JPH09504154A - データ端末装置を回線から分離する回線インタフェース装置およびその方法 - Google Patents
データ端末装置を回線から分離する回線インタフェース装置およびその方法Info
- Publication number
- JPH09504154A JPH09504154A JP8506471A JP50647195A JPH09504154A JP H09504154 A JPH09504154 A JP H09504154A JP 8506471 A JP8506471 A JP 8506471A JP 50647195 A JP50647195 A JP 50647195A JP H09504154 A JPH09504154 A JP H09504154A
- Authority
- JP
- Japan
- Prior art keywords
- line
- data signal
- mixer
- high frequency
- signal
- 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.)
- Ceased
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
- 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
- H04L25/0268—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling with modulation and subsequent demodulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
-
- 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
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
-
- 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
-
- 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
- H04B2203/5491—Systems for power line communications using filtering and bypassing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Small-Scale Networks (AREA)
- Dc Digital Transmission (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.データ端末装置を回線に結合する回線インタフェース回路(100)であっ て、前記データ端末装置が前記回線上でデータ信号を受信する回路において: (a)前記回線に結合され、前記データ信号を受信し、前記データ信号を高周 波数データ信号(110)に変換する第1ミキサ(102); (b)前記第1ミキサに結合され、前記高周波数データ信号を分離して、分離 高周波数データ信号(112)を生成する電圧分離回路(104);および (c)前記電圧分離回路と前記データ端末装置とに結合され、前記分離高周波 数データ信号を低周波数の分離データ信号(132)に変換する第2ミキサ(1 06); によって構成されることを特徴とする回線インタフェース回路。 2.前記電圧分離回路は、前記第1ミキサと前記第2ミキサとの間で接続された 高電圧コンデンサによって構成されることを特徴とする請求項1記載の回線イン タフェース回路。 3.前記第1ミキサは二重平衡ミキサであることを特徴とする請求項1記載の回 線インタフェース回路。 4.前記第2ミキサは二重平衡ミキサであることを特徴とする請求項1記載の回 線インタフェース回路。 5.前記低周波数の分離データ信号は、前記データ信号の周波数スペクトルとほ ぼ同一の周波数スペクトルを有することを特徴とする請求項1記載の回線インタ フェース回路。 6.前記第1ミキサは、局部発振器入力結合(140)をさらに有し、前記局部 発振器入力結合は、発振器(208)から分離するための分離手段を有し、前記 第1ミキサは、前記発振器から分離高周波数信号を受信することを特徴とする請 求項1記載の回線インタフェース回路。 7.前記第2ミキサは、局部発振器入力結合(141)をさらに有し、前記局部 発振器入力結合は、発振器(208)から高周波数信号を受信することを特徴と する請求項1記載の回線インタフェース回路。 8.回線とデータ端末装置を結合する回線インタフェース回路(100)であっ て、前記回線がデータ信号を有する回線であって: (a)前記回線に結合され、前記データ信号を受信するミキサ(102)であ って、前記ミキサは、前記データ信号を高周波数データ信号(110)に変換す る手段を有するミキサ(102); (b)前記回線から前記高周波数データ信号を分離する分離手段であって、前 記分離手段は前記ミキサに結合され、それにより分離高周波数データ信号を生成 する分離手段;および (c)前記分離高周波数データ信号を分離低周波数デー タ信号に変換する変換手段であって、前記分離手段に結合される変換手段; によって構成されることを特徴とする回線インタフェース回路。 9.前記分離手段は、前記ミキサと前記変換手段との間に接続された高電圧コン デンサ(105)によって構成されることを特徴とする請求項8記載の回線イン タフェース回路。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/284,023 US5574749A (en) | 1994-08-01 | 1994-08-01 | Line interface apparatus and method for isolating data terminal equipment from the line |
US08/284,023 | 1994-08-01 | ||
PCT/US1995/006516 WO1996004715A1 (en) | 1994-08-01 | 1995-05-23 | Line interface apparatus and method for isolating data terminal equipment from the line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09504154A true JPH09504154A (ja) | 1997-04-22 |
Family
ID=23088564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8506471A Ceased JPH09504154A (ja) | 1994-08-01 | 1995-05-23 | データ端末装置を回線から分離する回線インタフェース装置およびその方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5574749A (ja) |
EP (1) | EP0721702A4 (ja) |
JP (1) | JPH09504154A (ja) |
CN (1) | CN1131481A (ja) |
BR (1) | BR9506298A (ja) |
CA (1) | CA2171455A1 (ja) |
