JPH0439735U - - Google Patents
Info
- Publication number
- JPH0439735U JPH0439735U JP8156990U JP8156990U JPH0439735U JP H0439735 U JPH0439735 U JP H0439735U JP 8156990 U JP8156990 U JP 8156990U JP 8156990 U JP8156990 U JP 8156990U JP H0439735 U JPH0439735 U JP H0439735U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- predetermined
- receiving circuit
- automatic sweeping
- reception
- 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
- 238000010408 sweeping Methods 0.000 claims 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は、本考案のラジオ受信機のブロツク図
、第２図は、同じく振幅検波回路の動作説明図、
第３図は、同じく振幅検波回路の出力信号の検出
レベルの説明図、第４図は、同じく制御回路に書
き込まれた要部のプログラムのフローチヤートで
ある。
６……局部発振回路、９……自動掃引キー、１
０……制御回路。
FIG. 1 is a block diagram of the radio receiver of the present invention, and FIG. 2 is an explanatory diagram of the operation of the amplitude detection circuit.
FIG. 3 is an explanatory diagram of the detection level of the output signal of the amplitude detection circuit, and FIG. 4 is a flowchart of the main part of the program written in the control circuit. 6...Local oscillation circuit, 9...Auto sweep key, 1
0...Control circuit.
Claims (1)
と、該受信回路に局間周波数毎の周波数情報を与
えて自動掃引を行ない、受信レベルが所定値以上
且つ中間周波信号が所定の周波数である時に自動
掃引を停止する制御手段とを有するものにおいて
、前記制御手段は、受信レベルが所定値以上で、
中間周波信号が所定の周波数でない場合、少なく
ともその受信周波数の前後に所定周波数分の帯域
について局間周波数より小さい値毎に前記受信回
路に周波数情報を与え自動掃引を行なうことを特
徴とするラジオ受信機。 A receiving circuit whose local oscillator circuit is a PLL circuit, and frequency information for each inter-office frequency is given to the receiving circuit to perform automatic sweeping, and automatic sweeping is performed when the reception level is above a predetermined value and the intermediate frequency signal is at a predetermined frequency. and control means for stopping the sweep, wherein the control means controls when the reception level is equal to or higher than a predetermined value;
If the intermediate frequency signal does not have a predetermined frequency, radio reception is characterized in that frequency information is given to the receiving circuit for each value smaller than the inter-office frequency for at least a predetermined frequency band before and after the reception frequency, and automatic sweeping is performed. Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8156990U JPH0439735U (en) | 1990-07-31 | 1990-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8156990U JPH0439735U (en) | 1990-07-31 | 1990-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0439735U true JPH0439735U (en) | 1992-04-03 |
Family
ID=31627633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8156990U Pending JPH0439735U (en) | 1990-07-31 | 1990-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439735U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607221A (en) * | 1983-06-27 | 1985-01-16 | Toshiba Corp | Digital tuning system |
-
1990
- 1990-07-31 JP JP8156990U patent/JPH0439735U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607221A (en) * | 1983-06-27 | 1985-01-16 | Toshiba Corp | Digital tuning system |
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