JPS56160130A - Limiting circuit for tuning range of electronic tuner - Google Patents
Limiting circuit for tuning range of electronic tunerInfo
- Publication number
- JPS56160130A JPS56160130A JP17366479A JP17366479A JPS56160130A JP S56160130 A JPS56160130 A JP S56160130A JP 17366479 A JP17366479 A JP 17366479A JP 17366479 A JP17366479 A JP 17366479A JP S56160130 A JPS56160130 A JP S56160130A
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- electronic tuner
- limiting
- circuit
- limiting circuit
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
- H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To give a limitation, when necessary, to the tuning range of an electronic tuner, by limiting the variable range of the tuning voltage to be applied to a varactor diode. CONSTITUTION:A VHF high band is selected by a tuner control circuit 3, and then the maximum value of a maximum limit voltage setting variable resistance VR1 is set at the upper limit frequency along with the minimum value of a minimum limit voltage setting variable resistance VR2 set at the lower limit frequency, respectively. Accordingly, an electronic tuner 1 is impossible to receive an outside cable band. Then a VHF low band is selected by the circuit 3, and thus no selection signal VH is applied to a tuning limiting circuit 11. As a result, no limiting action is given to the tuning voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17366479A JPS56160130A (en) | 1979-12-27 | 1979-12-27 | Limiting circuit for tuning range of electronic tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17366479A JPS56160130A (en) | 1979-12-27 | 1979-12-27 | Limiting circuit for tuning range of electronic tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56160130A true JPS56160130A (en) | 1981-12-09 |
Family
ID=15964803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17366479A Pending JPS56160130A (en) | 1979-12-27 | 1979-12-27 | Limiting circuit for tuning range of electronic tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56160130A (en) |
-
1979
- 1979-12-27 JP JP17366479A patent/JPS56160130A/en active Pending
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