JPS5742222A - Tuner - Google Patents
TunerInfo
- Publication number
- JPS5742222A JPS5742222A JP11754180A JP11754180A JPS5742222A JP S5742222 A JPS5742222 A JP S5742222A JP 11754180 A JP11754180 A JP 11754180A JP 11754180 A JP11754180 A JP 11754180A JP S5742222 A JPS5742222 A JP S5742222A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- tuning
- tuner
- conductive
- lower limit
- 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 surely prevent the reception of unnecessary electromagnetic waves adjacent without change of tuner, by supplying a voltage of specified value as a tuning voltage, when a tuning voltage applied to an electronic tuner is a given value or lower. CONSTITUTION:In a television receiver using an electronic tuner, when band changeover switches 8-11 are changed over to the VHF terminal, a transistor (TR)52 is conductive, a lower limit voltage set TR46 of a tuning variable range is cut off and the lower limit voltage is not generated. When the switches 8-11 are changed over to the UHF terminal, the TR52 is cut off, the TR46 is conductive, and when a tuning voltage set by tuning variable resistors 17-20 is lower than a voltage set by a variable resistor 43, a switching diode 49 is conductive and a voltage at a tuning voltage output terminal 26 is kept at a lower limit voltage set by the resistor 43. Thus, the standard tuner is used as it is and the reception of the adjacent specific electromagnetic waves can be prevented surely.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11754180A JPS5742222A (en) | 1980-08-26 | 1980-08-26 | Tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11754180A JPS5742222A (en) | 1980-08-26 | 1980-08-26 | Tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5742222A true JPS5742222A (en) | 1982-03-09 |
Family
ID=14714343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11754180A Pending JPS5742222A (en) | 1980-08-26 | 1980-08-26 | Tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5742222A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6031244A (en) * | 1983-08-01 | 1985-02-18 | Oki Electric Ind Co Ltd | Semiconductor device |
-
1980
- 1980-08-26 JP JP11754180A patent/JPS5742222A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6031244A (en) * | 1983-08-01 | 1985-02-18 | Oki Electric Ind Co Ltd | Semiconductor device |
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