JPS5733823A - Band switching circuit of electronic tuner in television receiver - Google Patents
Band switching circuit of electronic tuner in television receiverInfo
- Publication number
- JPS5733823A JPS5733823A JP10862180A JP10862180A JPS5733823A JP S5733823 A JPS5733823 A JP S5733823A JP 10862180 A JP10862180 A JP 10862180A JP 10862180 A JP10862180 A JP 10862180A JP S5733823 A JPS5733823 A JP S5733823A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- becomes
- band
- develops
- switching 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.)
- Granted
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
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To manufacture an electronic tuner at a low cost by using the parts in common, by adapting the band switching voltage to two different type electronic tuners which are mainly used at present. CONSTITUTION:In changeover switches SWVL, SWVH of a high band and a low band of the VHF band, when the SWVL is made an on-state, a diode D1 becomes off and a transistor (TR)Q10 also becomes off, therefore, no output develops to a terminal VH, and since a TRQ8 also becomes off, no output develops to a terminal VU either. On the other hand, a TRQ9 becomes on, an output develops to a terminal VV, a TRQ12 becomes on, an output develops to a terminal VL, and slso working voltage develops to a terminal VS, too. In this way, all voltage required for switching the electric tuner is obtained by two band changeover switches.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10862180A JPS5733823A (en) | 1980-08-07 | 1980-08-07 | Band switching circuit of electronic tuner in television receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10862180A JPS5733823A (en) | 1980-08-07 | 1980-08-07 | Band switching circuit of electronic tuner in television receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5733823A true JPS5733823A (en) | 1982-02-24 |
JPS6234290B2 JPS6234290B2 (en) | 1987-07-25 |
Family
ID=14489432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10862180A Granted JPS5733823A (en) | 1980-08-07 | 1980-08-07 | Band switching circuit of electronic tuner in television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5733823A (en) |
-
1980
- 1980-08-07 JP JP10862180A patent/JPS5733823A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6234290B2 (en) | 1987-07-25 |
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