GB1113373A - Improvements in or relating to television apparatus - Google Patents
Improvements in or relating to television apparatusInfo
- Publication number
- GB1113373A GB1113373A GB5182265A GB5182265A GB1113373A GB 1113373 A GB1113373 A GB 1113373A GB 5182265 A GB5182265 A GB 5182265A GB 5182265 A GB5182265 A GB 5182265A GB 1113373 A GB1113373 A GB 1113373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- amplifier
- signals
- amplified
- frequency
- 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
- 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
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
1,113,373. Multiplex radio signalling. RADIO CORPORATION OF AMERICA. 15 Nov., 1966 [7 Dec., 1965], No. 51822/65. Heading H4L. In a dual standard television receiver, such as one for the reception of 405-line V.H.F. signals and 625-line U.H.F. signals, separate tuners and intermediate frequency amplifiers are provided for each kind of signal, but the sound components at intermediate frequency of one kind of signal only are extracted and are amplified in the I.F. amplifier for the other kind of signal. As described, video signals at intermediate frequencies from the output of a V.H.F. 405-line tuner 10, Fig. 1, are amplified, detected, and further amplified in units 14, 22, 24, respectively. Audio signals at intermediate frequency are extracted by a tuned circuit (Fig. 2, not shown) and are taken to the input of a 625-line I.F. amplifier 16. The intermediate frequencies are so arranged that the 405-line sound carrier and its side-bands fall within the pass band of the 625-line intermediate amplifier and that the 405 video carrier and its sidebands lower in frequency than the sound carrier fall outside the pass band of the said amplifier. A unit 20 detects the output from the amplifier 16 and produces a 405-line audio frequency output. When the receiver is switched to 625- line working, the detector 20 produces 625-line sound signals at intercarrier frequency, and these are further amplified in a unit 26 and are finally detected in a unit 28. The 625-line video signals at intermediate frequencies from the output of the I.F. amplifier 16 are detected in a video detector 18 and are amplified in the unit 24, which is switched from the 405-line detector 22 when 625-line signals are being received.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5182265A GB1113373A (en) | 1965-12-07 | 1965-12-07 | Improvements in or relating to television apparatus |
FR85793A FR1504123A (en) | 1965-12-07 | 1966-12-01 | Improvements to television receivers |
BE690778D BE690778A (en) | 1965-12-07 | 1966-12-06 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5182265A GB1113373A (en) | 1965-12-07 | 1965-12-07 | Improvements in or relating to television apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1113373A true GB1113373A (en) | 1968-05-15 |
Family
ID=10461502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5182265A Expired GB1113373A (en) | 1965-12-07 | 1965-12-07 | Improvements in or relating to television apparatus |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE690778A (en) |
FR (1) | FR1504123A (en) |
GB (1) | GB1113373A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3525556A1 (en) * | 1984-07-18 | 1986-01-30 | Alps Electric Co., Ltd., Tokio/Tokyo | VOTING |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2367394A1 (en) * | 1976-10-11 | 1978-05-05 | Pizon Bros | Multi-standard television receiver circuit - automatically switches to UHF or VHF operation changing both IF and output stages |
-
1965
- 1965-12-07 GB GB5182265A patent/GB1113373A/en not_active Expired
-
1966
- 1966-12-01 FR FR85793A patent/FR1504123A/en not_active Expired
- 1966-12-06 BE BE690778D patent/BE690778A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3525556A1 (en) * | 1984-07-18 | 1986-01-30 | Alps Electric Co., Ltd., Tokio/Tokyo | VOTING |
Also Published As
Publication number | Publication date |
---|---|
FR1504123A (en) | 1967-12-01 |
BE690778A (en) | 1967-05-16 |
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