JPS6090942U - Automatic band switching circuit - Google Patents
Automatic band switching circuitInfo
- Publication number
- JPS6090942U JPS6090942U JP18318883U JP18318883U JPS6090942U JP S6090942 U JPS6090942 U JP S6090942U JP 18318883 U JP18318883 U JP 18318883U JP 18318883 U JP18318883 U JP 18318883U JP S6090942 U JPS6090942 U JP S6090942U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- band switching
- automatic band
- switching circuit
- signal
- 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
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- 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図は本考案の一実施例を示すブロック図、第２図は
Ａ、 Ｂ点からの検出信号により制御信号を得るまで一
具体例を示す回路図である。
１・・・・・・ＲＦ部、１ａ、１ｂ・・・・・・帯域フ
ィ、ルタ、・ ｌｃ・・・・・・高周波増幅回路、１ｄ
・・・・・・検波器、１ｅ・・・・・・周波数混合器、
２・・・・・・アンテナ、３・・曲屈部発振器、４・・
・・・・中間周波フィルタ、５・・曲増幅回路、６・・
・・・・レベル設定回路、７・・・・・・検波回路、８
山・・・差動アンプ、９・・間コンパレータ。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a specific example until a control signal is obtained from detection signals from points A and B. 1...RF section, 1a, 1b...Band filter, router, lc...High frequency amplification circuit, 1d
......Detector, 1e...Frequency mixer,
2... Antenna, 3... Bent part oscillator, 4...
・・・Intermediate frequency filter, 5...Song amplification circuit, 6...
...Level setting circuit, 7...Detection circuit, 8
Mountain: Differential amplifier, 9: Comparator.
Claims (1)
中間周波数に変換し増幅回路にもたらすヘテロダイン方
式において、上記中間周波数を中パ 間層波フ
ィルタを介して増幅回路にもたらすように構成し、上記
フィルタの入力部および出力部の信号を取出して検波す
る検波回路および両検波回゛路の出力レベルを比較して
差信号を出力する差動増幅回路を具備してなり、上記差
信号で帯域幅の異なる特性に選択切換えするようにＲＦ
信号部分に切換制御信号を与えるように構成したことを
特徴とする帯域自動切換回路。In the heterodyne method, an RF signal input from an antenna circuit is converted into an intermediate frequency by a local oscillator circuit and brought to the amplifier circuit. It is equipped with a detection circuit that extracts and detects the signals at the input section and output section of the circuit, and a differential amplifier circuit that compares the output levels of both detection circuits and outputs a difference signal. RF to select and switch to different characteristics
An automatic band switching circuit characterized in that it is configured to apply a switching control signal to a signal portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18318883U JPS6090942U (en) | 1983-11-28 | 1983-11-28 | Automatic band switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18318883U JPS6090942U (en) | 1983-11-28 | 1983-11-28 | Automatic band switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6090942U true JPS6090942U (en) | 1985-06-21 |
Family
ID=30396527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18318883U Pending JPS6090942U (en) | 1983-11-28 | 1983-11-28 | Automatic band switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6090942U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007324716A (en) * | 2006-05-30 | 2007-12-13 | Kyocera Corp | Wireless receiving method and wireless receiving apparatus |
-
1983
- 1983-11-28 JP JP18318883U patent/JPS6090942U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007324716A (en) * | 2006-05-30 | 2007-12-13 | Kyocera Corp | Wireless receiving method and wireless receiving apparatus |
| JP4675277B2 (en) * | 2006-05-30 | 2011-04-20 | 京セラ株式会社 | Radio receiving method and radio receiving apparatus |
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