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Direct digital access arrangement circuitry and method for connecting to phone lines

Info

Publication number
WO1998048541A3
WO1998048541A3 PCT/US1998/008116 US9808116W WO1998048541A3 WO 1998048541 A3 WO1998048541 A3 WO 1998048541A3 US 9808116 W US9808116 W US 9808116W WO 1998048541 A3 WO1998048541 A3 WO 1998048541A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
digital
barrier
isolation
data
provided
Prior art date
Application number
PCT/US1998/008116
Other languages
French (fr)
Other versions
WO1998048541A2 (en )
Inventor
Jeffrey W Scott
Navdeep S Sooch
David R Welland
Original Assignee
Jeffrey W Scott
Silicon Lab Inc
Navdeep S Sooch
David R Welland
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/57Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H04M1/573Line monitoring circuits for detecting caller identification
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0264Arrangements for coupling to transmission lines
    • H04L25/0266Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/06Dc level restoring means; Bias distortion correction decision circuits providing symbol by symbol detection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/738Interface circuits for coupling substations to external telephone lines
    • H04M1/76Compensating for differences in line impedance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and telegraphic or other data transmission over the same conductors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/001Current supply source at the exchanger providing current to substations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone, busy tone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/005Interface circuits for subscriber lines
    • H04M3/007Access interface units for simultaneous transmission of speech and data, e.g. digital subscriber line [DSL] access interface units
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/02Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/033Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop

Abstract

An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated (209, 210). The system provides a means of communication (225) across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry (216) may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters (201, 208) may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply (220) may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors (209, 110). In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.
PCT/US1998/008116 1997-04-22 1998-04-21 Direct digital access arrangement circuitry and method for connecting to phone lines WO1998048541A3 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US08837714 US6430229B1 (en) 1997-04-22 1997-04-22 Capacitive isolation system with digital communication and power transfer
US08841409 US6137827A (en) 1997-04-22 1997-04-22 Isolation system with digital communication across a capacitive barrier
US08837702 US5870046A (en) 1997-04-22 1997-04-22 Analog isolation system with digital communication across a capacitive barrier
US08/837,714 1998-03-04
US09/035,175 1998-03-04
US08/837,702 1998-03-04
US09035175 US6385235B1 (en) 1997-04-22 1998-03-04 Direct digital access arrangement circuitry and method for connecting to phone lines
US08/841,409 1998-03-04

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1998627941 DE69827941T2 (en) 1997-04-22 1998-04-21 random access digital circuit means and methods for connection with telephone-lines
DE1998922049 DE978190T1 (en) 1997-04-22 1998-04-21 random access digital circuit means and methods for connection with telephone-lines
DE1998627941 DE69827941D1 (en) 1997-04-22 1998-04-21 random access digital circuit means and methods for connection with telephone-lines
JP54631298A JP4054068B2 (en) 1997-04-22 1998-04-21 The method and digital direct access arrangement circuitry for connection to the telephone line
EP19980922049 EP0978190B1 (en) 1997-04-22 1998-04-21 Direct digital access arrangement circuitry and method for connecting to phone lines

Publications (2)

Publication Number Publication Date
WO1998048541A2 true WO1998048541A2 (en) 1998-10-29
WO1998048541A3 true true WO1998048541A3 (en) 1999-03-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/008116 WO1998048541A3 (en) 1997-04-22 1998-04-21 Direct digital access arrangement circuitry and method for connecting to phone lines

Country Status (6)

Country Link
US (7) US6385235B1 (en)
JP (1) JP4054068B2 (en)
KR (1) KR100380790B1 (en)
DE (5) DE978190T1 (en)
EP (2) EP1418739B1 (en)
WO (1) WO1998048541A3 (en)

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US7301995B2 (en) 2007-11-27 grant
US20040161024A1 (en) 2004-08-19 application
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US20040161023A1 (en) 2004-08-19 application
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US7200167B2 (en) 2007-04-03 grant
US20060215771A1 (en) 2006-09-28 application
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US7463675B2 (en) 2008-12-09 grant
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US7283584B2 (en) 2007-10-16 grant
US20030002571A1 (en) 2003-01-02 application
US20020154702A1 (en) 2002-10-24 application

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