JPS57166723A - Automatic sweep receiver - Google Patents
Automatic sweep receiverInfo
- Publication number
- JPS57166723A JPS57166723A JP5260281A JP5260281A JPS57166723A JP S57166723 A JPS57166723 A JP S57166723A JP 5260281 A JP5260281 A JP 5260281A JP 5260281 A JP5260281 A JP 5260281A JP S57166723 A JPS57166723 A JP S57166723A
- Authority
- JP
- Japan
- Prior art keywords
- sweep
- frequency
- reception
- stop signal
- broadcast
- 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
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
- H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop
Abstract
PURPOSE:To perform reception at some station by a receiver which automatically sweeps and select the reception station, by increasing a sweep speed where no reception state resides, and then stopping the sweep at the reception station securely even when the sweep is high by reducing the sweep speed as the reception station comes close. CONSTITUTION:For the reception of some broadcast during the reception of another broadcast, when an up sweep key among input keys 9 is operated, a control circuit 5 increases the frequency division ratio data of a programmable frequency divider 2 by one and then the oscillation frequency of a voltage-controlled oscillator 3 is increased by 50kHz to start searching for whether there is a broadcast or not. After data conversion, the control circuit 5 discriminates wheher a stop signal S1 is generated at a sweep stop signal input terminal T1 or not and when there is not the signal S1, the frequency division ratio data is increased again by one to set a 50kHz higher frequency. When a broadcast arrives at a frequency (f), a stop signal S1 is detected at a f-150kHz frequency and a sweep is stopped for a prescribed time; and then the presence of a stop signal S2 is discriminated and the frequency division ratio is increased by one to set a f-100kHz frequency. Thus, an stepwise advance is made up to the frequency (f) and the sweep is stopped by the signal S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5260281A JPS57166723A (en) | 1981-04-07 | 1981-04-07 | Automatic sweep receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5260281A JPS57166723A (en) | 1981-04-07 | 1981-04-07 | Automatic sweep receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57166723A true JPS57166723A (en) | 1982-10-14 |
Family
ID=12919329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5260281A Pending JPS57166723A (en) | 1981-04-07 | 1981-04-07 | Automatic sweep receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57166723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0215490A2 (en) * | 1985-09-19 | 1987-03-25 | Matsushita Electric Industrial Co., Ltd. | A.F.C. system for broad-band FM receiver |
-
1981
- 1981-04-07 JP JP5260281A patent/JPS57166723A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0215490A2 (en) * | 1985-09-19 | 1987-03-25 | Matsushita Electric Industrial Co., Ltd. | A.F.C. system for broad-band FM receiver |
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