• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to telecommunications. The purpose of the invention is to provide path isolation in a wide frequency band. A system comprising a signal current source 5, HhmeflaHC 6 and four resistors 7-10, is depicted on a transmission system in which both analog signals (voice, image) and digital signals (for example, data) can be transmitted to connect a two-wire line 1 sec. the transmitting path 2 and the receiving path 3 of the four-wire line 4 while simultaneously disconnecting both branches of the four-wire line 4 to each other. The goal is achieved by introducing the source 5 and the resistors 9 and 10. The system does not differ, respectively, by the resistance of the resistors 7-10, by making impedance 6 in the form of a KS circuit; using two-wire line 1 as the power supply for source 5; the implementation of the source 5 in the form of a field-effect transistor 11; the introduction of a voltage stabilizer 16, made in the form of a threshold e-ta; the introduction of adaptive transversal ml 15 and an additional field-effect transistor 12. 7 Cp f-ly, 2 ill. § (Y)
    公开号:SU1371514A3
    申请号:SU813290849
    申请日:1981-05-22
    公开日:1988-01-30
    发明作者:Бирт Винфрид
    申请人:Сименс Аг (Фирма)；
    IPC主号:
    专利说明:

     cm
    Phie, 2
    The invention relates to a transformerless differential system for connecting a two-wire line to a four-wire.
    The aim of the invention is to provide a path unfolding in a wide strip of charts.
    FIG. an electrical diagram of a two-wire, four-wire transmission system with a transformerless differential system is shown; 2 shows an exemplary embodiment of a differential system.
    The transformerless differential-if system in the transmitting system shown in Fig. 1, in which both analog signals (voice, image) and digital signals can be transmitted (for example, data) 20 for connecting two-wire line 1 with transmitting path 2 and receiving path 3 of the four-wire line 4 while simultaneously unleashing both four-wire line 4 with 25 each, contains a signal current source 5, impedance 6, first 7, second 8, third 9 and fourth 10 resistors, first field effect transistor 11, second
    transmitted signal 2
    iji, therefore
    a voltage appears (proportional to the transmitted current). Connected between the connection point of resistors 7 and 8 and the connection point of resistors 9 and 10, the receiving path 3 of the four-wire line 4 is loaded with a received signal corresponding to the intermediate value proportional to the current of the received signal between the voltage occurring on the two-wire line resistor 8 7 sources 5 current signal. At the same time, the mutual compensation of the voltages appearing on the resistors 7 and 8 proportional to the current of the transmitted signal is sufficient.
    to Rg K,
    2Rj.-R, (, moreover, the values of active resistances K and R must be large compared to the values of resistances Ry and R, therefore the influence of the current of the received CHI-igen through resistors 9 and 10 to the signal-current source 5 can be neglected.
    A parallel connection of an impedance field-effect transistor 12 (source 5 to 30 and 6, resistor 8 and a circuit from a signal source), a fifth resistor 13, a capacitor 14, an adaptive transverse filter 15 and a voltage regulator 16. Impedance 6 consists of sixth 17 and seventh 18 resistors and a second 19 and third 20 capacitors.
    Transformerless differential system works as follows.
    According to FIG. 1, the current of the transmitted signal 2 i, coming from the four-wire line 4 of the current source 5 that is controlled from the transmitting path 2, is divided into equal parts ig in the two-wire line I, impedance 6, resistor 8. Simultaneously through element 6 and resistor 8 The current of the received signal ig flows (the current source of the signal in Fig. 1 is not shown), so a voltage arises on the second resistor 8 of the impedance 6 of the two-wire line (Zj + R), which is proportional to the current of the received signal if RI and proportional to the current of the signal of the fraction i R, Resistor 7 connected in series with current source 5 only current flows
    transmitted signal 2
    iji, therefore
    a voltage appears (proportional to the transmitted current). Connected between the connection point of resistors 7 and 8 and the connection point of resistors 9 and 10, the receiving path 3 of the four-wire line 4 is loaded with a received signal corresponding to the intermediate value proportional to the current of the received signal between the voltage occurring on the two-wire line resistor 8 7 sources 5 current signal. At the same time, the mutual compensation of the voltages appearing on the resistors 7 and 8 proportional to the current of the transmitted signal is sufficient.
    to Rg K,
    2Rj.-R, (, moreover, the values of active resistances K and R must be large compared to the values of resistances Ry and R, therefore the influence of the current of the received CHI-igen through resistors 9 and 10 to the signal-current source 5 can be neglected.
    Parallel connection of impedance 6, resistor 8 and a circuit from a source
    With a current signal 5, a resistor 7 with a constant non-permissive current impedance 6 can also be used as a transition device (Fig. 2). At the same time, the supply current flows from line 1 through the signal current source 5. A field effect transistor 1 (temperature stable, durable against breakdown voltage) —a field effect transistor with a barrier layer and a high slope — can be powered, for example, from a microphone amplifier.
    The impedance 6 is made in the form of an RC circuit. Controls the inputs of the second field-effect transistor 12 are connected to the second output of the first resistor 7 and the first output of the third resistor 9, and the output cables are connected to the receiving path 3, from which resistor 13 through the capacitor 14 receives the received signal for the receiving path 3. Parallel to the resistor 9, an adaptive transverse is connected
    filter 15, at the output of which an echo cancellation signal is generated.
    A voltage regulator 16 is connected between the alternating current-connected resistors 7 and 8;
    in the form of a threshold element, which produces an operating voltage Ug for transmitting 2 and receiving 3 paths of the four-wire line 4 and for the differential system itself.
