JPS55130220A - Stop signal device for automatic tuning of broadcast receiver - Google Patents
Stop signal device for automatic tuning of broadcast receiverInfo
- Publication number
- JPS55130220A JPS55130220A JP3904279A JP3904279A JPS55130220A JP S55130220 A JPS55130220 A JP S55130220A JP 3904279 A JP3904279 A JP 3904279A JP 3904279 A JP3904279 A JP 3904279A JP S55130220 A JPS55130220 A JP S55130220A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- stop signal
- supplied
- detection
- intermediate 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/18—Automatic scanning over a band of frequencies
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE:To obtain the stop signal which gives discontinuation to the frequency sweep action of the automatic tuning system of the receiver at the optimum tuning point and by means of the intermediate frequency signal of the narrow band and obtained through the mixing conversion of the intermediate frequency of FM and the intermediate frequency of FM. CONSTITUTION:The signal of IF (10.7MHz) of FM is applied to mixer 7, and at the same time the signal of 11.150MHz sent from crystal oscillation circuit 6 is injected also to mixer 7 to receive the mixing conversion into the signal of IF450KHz of AM. And the output is supplied to the ceramic filter of the narrow band with the central frequency of 450KHz as well as to IF amplifier 8. The output of amplifier 8 is supplied to detection part 9 to give smoothing to the AC component into the DC component. With such signal, the switched signal is obtained. On the other hand, the detection output given from FM detection circuit 10 is supplied to comparator 11, and signal S11 is delivered when the detection level enters the range of the upper and lower limit set levels. When both signals S10 and S11 feature the high level each, stop signal S12 is obtained from logic circuit 12 to prevent stop signal S12 from being caused by the noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3904279A JPS55130220A (en) | 1979-03-30 | 1979-03-30 | Stop signal device for automatic tuning of broadcast receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3904279A JPS55130220A (en) | 1979-03-30 | 1979-03-30 | Stop signal device for automatic tuning of broadcast receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55130220A true JPS55130220A (en) | 1980-10-08 |
Family
ID=12542058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3904279A Pending JPS55130220A (en) | 1979-03-30 | 1979-03-30 | Stop signal device for automatic tuning of broadcast receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55130220A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164331U (en) * | 1982-04-28 | 1983-11-01 | パイオニア株式会社 | automatic tuning receiver |
| EP0788226A1 (en) * | 1996-02-02 | 1997-08-06 | TEMIC TELEFUNKEN microelectronic GmbH | Radio receiver circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151507A (en) * | 1976-06-12 | 1977-12-16 | Clarion Co Ltd | Tuning detecting circuit |
-
1979
- 1979-03-30 JP JP3904279A patent/JPS55130220A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151507A (en) * | 1976-06-12 | 1977-12-16 | Clarion Co Ltd | Tuning detecting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164331U (en) * | 1982-04-28 | 1983-11-01 | パイオニア株式会社 | automatic tuning receiver |
| EP0788226A1 (en) * | 1996-02-02 | 1997-08-06 | TEMIC TELEFUNKEN microelectronic GmbH | Radio receiver circuit |
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