FR2454237A1 - TV tuner and IF stage screening housing - has UHF and VHF tuners mixers and IF stages completely screened and internally individually further screened - Google Patents
TV tuner and IF stage screening housing - has UHF and VHF tuners mixers and IF stages completely screened and internally individually further screenedInfo
- Publication number
- FR2454237A1 FR2454237A1 FR8008224A FR8008224A FR2454237A1 FR 2454237 A1 FR2454237 A1 FR 2454237A1 FR 8008224 A FR8008224 A FR 8008224A FR 8008224 A FR8008224 A FR 8008224A FR 2454237 A1 FR2454237 A1 FR 2454237A1
- Authority
- FR
- France
- Prior art keywords
- screened
- tuner
- stages
- metal
- mixers
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/4446—IF amplifier circuits specially adapted for B&W TV
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Structure Of Receivers (AREA)
- Television Receiver Circuits (AREA)
Abstract
The TV receiver has a tuner and IF stages in screened metal housing to avoid interference. The tuner (2) and IF stages (3) are combined and housed in a complete metal units (1) which is internally partitioned (4, 5, 6, 7) with metal to provide further screening to individual circuits. The tuner (2) being screened from filters (8) and amplifier (9) of the quasi-parallel type. The metal unit (1) has further internal metal screen partitions (13-21), for the UHF input stage (22, 23, 24), the band filter (25) and the mixer stage (26) individually. VHF received signals are fed through VHF input stages (27, 28), band filters (29) and mixers (31) again in separate screen compartments (14, 15, 17 etc). A phase regulator (32) is also separately screened (5, 6, 7) in the main unit (1).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792914985 DE2914985A1 (en) | 1979-04-12 | 1979-04-12 | TELEVISION RECEPTION LEVEL |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2454237A1 true FR2454237A1 (en) | 1980-11-07 |
Family
ID=6068252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8008224A Withdrawn FR2454237A1 (en) | 1979-04-12 | 1980-04-11 | TV tuner and IF stage screening housing - has UHF and VHF tuners mixers and IF stages completely screened and internally individually further screened |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5612118A (en) |
DE (1) | DE2914985A1 (en) |
FR (1) | FR2454237A1 (en) |
IT (1) | IT1141537B (en) |
ZA (1) | ZA802085B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026885A1 (en) * | 1999-02-04 | 2000-08-09 | Alps Electric Co., Ltd. | TV-signal receiving tuner with reduced extraneous emission |
-
1979
- 1979-04-12 DE DE19792914985 patent/DE2914985A1/en not_active Withdrawn
-
1980
- 1980-04-09 IT IT21252/80A patent/IT1141537B/en active
- 1980-04-09 ZA ZA00802085A patent/ZA802085B/en unknown
- 1980-04-11 FR FR8008224A patent/FR2454237A1/en not_active Withdrawn
- 1980-04-11 JP JP4695080A patent/JPS5612118A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026885A1 (en) * | 1999-02-04 | 2000-08-09 | Alps Electric Co., Ltd. | TV-signal receiving tuner with reduced extraneous emission |
US6639630B2 (en) | 1999-02-04 | 2003-10-28 | Alps Electric Co., Ltd. | TV-signal receiving tuner with reduced extraneous emission |
Also Published As
Publication number | Publication date |
---|---|
ZA802085B (en) | 1981-04-29 |
DE2914985A1 (en) | 1980-10-16 |
IT8021252A0 (en) | 1980-04-09 |
JPS5612118A (en) | 1981-02-06 |
IT1141537B (en) | 1986-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |