DE3469122D1 - Method and apparatus for the detection of a transition of the direct current component of a periodic signal, in particular for subscriber loop interface circuits - Google Patents
Method and apparatus for the detection of a transition of the direct current component of a periodic signal, in particular for subscriber loop interface circuitsInfo
- Publication number
- DE3469122D1 DE3469122D1 DE8484402100T DE3469122T DE3469122D1 DE 3469122 D1 DE3469122 D1 DE 3469122D1 DE 8484402100 T DE8484402100 T DE 8484402100T DE 3469122 T DE3469122 T DE 3469122T DE 3469122 D1 DE3469122 D1 DE 3469122D1
- Authority
- DE
- Germany
- Prior art keywords
- transition
- detection
- direct current
- current component
- periodic 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8316647A FR2553893B1 (fr) | 1983-10-19 | 1983-10-19 | Procede et dispositif de detection d'une transition de la composante continue d'un signal periodique, notamment pour joncteur telephonique |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3469122D1 true DE3469122D1 (en) | 1988-03-03 |
Family
ID=9293308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484402100T Expired DE3469122D1 (en) | 1983-10-19 | 1984-10-18 | Method and apparatus for the detection of a transition of the direct current component of a periodic signal, in particular for subscriber loop interface circuits |
Country Status (5)
Country | Link |
---|---|
US (1) | US4645881A (de) |
EP (1) | EP0139594B1 (de) |
JP (1) | JPH0626381B2 (de) |
DE (1) | DE3469122D1 (de) |
FR (1) | FR2553893B1 (de) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6219015B1 (en) * | 1992-04-28 | 2001-04-17 | The Board Of Directors Of The Leland Stanford, Junior University | Method and apparatus for using an array of grating light valves to produce multicolor optical images |
US5841579A (en) * | 1995-06-07 | 1998-11-24 | Silicon Light Machines | Flat diffraction grating light valve |
US5982553A (en) * | 1997-03-20 | 1999-11-09 | Silicon Light Machines | Display device incorporating one-dimensional grating light-valve array |
US6088102A (en) * | 1997-10-31 | 2000-07-11 | Silicon Light Machines | Display apparatus including grating light-valve array and interferometric optical system |
US6271808B1 (en) | 1998-06-05 | 2001-08-07 | Silicon Light Machines | Stereo head mounted display using a single display device |
US6154724A (en) * | 1998-06-23 | 2000-11-28 | Advanced Micro Devices, Inc. | Energy based pulse position detector for telephone wire networks |
US6130770A (en) * | 1998-06-23 | 2000-10-10 | Silicon Light Machines | Electron gun activated grating light valve |
US6101036A (en) * | 1998-06-23 | 2000-08-08 | Silicon Light Machines | Embossed diffraction grating alone and in combination with changeable image display |
US6215579B1 (en) | 1998-06-24 | 2001-04-10 | Silicon Light Machines | Method and apparatus for modulating an incident light beam for forming a two-dimensional image |
US6303986B1 (en) | 1998-07-29 | 2001-10-16 | Silicon Light Machines | Method of and apparatus for sealing an hermetic lid to a semiconductor die |
DE19934055C2 (de) * | 1999-07-19 | 2001-06-13 | Siemens Ag | Verfahren zum Ermitteln von Amplitude und Phasenwinkel eines einem Strom oder einer Spannung eines elektrischen Energieversorgungsnetzes entsprechenden Meßsignals |
US6956878B1 (en) | 2000-02-07 | 2005-10-18 | Silicon Light Machines Corporation | Method and apparatus for reducing laser speckle using polarization averaging |
US6707591B2 (en) | 2001-04-10 | 2004-03-16 | Silicon Light Machines | Angled illumination for a single order light modulator based projection system |
US6782205B2 (en) | 2001-06-25 | 2004-08-24 | Silicon Light Machines | Method and apparatus for dynamic equalization in wavelength division multiplexing |
