JPS5467301A - Channel selector - Google Patents
Channel selectorInfo
- Publication number
- JPS5467301A JPS5467301A JP13342477A JP13342477A JPS5467301A JP S5467301 A JPS5467301 A JP S5467301A JP 13342477 A JP13342477 A JP 13342477A JP 13342477 A JP13342477 A JP 13342477A JP S5467301 A JPS5467301 A JP S5467301A
- Authority
- JP
- Japan
- Prior art keywords
- lpf15
- voltage
- during
- channel
- time constant
- 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 obtain a channel-selection tuning voltage, and to shorten an automatic preset time by making the time constant of a LPF, obtaining a tuning voltage, during channel-selecting operation differ from that during preset operation.
CONSTITUTION: During normal channel-selecting operation, capacitor 31 is interposed between the output terminal of LPF15 and the ground through the operation of switch 30 to increase its time constant, and a mean DC voltage is obtained with the ripple of the input voltage of LPF15 suppressed, thereby supplying a stable tuning voltage to tuner 19. During automatic preset operation, on the other hand, the time constant of LPF15 is decreased through the operation of switch 30 so as to increase the input voltage of LPF15 by a pulse voltage whose pulse width increases continuously with the pulse amplitude constant at the input terminal of LPF15, so that the preset operation can be done in a short time.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13342477A JPS5467301A (en) | 1977-11-09 | 1977-11-09 | Channel selector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13342477A JPS5467301A (en) | 1977-11-09 | 1977-11-09 | Channel selector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5467301A true JPS5467301A (en) | 1979-05-30 |
Family
ID=15104442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13342477A Pending JPS5467301A (en) | 1977-11-09 | 1977-11-09 | Channel selector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5467301A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59188224A (en) * | 1983-04-08 | 1984-10-25 | Matsushita Electric Ind Co Ltd | Electronic channel selecting circuit |
JP2015194690A (en) * | 2014-03-21 | 2015-11-05 | 日本精機株式会社 | Head-up display device |
-
1977
- 1977-11-09 JP JP13342477A patent/JPS5467301A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59188224A (en) * | 1983-04-08 | 1984-10-25 | Matsushita Electric Ind Co Ltd | Electronic channel selecting circuit |
JPH0225566B2 (en) * | 1983-04-08 | 1990-06-04 | Matsushita Electric Ind Co Ltd | |
JP2015194690A (en) * | 2014-03-21 | 2015-11-05 | 日本精機株式会社 | Head-up display device |
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