JPS5939549U - IF band variable AM radio - Google Patents
IF band variable AM radioInfo
- Publication number
- JPS5939549U JPS5939549U JP13466582U JP13466582U JPS5939549U JP S5939549 U JPS5939549 U JP S5939549U JP 13466582 U JP13466582 U JP 13466582U JP 13466582 U JP13466582 U JP 13466582U JP S5939549 U JPS5939549 U JP S5939549U
- Authority
- JP
- Japan
- Prior art keywords
- radio
- intermediate frequency
- band variable
- varying
- control means
- 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) [Summary] 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、第９図および第１０図はいずれも本考案実
施例を示す回路図、第８図および第１１図は共に本考案
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、８Ａ、８Ｂ・・・
セラミックフィルタ、９Ａ、 ９Ｂ、 ９Ｃ・・・
スイッチ、ＣＦｌ、 ＣＦ２・・・セラミックフィルタ
、Ｑ６．Ｑ６・・・トランジスタ、Ｒ□５〜Ｒ２３・・
・抵抗、Ｃ□〜Ｃ３・・・コンデンサ。1 to 3 and 6 are characteristic diagrams for explaining the present invention, FIGS. 4 and 5 are circuit diagrams showing conventional examples, and FIGS. 7, 9, and 10 are Both are circuit diagrams showing embodiments of the present invention, and both FIG. 8 and FIG. 11 are characteristic diagrams showing the results of the present invention. ' 2... Tuner section, 3.4... Intermediate frequency amplification stage, 7 -... AGC amplifier, 8A, 8B...
Ceramic filter, 9A, 9B, 9C...
Switch, CFl, CF2...Ceramic filter, Q6. Q6...Transistor, R□5~R23...
・Resistance, C□~C3...Capacitor.
Claims (1)
る機能を備えたＡＭラジオにおいて、上記中間周波帯域
幅を可変するための制御手段に電気的あるいは機械的に
連動して動作する第２の制御手段を設け、この第２の制
御手段により中間周波増幅段の利得を補正するように構
成したことを特徴とするＩＦ帯域可変ＡＭラジオ。In an AM radio equipped with a function of varying the intermediate frequency bandwidth according to the antenna input level, a second control that operates in electrical or mechanical conjunction with the control means for varying the intermediate frequency bandwidth. 1. A variable IF band AM radio, characterized in that the second control means corrects the gain of the intermediate frequency amplification stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13466582U JPS5939549U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13466582U JPS5939549U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5939549U true JPS5939549U (en) | 1984-03-13 |
Family
ID=30303366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13466582U Pending JPS5939549U (en) | 1982-09-03 | 1982-09-03 | IF band variable AM radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939549U (en) |
-
1982
- 1982-09-03 JP JP13466582U patent/JPS5939549U/en active Pending
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