JPS5553918A - Channel selection device - Google Patents
Channel selection deviceInfo
- Publication number
- JPS5553918A JPS5553918A JP12771078A JP12771078A JPS5553918A JP S5553918 A JPS5553918 A JP S5553918A JP 12771078 A JP12771078 A JP 12771078A JP 12771078 A JP12771078 A JP 12771078A JP S5553918 A JPS5553918 A JP S5553918A
- Authority
- JP
- Japan
- Prior art keywords
- band
- selection
- channel selection
- amplifier
- input
- 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)
Abstract
PURPOSE: To ensure the channel selection covering the FM band to the TV and by selecting two electronic tuners with the output of the DC voltage generator.
CONSTITUTION: With selection of channel A through channel selection circuit 1, voltage Va is generated from voltage generator 2 to be applied to DC amplifier 6 and comparator 7 via diode 3 and integrating circuit 5. In this case, optional set value V0 is secured to define the FM band with the level under V0 and the TV band at the level over V0 respectively. Then the input of amplifier 6 is compared at comparator 7, and amplifier 6 features the gain and the shift amount for the FM band when the input is less than V0. At the same time, power change-over circuit 8 supplies the power to FM tuner 9 for selection of the FM band. In the same way, the TV band is selected in case the input is higher than the set value. Thus an automatic switching is secured between the FM and TV bands to carry out the channel selection through selection circuit 1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12771078A JPS5553918A (en) | 1978-10-17 | 1978-10-17 | Channel selection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12771078A JPS5553918A (en) | 1978-10-17 | 1978-10-17 | Channel selection device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5553918A true JPS5553918A (en) | 1980-04-19 |
Family
ID=14966786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12771078A Pending JPS5553918A (en) | 1978-10-17 | 1978-10-17 | Channel selection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5553918A (en) |
-
1978
- 1978-10-17 JP JP12771078A patent/JPS5553918A/en active Pending
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