Analog isolation system with digital communication across a capa

Details Analog isolation system with digital communication across a capa Analog isolation system with digital communication across a capa

1997-04-22

1999-02-09

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

379412, H03M 302

Patent

active

058700463

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. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry 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 may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply 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. 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.

REFERENCES:
patent: 4053720 (1977-10-01), Wycheck
patent: 4192978 (1980-03-01), Vincent
patent: 4292595 (1981-09-01), Smith
patent: 4417099 (1983-11-01), Pierce
patent: 4529845 (1985-07-01), Boeckmann
patent: 4540854 (1985-09-01), Beirne
patent: 4567331 (1986-01-01), Martin
patent: 4644526 (1987-02-01), Wu
patent: 4741031 (1988-04-01), Grandstaff
patent: 4757528 (1988-07-01), Falater et al.
patent: 4835486 (1989-05-01), Somerville
patent: 4843339 (1989-06-01), Burt et al.
patent: 4864605 (1989-09-01), Ramsay et al.
patent: 4901275 (1990-02-01), Hardie et al.
patent: 4993063 (1991-02-01), Kiko
patent: 4995111 (1991-02-01), Tojo et al.
patent: 5097503 (1992-03-01), Cotty
patent: 5136630 (1992-08-01), Breneman et al.
patent: 5204896 (1993-04-01), Oliver
patent: 5235634 (1993-08-01), Oliver
patent: 5245654 (1993-09-01), Wilkison et al.
patent: 5287107 (1994-02-01), Gampell et al.
patent: 5329281 (1994-07-01), Baumgartner et al.
patent: 5329585 (1994-07-01), Susak et al.
patent: 5369666 (1994-11-01), Folwell et al.
patent: 5410594 (1995-04-01), Maruyama
patent: 5428682 (1995-06-01), Apfel
patent: 5500894 (1996-03-01), Hershbarger
patent: 5500895 (1996-03-01), Yurgelites
patent: 5602912 (1997-02-01), Hershbarger
patent: 5655010 (1997-08-01), Bingel
patent: 5692041 (1997-11-01), Torazzina
Information Sheet--Siemens, DAA2000 Optical DAA Kit--Preliminary, pp. 1-21; Jun. 13, 1997.
Siemens Press Release, Siemens Pioneers Programmable Front End For Analog Modems Single Design For Worldwide Standards, Aug. 6, 1997.
Information Sheet--Siemens, ICs for Communications, ALIS Reference Board, SIPB 4595 Version 1.0, Technical Description 06.97, Q67220-H1014, Jun. 1997.
Information Sheet--Siemens, ICs for Communications, ALIS Evaluation Board, SIPB 45900 Version 1.1, Technical Description 06.97, Q67220-H1047, Jun. 1997.
Information Sheet--Siemens, ALIS--Development Tools Evaluation Board, pp. 1-3, Jul. 21, 1997.
Lucent Technologies, LUCL8576 Dual Subscriber Line Interface Circuit, Advanced Data Sheet Issue 1.3, 16 pages, Jan. 8, 1997.
Siemens, "ICs For Communications" Analog Line Interface Solution ALIS, PSB 4595 Version 2.0 and PSB 4596 Version 2.1 Product Overview 08.97, 19 pages (1997).
Krypton, "K.sup.2 930G Functional and Electrical Descriptions", 10 pages (1997).
Boser et al., The Design of Sigma-Delta Modulation Analog-to-Digital Converters, IEEE J. Solid-State Circuits, vol. SC-23, pp. 1298-1308, Dec. 1988.
Candy,A Use of Double Integration in Sigma Delta Modulation, IEEE Trans. Commun., vol. COM-33, pp. 249-258, Mar. 1985.
Naus, et al.,A CMOS Stereo 16-bit D/A Converter for Digital Audio, IEEE J. Solid-State Circuits, vol. SC-22, pp. 390-395, Jun. 1987.
Silicon Systems,SSI 73D2950/2950T, Low Power FAX/Data Modem Chip Set Advance Information, pp. 4-75-4-105, Dec. 1993.

Affiliated with

Also associated with

Rating

Analog isolation system with digital communication across a capa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Analog isolation system with digital communication across a capa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog isolation system with digital communication across a capa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1953135