JPS57159117A - Channel selection system - Google Patents
Channel selection systemInfo
- Publication number
- JPS57159117A JPS57159117A JP56043885A JP4388581A JPS57159117A JP S57159117 A JPS57159117 A JP S57159117A JP 56043885 A JP56043885 A JP 56043885A JP 4388581 A JP4388581 A JP 4388581A JP S57159117 A JPS57159117 A JP S57159117A
- Authority
- JP
- Japan
- Prior art keywords
- channel
- reception power
- circuit
- signal
- designated
- 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
- H03J1/0091—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with means for scanning over a band of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
PURPOSE:To achieve channel selection with accuracy and high speed, by comparing an analog value with a digital value through the A/D conversion of a reception power. CONSTITUTION:A reception power of a designated channel is A/D-converted at a reception power detection circuit 4 as a DC voltage. That is, a reception power corresponding to each channel is sequentially outputted as digital signal from an A/D conversion circuit 5 by switching channels sequentially through the change in a channel designation signal. When a channel is designated first, the first channel number and the reception power are stored in a storage circuit 6 with a storage renewal designation signal 9 from a processor. When the proces sor designates the next channel, an output of the A/D converter corresponding to the channel is compared with the reception power stored in the storage circuit 6 at a comparison circuit 7, a signal 10 as the result of comparison is fetched and the maximum reception power channel is determined by repeating the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56043885A JPS57159117A (en) | 1981-03-27 | 1981-03-27 | Channel selection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56043885A JPS57159117A (en) | 1981-03-27 | 1981-03-27 | Channel selection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57159117A true JPS57159117A (en) | 1982-10-01 |
Family
ID=12676156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56043885A Pending JPS57159117A (en) | 1981-03-27 | 1981-03-27 | Channel selection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57159117A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648838U (en) * | 1987-04-20 | 1989-01-18 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53112014A (en) * | 1977-03-11 | 1978-09-30 | Nippon Gakki Seizo Kk | Channel selection system for receivers |
| JPS54140402A (en) * | 1978-04-22 | 1979-10-31 | Clarion Co Ltd | Automatic preset tuning system for synthesizer receiver |
-
1981
- 1981-03-27 JP JP56043885A patent/JPS57159117A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53112014A (en) * | 1977-03-11 | 1978-09-30 | Nippon Gakki Seizo Kk | Channel selection system for receivers |
| JPS54140402A (en) * | 1978-04-22 | 1979-10-31 | Clarion Co Ltd | Automatic preset tuning system for synthesizer receiver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648838U (en) * | 1987-04-20 | 1989-01-18 |
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