JPS5488712A - Vhf television tuner - Google Patents
Vhf television tunerInfo
- Publication number
- JPS5488712A JPS5488712A JP15691377A JP15691377A JPS5488712A JP S5488712 A JPS5488712 A JP S5488712A JP 15691377 A JP15691377 A JP 15691377A JP 15691377 A JP15691377 A JP 15691377A JP S5488712 A JPS5488712 A JP S5488712A
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- circuit
- band
- constitution
- filter
- 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.)
- Pending
Links
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Abstract
PURPOSE: To reduce the number of resonant circuit as a whole, to simplify the constitution, and to make small the unit in size, by constituting the high frequency input tuning circuit and the high frequency in-stage tuning circuit with the VHF low band and high band circuits respectively.
CONSTITUTION: The signal input is tured in high frequency with the high frequency input tuning circuit 33, and after high frequency amplification 34, it is tuned 33 with high frequency stages, is mixed 37 with the output of the local oscillating circuit 39, and the output is fed to the IF amplifying circuit 36 via the IF filter 41. In this case, the circuit 33 becomes the broad band tuning circuit in common use for the VHF low and high band. It also consists of the narrow band VHF low and high band fixed tuning circuits, and the IF filter 41 is of narrow band filter. Thus, the number of resonant circuits can be reduced as a whole, the constitution is simplified and the size can be made smaller.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15691377A JPS5488712A (en) | 1977-12-26 | 1977-12-26 | Vhf television tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15691377A JPS5488712A (en) | 1977-12-26 | 1977-12-26 | Vhf television tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5488712A true JPS5488712A (en) | 1979-07-14 |
Family
ID=15638110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15691377A Pending JPS5488712A (en) | 1977-12-26 | 1977-12-26 | Vhf television tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5488712A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6055137U (en) * | 1983-09-24 | 1985-04-18 | シャープ株式会社 | VHF tuner high frequency amplifier circuit |
-
1977
- 1977-12-26 JP JP15691377A patent/JPS5488712A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6055137U (en) * | 1983-09-24 | 1985-04-18 | シャープ株式会社 | VHF tuner high frequency amplifier circuit |
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