FR2434520A1 - Circuit de verification et de controle des coefficients d'un egalisateur adaptable analogique - Google Patents
Circuit de verification et de controle des coefficients d'un egalisateur adaptable analogiqueInfo
- Publication number
- FR2434520A1 FR2434520A1 FR7920773A FR7920773A FR2434520A1 FR 2434520 A1 FR2434520 A1 FR 2434520A1 FR 7920773 A FR7920773 A FR 7920773A FR 7920773 A FR7920773 A FR 7920773A FR 2434520 A1 FR2434520 A1 FR 2434520A1
- Authority
- FR
- France
- Prior art keywords
- coefficients
- elements
- control
- equalizer
- value
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/14—Control of transmission; Equalising characterised by the equalising network used
- H04B3/142—Control of transmission; Equalising characterised by the equalising network used using echo-equalisers, e.g. transversal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Networks Using Active Elements (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
Circuit de vérification et de contrôle des coefficients d'un égalisateur adaptable transversal analogique. Il comprend, pour assurer ledit contrôle des coefficients, deux éléments de résistance, variables sous commande indirecte, insérés dans un réseau formant pont de contrôle différentiel, lequel est susceptible d'imposer une variation des résistances des éléments de façon complémentaire, sur la base de la valeur d'une tension d'attaque variable fournie à l'égalisateur de façon connue. Pour assurer le contrôle en temps réel des valeurs de résistance desdits éléments, il comprend un réseau de rétroaction apte à maintenir la valeur de résistance desdits éléments stable et définie par rapport à la valeur de la tension d'attaque.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT7868977A IT1115581B (it) | 1978-08-25 | 1978-08-25 | Circuito di comando e di controllo dei coefficienti di un equalizzatore adattativo di tipo analogico |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2434520A1 true FR2434520A1 (fr) | 1980-03-21 |
FR2434520B1 FR2434520B1 (fr) | 1984-01-20 |
Family
ID=11311060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7920773A Granted FR2434520A1 (fr) | 1978-08-25 | 1979-08-16 | Circuit de verification et de controle des coefficients d'un egalisateur adaptable analogique |
Country Status (9)
Country | Link |
---|---|
US (1) | US4241320A (fr) |
JP (1) | JPS5531395A (fr) |
CA (1) | CA1141443A (fr) |
DE (1) | DE2933840C2 (fr) |
FR (1) | FR2434520A1 (fr) |
GB (1) | GB2029176B (fr) |
IT (1) | IT1115581B (fr) |
NL (1) | NL183971C (fr) |
SE (1) | SE438759B (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4161913B2 (ja) * | 2004-02-16 | 2008-10-08 | ソニー株式会社 | 正弦波乗算回路及び正弦波乗算方法 |
US8018323B2 (en) * | 2006-01-30 | 2011-09-13 | Baohua Qi | RFID sensor device based on pulse-processing |
US8013714B2 (en) * | 2006-03-27 | 2011-09-06 | Baohua Qi | RFID sensor using pulse processing |
US8026795B2 (en) * | 2007-02-22 | 2011-09-27 | Baohua Qi | RFID sensor array and sensor group based on pulse-processing |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3321719A (en) * | 1962-12-21 | 1967-05-23 | Bell Telephone Labor Inc | Apparatus facilitating adjustment of equalizers |
US3436671A (en) * | 1965-01-19 | 1969-04-01 | Marconi Co Ltd | Gain and attenuation control circuit arrangements |
DE1762219A1 (de) * | 1968-04-30 | 1970-04-30 | Siemens Ag | Verstaerker mit regelbarem Verstaerkungsgrad |
US3624562A (en) * | 1969-03-26 | 1971-11-30 | Fujitsu Ltd | Automatic equalizer for random input signals |
US3882330A (en) * | 1972-04-13 | 1975-05-06 | Plessey Handel Investment Ag | Circuit arrangements |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3735275A (en) * | 1970-06-18 | 1973-05-22 | Columbia Broadcasting Syst Inc | Dynamic presence filter |
CA901104A (en) * | 1970-11-04 | 1972-05-23 | Her Majesty The Queen, In Right Of Canada As Represented By The Minister Of Natural Resources Canada | Phase-locked tracking filter |
-
1978
- 1978-08-25 IT IT7868977A patent/IT1115581B/it active
-
1979
- 1979-08-14 SE SE7906783A patent/SE438759B/sv not_active IP Right Cessation
- 1979-08-16 FR FR7920773A patent/FR2434520A1/fr active Granted
- 1979-08-16 GB GB7928522A patent/GB2029176B/en not_active Expired
- 1979-08-21 DE DE2933840A patent/DE2933840C2/de not_active Expired
- 1979-08-22 JP JP10613679A patent/JPS5531395A/ja active Granted
- 1979-08-23 US US06/069,130 patent/US4241320A/en not_active Expired - Lifetime
- 1979-08-23 NL NLAANVRAGE7906376,A patent/NL183971C/xx not_active IP Right Cessation
- 1979-08-24 CA CA000334647A patent/CA1141443A/fr not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3321719A (en) * | 1962-12-21 | 1967-05-23 | Bell Telephone Labor Inc | Apparatus facilitating adjustment of equalizers |
US3436671A (en) * | 1965-01-19 | 1969-04-01 | Marconi Co Ltd | Gain and attenuation control circuit arrangements |
DE1762219A1 (de) * | 1968-04-30 | 1970-04-30 | Siemens Ag | Verstaerker mit regelbarem Verstaerkungsgrad |
US3624562A (en) * | 1969-03-26 | 1971-11-30 | Fujitsu Ltd | Automatic equalizer for random input signals |
US3882330A (en) * | 1972-04-13 | 1975-05-06 | Plessey Handel Investment Ag | Circuit arrangements |
Also Published As
Publication number | Publication date |
---|---|
NL183971C (nl) | 1989-03-01 |
US4241320A (en) | 1980-12-23 |
JPS6221410B2 (fr) | 1987-05-12 |
IT1115581B (it) | 1986-02-03 |
NL7906376A (nl) | 1980-02-27 |
DE2933840A1 (de) | 1980-02-28 |
SE438759B (sv) | 1985-04-29 |
SE7906783L (sv) | 1980-02-26 |
GB2029176A (en) | 1980-03-12 |
FR2434520B1 (fr) | 1984-01-20 |
DE2933840C2 (de) | 1982-09-23 |
GB2029176B (en) | 1982-11-17 |
IT7868977A0 (it) | 1978-08-25 |
CA1141443A (fr) | 1983-02-15 |
JPS5531395A (en) | 1980-03-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |