JPS5549028A - Radio receiver - Google Patents
Radio receiverInfo
- Publication number
- JPS5549028A JPS5549028A JP12150578A JP12150578A JPS5549028A JP S5549028 A JPS5549028 A JP S5549028A JP 12150578 A JP12150578 A JP 12150578A JP 12150578 A JP12150578 A JP 12150578A JP S5549028 A JPS5549028 A JP S5549028A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- circuit
- level
- signal
- sweep
- 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 make it possible to select automatically another channel when a channel in reception weakens in electric-field intensity, by providing a radio receiver with an automatic channel selection start switch, local oscillation frequency sweep unit, trigger signal detection circuit, and timer circuit.
CONSTITUTION: Local oscillation frequency sweep unit 22 is driven by operating automatic channel selection start switch 21 to sweep local oscillation 13 and when one frequency is received and the level of intermediate frequency amplifier 15 exceeds a fixed value, trigger signal detection circuit 23 detects the state and supplies its detection signal to unit 22. Unit 22 stops sweeping by level "L" of the signal, so that an excellent reception state can be obtained. When magnetic-field intensity lowers to a level circuit 23 can not detect, the detection signal becomes "H" in level and count operation of timer circuit 32 is started. On counting pulses to a set time, circuit 32 generate a restart signal and then input it to unit 22 for a re-sweep, and automatic channel selection is so made that a signal high in electric field intensity will be received.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12150578A JPS5549028A (en) | 1978-10-04 | 1978-10-04 | Radio receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12150578A JPS5549028A (en) | 1978-10-04 | 1978-10-04 | Radio receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549028A true JPS5549028A (en) | 1980-04-08 |
Family
ID=14812846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12150578A Pending JPS5549028A (en) | 1978-10-04 | 1978-10-04 | Radio receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549028A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60132426A (en) * | 1983-12-21 | 1985-07-15 | Fujitsu Ten Ltd | Tuning system of electronic tuning type car radio |
JPS60155579A (en) * | 1984-01-25 | 1985-08-15 | イビデン株式会社 | Ceramic-casted metal composite body and manufacture |
JPH0457920U (en) * | 1990-09-25 | 1992-05-19 |
-
1978
- 1978-10-04 JP JP12150578A patent/JPS5549028A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60132426A (en) * | 1983-12-21 | 1985-07-15 | Fujitsu Ten Ltd | Tuning system of electronic tuning type car radio |
JPH026257B2 (en) * | 1983-12-21 | 1990-02-08 | Fujitsu Ten Ltd | |
JPS60155579A (en) * | 1984-01-25 | 1985-08-15 | イビデン株式会社 | Ceramic-casted metal composite body and manufacture |
JPH0457920U (en) * | 1990-09-25 | 1992-05-19 |
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