JPS5939550U - IF band variable AM radio - Google Patents
IF band variable AM radioInfo
- Publication number
- JPS5939550U JPS5939550U JP13466682U JP13466682U JPS5939550U JP S5939550 U JPS5939550 U JP S5939550U JP 13466682 U JP13466682 U JP 13466682U JP 13466682 U JP13466682 U JP 13466682U JP S5939550 U JPS5939550 U JP S5939550U
- Authority
- JP
- Japan
- Prior art keywords
- filter circuit
- intermediate frequency
- radio
- band variable
- frequency bandwidth
- 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
Landscapes
- Noise Elimination (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図乃至第３図および第６図は本考案を説明するため
の特性図、第４図および第５図は共に従来例を示す回路
図、第７図は本考案実施例を示す回路図、第８図乃至第
１４図はいずれも本考案の結果を示す特性図である。
２・・・チューナ部、３，４・・・中間周波増幅段、７
・・・ＡＧＣアンプ、ＣＦ１．ＣＦ２・・・セラミック
フィルタ、Ｃ□〜Ｃ３・・・コンデンサ、Ｑ２〜Ｑ、・
・・トランジスタ、Ｒ□〜Ｒ１，・・・抵抗、Ｆ□、Ｆ
２・・・フィルタ回路。Figures 1 to 3 and 6 are characteristic diagrams for explaining the present invention, Figures 4 and 5 are circuit diagrams showing conventional examples, and Figure 7 is a circuit diagram showing an embodiment of the present invention. , and FIGS. 8 to 14 are characteristic diagrams showing the results of the present invention. 2... Tuner section, 3, 4... Intermediate frequency amplification stage, 7
...AGC amplifier, CF1. CF2...Ceramic filter, C□~C3...Capacitor, Q2~Q,・
...Transistor, R□~R1,...Resistance, F□, F
2...filter circuit.
Claims (1)
限周波数成分を通過させ得る第１のフィルタ回路および
上限周波数成分を通過させ得る第２のフィルタ回路と共
に受信信号を通過させ得る結合回路にスイッチ手段を設
け、上記第１のフィルタ回路、第２のフィルタ回路およ
び結合回路の各々に入力された該当信号のいずれもが弱
入力レベルの場合中間周波帯域幅を広くし、それ以外の
場合は中間周波帯域幅を狭くするように構成したことを
特徴とするＩＦ帯域可変ＡＭラジオ。 ２ 少なくとも上記第１のフィルタ回路および第２のフ
ィルタ回路の各々に入力された該当信号のいずれかが強
入力レベルの場合中間周波帯域幅を狭くするように構成
したことを特徴とする実用新案登録請求の範囲第１項記
載のＩＦ帯域可変ＡＭラジオ。[Claims for Utility Model Registration] 1. The intermediate frequency amplification stage includes a first filter circuit that can pass the lower limit frequency component of the interference signal adjacent to the received signal, and a second filter circuit that can pass the upper limit frequency component of the interference signal, and the received signal. A switch means is provided in the coupling circuit capable of passing the signal, and when the corresponding signals inputted to each of the first filter circuit, the second filter circuit, and the coupling circuit are at a weak input level, the intermediate frequency bandwidth is widened. However, in other cases, the IF band variable AM radio is configured to narrow the intermediate frequency bandwidth. 2. Registration of a utility model characterized in that the intermediate frequency bandwidth is narrowed when either of the corresponding signals input to each of the first filter circuit and the second filter circuit is at a strong input level. IF band variable AM radio according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13466682U JPS5939550U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13466682U JPS5939550U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5939550U true JPS5939550U (en) | 1984-03-13 |
Family
ID=30303368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13466682U Pending JPS5939550U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61177030A (en) * | 1985-01-31 | 1986-08-08 | Matsushita Electric Ind Co Ltd | Radio receiver |
-
1982
- 1982-09-03 JP JP13466682U patent/JPS5939550U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61177030A (en) * | 1985-01-31 | 1986-08-08 | Matsushita Electric Ind Co Ltd | Radio receiver |
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