WO (1) | WO1996004715A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5841467A (en) * | 1996-02-01 | 1998-11-24 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Ground isolation circuit for isolating a transmission line from ground interference |
US6587560B1 (en) | 1997-04-22 | 2003-07-01 | Silicon Laboratories Inc. | Low voltage circuits powered by the phone line |
US6104794A (en) * | 1997-04-22 | 2000-08-15 | Silicon Laboratories, Inc. | Architecture for minimum loop current during ringing and caller ID |
US6205218B1 (en) * | 1997-04-28 | 2001-03-20 | Lucent Technologies, Inc. | Extended feedback circuit for impedance matching and voltage isolation |
US6169801B1 (en) | 1998-03-16 | 2001-01-02 | Midcom, Inc. | Digital isolation apparatus and method |
US6031583A (en) * | 1998-06-09 | 2000-02-29 | Eastman Kodak Company | High frequency video isolation system |
DE19845123B4 (de) * | 1998-09-30 | 2006-04-13 | Infineon Technologies Ag | Vorrichtung zum galvanisch getrennten Verbinden einer Telefonleitung mit einer Signalverarbeitungseinrichtung am Teilnehmerende der Telefonleitung |
US7218713B1 (en) | 2003-04-15 | 2007-05-15 | Silicon Laboratories Inc. | Telephone line interface for DAA circuitry |
CN100442059C (zh) * | 2004-05-21 | 2008-12-10 | 特克特朗尼克公司 | 在电子测试仪器中用于将输入信道隔离的装置 |
US8170138B2 (en) * | 2007-07-24 | 2012-05-01 | John Pinkney | Signal generator and method |
US8208866B2 (en) * | 2008-08-05 | 2012-06-26 | Broadcom Corporation | RF transceiver front-end with RX/TX isolation |
CN108667448B (zh) * | 2017-03-30 | 2022-02-18 | 研华股份有限公司 | 具有隔离单元的接口转换装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3593042A (en) * | 1968-09-23 | 1971-07-13 | Itt | R. f. coupled line receiver with d. c. isolation |
US3622895A (en) * | 1970-02-26 | 1971-11-23 | Gte Sylvania Inc | Universal digital line receiver employing frequency conversion to achieve isolation |
US4536681A (en) * | 1983-07-19 | 1985-08-20 | Minnesota Mining And Manufacturing Company | Temperature compensated time exposure control circuit |
US4536618A (en) * | 1983-10-14 | 1985-08-20 | Novation, Inc. | Telephone line interface |
US4598173A (en) * | 1984-10-15 | 1986-07-01 | Itt Corporation | Interface circuit for a subscriber line circuit |
-
1994
- 1994-08-01 US US08/284,023 patent/US5574749A/en not_active Expired - Lifetime
-
1995
- 1995-05-23 CN CN95190713.1A patent/CN1131481A/zh active Pending
- 1995-05-23 WO PCT/US1995/006516 patent/WO1996004715A1/en not_active Application Discontinuation
- 1995-05-23 CA CA002171455A patent/CA2171455A1/en not_active Abandoned
- 1995-05-23 BR BR9506298A patent/BR9506298A/pt not_active Application Discontinuation
- 1995-05-23 EP EP95919910A patent/EP0721702A4/en not_active Withdrawn
- 1995-05-23 JP JP8506471A patent/JPH09504154A/ja not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
MX9601253A (es) | 1998-06-30 |
EP0721702A4 (en) | 2000-07-05 |
WO1996004715A1 (en) | 1996-02-15 |
US5574749A (en) | 1996-11-12 |
EP0721702A1 (en) | 1996-07-17 |
BR9506298A (pt) | 1997-08-12 |
CN1131481A (zh) | 1996-09-18 |
CA2171455A1 (en) | 1996-02-15 |
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A313 | Final decision of rejection without a dissenting response from the applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A313 Effective date: 20041018 |
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