US6747781B2 (en) | 2001-06-25 | 2004-06-08 | Silicon Light Machines, Inc. | Method, apparatus, and diffuser for reducing laser speckle |
US6829092B2 (en) | 2001-08-15 | 2004-12-07 | Silicon Light Machines, Inc. | Blazed grating light valve |
US6785001B2 (en) * | 2001-08-21 | 2004-08-31 | Silicon Light Machines, Inc. | Method and apparatus for measuring wavelength jitter of light signal |
US6800238B1 (en) | 2002-01-15 | 2004-10-05 | Silicon Light Machines, Inc. | Method for domain patterning in low coercive field ferroelectrics |
US6767751B2 (en) | 2002-05-28 | 2004-07-27 | Silicon Light Machines, Inc. | Integrated driver process flow |
US6728023B1 (en) | 2002-05-28 | 2004-04-27 | Silicon Light Machines | Optical device arrays with optimized image resolution |
US6822797B1 (en) | 2002-05-31 | 2004-11-23 | Silicon Light Machines, Inc. | Light modulator structure for producing high-contrast operation using zero-order light |
US6829258B1 (en) | 2002-06-26 | 2004-12-07 | Silicon Light Machines, Inc. | Rapidly tunable external cavity laser |
US6813059B2 (en) | 2002-06-28 | 2004-11-02 | Silicon Light Machines, Inc. | Reduced formation of asperities in contact micro-structures |
US6714337B1 (en) | 2002-06-28 | 2004-03-30 | Silicon Light Machines | Method and device for modulating a light beam and having an improved gamma response |
US6801354B1 (en) | 2002-08-20 | 2004-10-05 | Silicon Light Machines, Inc. | 2-D diffraction grating for substantially eliminating polarization dependent losses |
US7057795B2 (en) * | 2002-08-20 | 2006-06-06 | Silicon Light Machines Corporation | Micro-structures with individually addressable ribbon pairs |
US6712480B1 (en) | 2002-09-27 | 2004-03-30 | Silicon Light Machines | Controlled curvature of stressed micro-structures |
US6806997B1 (en) | 2003-02-28 | 2004-10-19 | Silicon Light Machines, Inc. | Patterned diffractive light modulator ribbon for PDL reduction |
US6829077B1 (en) | 2003-02-28 | 2004-12-07 | Silicon Light Machines, Inc. | Diffractive light modulator with dynamically rotatable diffraction plane |
US7933713B2 (en) * | 2006-03-17 | 2011-04-26 | Ford Global Technologies, Llc | Control of peak engine output in an engine with a knock suppression fluid |
US7524331B2 (en) * | 2006-04-06 | 2009-04-28 | Medtronic Vascular, Inc. | Catheter delivered valve having a barrier to provide an enhanced seal |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3312787A (en) * | 1963-10-17 | 1967-04-04 | Stromberg Carlson Corp | Signaling system |
US3730999A (en) * | 1971-10-26 | 1973-05-01 | Stromberg Carlson Corp | Telephone ring-trip circuit |
US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
US4132864A (en) * | 1977-04-28 | 1979-01-02 | International Business Machines Corporation | Digital measurement of the DC value in an AC signal adapted to telephone off-hook detection |
IT1128374B (it) * | 1980-02-19 | 1986-05-28 | Cselt Centro Studi Lab Telecom | Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio |
IT1155661B (it) * | 1982-03-24 | 1987-01-28 | Cselt Centro Studi Lab Telecom | Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata |
US4447675A (en) * | 1982-10-29 | 1984-05-08 | Bell Telephone Laboratories, Incorporated | Ring-trip detector |
-
1983
- 1983-10-19 FR FR8316647A patent/FR2553893B1/fr not_active Expired
-
1984
- 1984-10-18 EP EP84402100A patent/EP0139594B1/de not_active Expired
- 1984-10-18 DE DE8484402100T patent/DE3469122D1/de not_active Expired
- 1984-10-19 US US06/662,860 patent/US4645881A/en not_active Expired - Fee Related
- 1984-10-19 JP JP59220300A patent/JPH0626381B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2553893A1 (fr) | 1985-04-26 |
EP0139594B1 (de) | 1988-01-27 |
US4645881A (en) | 1987-02-24 |
JPH0626381B2 (ja) | 1994-04-06 |
EP0139594A1 (de) | 1985-05-02 |
FR2553893B1 (fr) | 1986-02-07 |
JPS60107960A (ja) | 1985-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |