FR2368828A1 - Dispositif d'accord perfectionne pour recepteur de television - Google Patents
Dispositif d'accord perfectionne pour recepteur de televisionInfo
- Publication number
- FR2368828A1 FR2368828A1 FR7731352A FR7731352A FR2368828A1 FR 2368828 A1 FR2368828 A1 FR 2368828A1 FR 7731352 A FR7731352 A FR 7731352A FR 7731352 A FR7731352 A FR 7731352A FR 2368828 A1 FR2368828 A1 FR 2368828A1
- Authority
- FR
- France
- Prior art keywords
- television receiver
- perfected
- tuning device
- mixer
- driven
- 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
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
Abstract
L'invention concerne les récepteurs de télévision. L'étage d'entrée haute fréquence d'un récepteur de télévision comprend essentiellement un circuit de régulation de niveau 2, trois amplificateurs 4, 5, 6 correspondant à des bandes de réception différentes, un premier melangeur 13 attaqué par un oscillateur à fréquence variable 14, et un second mélangeur 15 attaqué par un oscillateur à fréquence fixe 16. Le fondamental de l'oscillateur 14 couvre la bande VHF, et son harmonique d'ordre 2 couvre la bande UHF. Application à l'accord des récepteurs de télévision.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6956576A IT1071537B (it) | 1976-10-25 | 1976-10-25 | Dispositivo per la sintonizzazione di un televisione |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2368828A1 true FR2368828A1 (fr) | 1978-05-19 |
FR2368828B1 FR2368828B1 (fr) | 1984-02-17 |
Family
ID=11312397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7731352A Granted FR2368828A1 (fr) | 1976-10-25 | 1977-10-18 | Dispositif d'accord perfectionne pour recepteur de television |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2747691A1 (fr) |
FR (1) | FR2368828A1 (fr) |
GB (1) | GB1584737A (fr) |
IT (1) | IT1071537B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3633384A1 (de) * | 1986-10-01 | 1988-04-14 | Telefunken Electronic Gmbh | Fernsehtuner fuer drei unterschiedliche frequenzbereiche |
EP0883238A2 (fr) * | 1997-06-03 | 1998-12-09 | Robert Bosch Gmbh | Récepteur pour différentes bandes de fréquence |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3703406A1 (de) * | 1987-02-05 | 1988-08-18 | Philips Patentverwaltung | Kombinierter zf-saug- und parallelkreis fuer einen fernseh-tuner |
DE4132907A1 (de) * | 1991-10-04 | 1993-04-08 | Thomson Brandt Gmbh | Filteranordnung |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787703A (en) * | 1952-03-03 | 1957-04-02 | Philips Corp | Receiver for two radio frequency bands |
FR1496827A (fr) * | 1966-08-26 | 1967-10-06 | Radiotechnique Coprim Rtc | Perfectionnements aux récepteurs de télévision |
US3624514A (en) * | 1970-01-09 | 1971-11-30 | Philips Corp | Tuning circuit having common tuning element for three frequency ranges and self-oscillating mixer using same |
US3801915A (en) * | 1971-03-04 | 1974-04-02 | Magnavox Co | Method and apparatus for converting electrical signals |
US3939429A (en) * | 1973-07-07 | 1976-02-17 | U.S. Philips Corporation | Tunable high frequency input circuit for a television receiver that tunes both VHF and UHF channels and can be readily integrated |
-
1976
- 1976-10-25 IT IT6956576A patent/IT1071537B/it active
-
1977
- 1977-10-18 FR FR7731352A patent/FR2368828A1/fr active Granted
- 1977-10-18 GB GB4331877A patent/GB1584737A/en not_active Expired
- 1977-10-25 DE DE19772747691 patent/DE2747691A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787703A (en) * | 1952-03-03 | 1957-04-02 | Philips Corp | Receiver for two radio frequency bands |
FR1496827A (fr) * | 1966-08-26 | 1967-10-06 | Radiotechnique Coprim Rtc | Perfectionnements aux récepteurs de télévision |
US3624514A (en) * | 1970-01-09 | 1971-11-30 | Philips Corp | Tuning circuit having common tuning element for three frequency ranges and self-oscillating mixer using same |
US3801915A (en) * | 1971-03-04 | 1974-04-02 | Magnavox Co | Method and apparatus for converting electrical signals |
US3939429A (en) * | 1973-07-07 | 1976-02-17 | U.S. Philips Corporation | Tunable high frequency input circuit for a television receiver that tunes both VHF and UHF channels and can be readily integrated |
Non-Patent Citations (2)
Title |
---|
EXBK/75 * |
EXRV/76 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3633384A1 (de) * | 1986-10-01 | 1988-04-14 | Telefunken Electronic Gmbh | Fernsehtuner fuer drei unterschiedliche frequenzbereiche |
EP0883238A2 (fr) * | 1997-06-03 | 1998-12-09 | Robert Bosch Gmbh | Récepteur pour différentes bandes de fréquence |
EP0883238A3 (fr) * | 1997-06-03 | 1999-01-20 | Robert Bosch Gmbh | Récepteur pour différentes bandes de fréquence |
Also Published As
Publication number | Publication date |
---|---|
IT1071537B (it) | 1985-04-10 |
FR2368828B1 (fr) | 1984-02-17 |
GB1584737A (en) | 1981-02-18 |
DE2747691A1 (de) | 1978-04-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CA | Change of address | ||
TP | Transmission of property | ||
ST | Notification of lapse |