (AREA)

Abstract

L'invention concerne un circuit de suppression des signaux parasites dans des signaux d'émission qui sont émis par le modem (MO), comportant une branche d'émission et une branche de réception, d'un appareil électroménager (HG) équipé d'un dispositif d'émission et d'un dispositif de réception de signaux de données. La branche d'émission du modem (MO) comporte un filtre passe-bas (TP) permettant l'atténuation des signaux parasites cédés par un composant d'émission (SB) du modem (MO) ayant des fréquences de signaux parasites supérieures aux fréquences de signaux d'émission. De plus, un filtre coupe-bande (BS) qui extrait par filtrage uniquement les signaux parasites cités, est monté en amont du filtre passe-bas (TP) du côté du composant d'émission (SB)
EP05767987A 2004-07-15 2005-07-12 Circuit de suppression des signaux parasites dans des signaux d'emission emis par le modem d'un appareil electromenager Withdrawn EP1771952A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034328A DE102004034328A1 (de) 2004-07-15 2004-07-15 Schaltungsanordnung zur Unterdrückung von Störsignalen in von einem Modem eines Hausgerätes abgegebenen Sendesignalen
PCT/EP2005/053323 WO2006005750A1 (fr) 2004-07-15 2005-07-12 Circuit de suppression des signaux parasites dans des signaux d'emission emis par le modem d'un appareil electromenager

Publications (1)

Publication Number Publication Date
EP1771952A1 true EP1771952A1 (fr) 2007-04-11

Family

ID=34972858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05767987A Withdrawn EP1771952A1 (fr) 2004-07-15 2005-07-12 Circuit de suppression des signaux parasites dans des signaux d'emission emis par le modem d'un appareil electromenager

Country Status (6)

Country Link
US (1) US20070201542A1 (fr)
EP (1) EP1771952A1 (fr)
KR (1) KR20070032680A (fr)
CN (1) CN101099302A (fr)
DE (1) DE102004034328A1 (fr)
WO (1) WO2006005750A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039061A1 (de) * 2004-08-11 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes
DE102004039396A1 (de) * 2004-08-13 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes
JP5868976B2 (ja) 2011-07-13 2016-02-24 住友電気工業株式会社 通信システム及び通信装置
EP2733861A4 (fr) 2011-07-13 2016-07-13 Sumitomo Electric Industries Système et dispositif de communication
JP6047907B2 (ja) 2012-04-04 2016-12-21 株式会社オートネットワーク技術研究所 通信装置及び通信システム
CN106253951A (zh) * 2016-09-05 2016-12-21 国家电网公司 抑制干扰信号的方法、设备以及用电信息采集系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740244A1 (de) * 1977-09-07 1979-03-15 Bosch Gmbh Robert Aktives tiefpassfilter
US5072200A (en) * 1989-11-24 1991-12-10 Bela Ranky Combination of active and passive filters
US5179302A (en) * 1991-04-03 1993-01-12 Loral Aerospace Corp. Tunable data filter
FR2737623A1 (fr) * 1995-08-02 1997-02-07 Philips Electronics Nv Systeme de telecommunication au travers de lignes d'alimentation d'energie
EP1291956B1 (fr) * 1996-02-27 2005-12-07 Hitachi Metals, Ltd. Séparateur de fréquence pour des téléphones mobiles à deux bandes
US6396392B1 (en) * 2000-05-23 2002-05-28 Wire21, Inc. High frequency network communications over various lines
US6590493B1 (en) * 2000-12-05 2003-07-08 Nortel Networks Limited System, device, and method for isolating signaling environments in a power line communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006005750A1 *

Also Published As

Publication number Publication date
CN101099302A (zh) 2008-01-02
US20070201542A1 (en) 2007-08-30
KR20070032680A (ko) 2007-03-22
WO2006005750A1 (fr) 2006-01-19
DE102004034328A1 (de) 2006-02-02

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