JPS5516532A - Automatic tuning radio set - Google Patents
Automatic tuning radio setInfo
- Publication number
- JPS5516532A JPS5516532A JP8879278A JP8879278A JPS5516532A JP S5516532 A JPS5516532 A JP S5516532A JP 8879278 A JP8879278 A JP 8879278A JP 8879278 A JP8879278 A JP 8879278A JP S5516532 A JPS5516532 A JP S5516532A
- Authority
- JP
- Japan
- Prior art keywords
- dividing ratio
- tuner
- control circuit
- counter
- frequency
- 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
Abstract
PURPOSE: To increase a search speed by realizing accurate signal detection by making the search speed the best in an intermediate band and slower in low and high bands.
CONSTITUTION: Once dividing ratio (n) is supplied from control circuit 7 to programmable counter 52, an oscillation frequency from VCO51 is diveced by (n). Then, PLL frequency synthesizer 5 is locked after constant time elapses and the locking of dividing ratio (n) is done. Lock detection circuit 11 exercises supervision over phase detector 54 and when a phase difference is elemiminated between frequency outputs of counter 52 and reference oscillator 53, it is judged that lock detection circuit 11 is in a locking state, thereby sending signals out to control circuit 7. In this locking state, a local oscillation frequency is supplied to mixer part of tuner 2 and a directcurrent voltage from loop filter 55 is to varactor diode 2a of tuner 2 to amplify selectively the high frequency. When the tuner does not get tuned, control circuit 7 increases dividing ratio (n) after the set time of delay circuit 10 and sends a new dividing ratio to counter 52, thereby continuing the same processes.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8879278A JPS5857927B2 (en) | 1978-07-20 | 1978-07-20 | auto tune radio |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8879278A JPS5857927B2 (en) | 1978-07-20 | 1978-07-20 | auto tune radio |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5516532A true JPS5516532A (en) | 1980-02-05 |
JPS5857927B2 JPS5857927B2 (en) | 1983-12-22 |
Family
ID=13952689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8879278A Expired JPS5857927B2 (en) | 1978-07-20 | 1978-07-20 | auto tune radio |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5857927B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06296144A (en) * | 1993-04-01 | 1994-10-21 | Fujitsu Ten Ltd | Radio receiver |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60525U (en) * | 1983-06-15 | 1985-01-05 | オ−バル機器工業株式会社 | Flow meter installation structure |
JPS6011028U (en) * | 1983-07-01 | 1985-01-25 | オ−バル機器工業株式会社 | flangeless flowmeter |
JPS6011027U (en) * | 1983-07-01 | 1985-01-25 | オ−バル機器工業株式会社 | flangeless flowmeter |
-
1978
- 1978-07-20 JP JP8879278A patent/JPS5857927B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06296144A (en) * | 1993-04-01 | 1994-10-21 | Fujitsu Ten Ltd | Radio receiver |
JP2655986B2 (en) * | 1993-04-01 | 1997-09-24 | 富士通テン株式会社 | Radio receiver |
Also Published As
Publication number | Publication date |
---|---|
JPS5857927B2 (en) | 1983-12-22 |
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