    权利要求:
    Claims (8)
    [1]
    1. A transformerless differential system, containing the first and second resistors and impedances, is such that, in order to provide isolation of paths in a wide frequency band, the signal current source, the third and fourth resistors, and the inputs of the source the signal current is connected to the transmitting path, the outputs of the current signal source are connected to the first impedance and the first resistor, respectively, while the first impedance lead is connected to the first two-wire path, the second wire of which is connected the first output of the second resistor, the second output of the first resistor and the first wire of the receive path, the second wire of which is connected to the first terminals of the third and fourth resistors, the second output of the third resistor is connected to the first output of the first resistor, and the second output of the fourth resistor is connected respectively to the second the leads of the balance element and the second resistor, with the product of the resistances of the second and third resistors and the double product of the resistances of the first and
    the fourth resistors are different not
    more than ten times.
    about
    13715144
    [2]
    2. Pop-up system 1, characterized in that the resistance of the second resistor is equal to the double resistance of the first resistor, and the third and fourth resistors have the same resistance.
    [3]
    3. Pop-1 system, characterized in that the impedance is made in the form of an RC circuit.
    [4]
    4. Pop-up system 1, characterized in that the two-wire path is feeding for the current signal source.
    [5]
    5. The system according to claim, characterized in that the current source of the signal is made in the form of a field-effect transistor, the control electrode of which is connected to one of the wires of the transmitting path, and the source is connected to the first resistor.
    [6]
    6. A pop-up system 1, characterized in that between the second terminal of the first resistor and the first terminal of the second resistor a voltage regulator is included, made in the form of a threshold element.
    [7]
    7. Pop-1 system, characterized in that an adaptive transversal filter is connected in parallel with the third resistor.
    [8]
    8. The non.l system differs from the fact that an additional field-effect transistor is introduced, the control inputs of which are connected to the second terminal of the first resistor and the first terminal of the third resistor, and the outputs are connected to the receiving path.
    Fis. one
    类似技术:
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    IE811646L|1982-01-23|Circuit arrangement
    US4358644A|1982-11-09|Bilateral current source for a multi-terminal intercom
    US3987253A|1976-10-19|Hybrid coupling for telecommunication system
    US4445006A|1984-04-24|Four-wire conversion circuit for a telephone subscriber line
    US4387277A|1983-06-07|Four wire to two wire converter
    US4622442A|1986-11-11|Electronic hybrid having synthesized impedance circuitry
    同族专利:
    公开号 | 公开日
    DK226381A|1981-11-24|
    EP0040785A1|1981-12-02|
    JPS5713825A|1982-01-23|
    DE3019835C2|1983-12-01|
    US4418249A|1983-11-29|
    CA1171565A|1984-07-24|
    JPS6342977B2|1988-08-26|
    DK151997C|1988-07-18|
    EP0040785B1|1983-05-18|
    DK151997B|1988-01-18|
    AT3487T|1983-06-15|
    DE3019835A1|1981-12-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3453395A|1965-12-01|1969-07-01|Gen Electric|Solid-state hybrid|
    US3529099A|1967-05-10|1970-09-15|Itt|Telephone subset with resistive hybrid network|
    GB1241037A|1968-07-26|1971-07-28|Telefongyar|A circuit arrangement|
    DE1762849B2|1968-09-10|1980-02-07|Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm|Transformer-free bridge circuit|
    DE1963507A1|1969-12-18|1971-06-24|Licentia Gmbh|Transformerless hybrid circuit for connecting a two-wire and a four-wire line|
    US3751602A|1971-08-13|1973-08-07|Bell Telephone Labor Inc|Loudspeaking telephone|
    DE2159149C3|1971-11-29|1978-08-31|Siemens Ag, 1000 Berlin Und 8000 Muenchen|Circuit arrangement for centrally fed subscriber stations with speech circuits containing a resistor bridge|
    BE792329A|1971-12-09|1973-06-06|Int Standard Electric Corp|ELECTRONIC TRANSMISSION CIRCUIT FOR TELEPHONE STATION|
    DE2607480C2|1976-02-20|1982-11-25|Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin|Circuit arrangement for a fork|
    FR2404344B1|1977-09-27|1981-06-26|Jeumont Schneider|
    DE2807785A1|1978-02-23|1979-08-30|Siemens Ag|DIGITAL NEWS TRANSMISSION SYSTEM|
    US4174470A|1978-10-10|1979-11-13|Bell Telephone Laboratories, Incorporated|Electronic hybrid|
    US4228323A|1979-01-31|1980-10-14|Bell Telephone Laboratories, Incorporated|Variable loop length compensated barrier circuit|
    DE2916576C3|1979-04-24|1981-12-10|Siemens AG, 1000 Berlin und 8000 München|Digital telecommunication system for two-wire remote location operation|
    DE2921019C2|1979-05-23|1981-06-19|Siemens AG, 1000 Berlin und 8000 München|Digital telecommunications system with at least one four-wire line section|US5010399A|1989-07-14|1991-04-23|Inline Connection Corporation|Video transmission and control system utilizing internal telephone lines|
    US6243446B1|1997-03-11|2001-06-05|Inline Connections Corporation|Distributed splitter for data transmission over twisted wire pairs|
    JPH0375370U|1989-11-27|1991-07-29|
    NL1000486C2|1995-06-02|1996-12-03|Nederland Ptt|Fork circuit for twisted pair transmission line|
    DE19828337A1|1998-06-25|1999-12-30|Bosch Gmbh Robert|Telecommunication device|
    US6532279B1|1999-06-11|2003-03-11|David D. Goodman|High-speed data communication over a residential telephone wiring network|
    US8385538B2|2008-12-10|2013-02-26|Utc Fire & Security Americas Corporation, Inc.|Method, system, and apparatus for a differential transformer-free hybrid circuit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3019835A|DE3019835C2|1980-05-23|1980-05-23|Transformer-free hybrid connection|
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