JPS5914435U - Radio receiver intermediate frequency bandwidth switching circuit - Google Patents
Radio receiver intermediate frequency bandwidth switching circuitInfo
- Publication number
- JPS5914435U JPS5914435U JP10837282U JP10837282U JPS5914435U JP S5914435 U JPS5914435 U JP S5914435U JP 10837282 U JP10837282 U JP 10837282U JP 10837282 U JP10837282 U JP 10837282U JP S5914435 U JPS5914435 U JP S5914435U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- radio receiver
- frequency bandwidth
- switching circuit
- bandwidth switching
- 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
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図は従来のラジオ受信機の中間周波帯域幅切換回路
を示す回路図、第２図は本考案に係るラジオ受信機の中
間周波帯域幅切換回路を示す回路図である。
３・・・受信入力信号レベル検出回路の出力端子、ＣＦ
・・・セラミックフィルタ、Ｃ３・・・コンデンサ、Ｄ
・・・スイッチングダイオード。FIG. 1 is a circuit diagram showing an intermediate frequency bandwidth switching circuit of a conventional radio receiver, and FIG. 2 is a circuit diagram showing an intermediate frequency bandwidth switching circuit of a radio receiver according to the present invention. 3...Output terminal of received input signal level detection circuit, CF
...Ceramic filter, C3...Capacitor, D
...Switching diode.
Claims (2)
発生する受信入力信号レベル検出回路を備えたラジオ受
信機に於いて、前記検出回路の出力によって制御され中
間周波選択素子の負荷を切換える半導体スイッチング素
子を設け、受信入力信号レベルの大きさに応じて中間周
波帯域幅を切換える様にしたことを特徴とするラジオ受
信機の中間周波帯域幅切換回路。(1) In a radio receiver equipped with a reception input signal level detection circuit that generates a DC signal according to the magnitude of the reception input signal level, the load of the intermediate frequency selection element is switched under the control of the output of the detection circuit. An intermediate frequency bandwidth switching circuit for a radio receiver, characterized in that a semiconductor switching element is provided and the intermediate frequency bandwidth is switched according to the level of a received input signal.
ることを特徴とする実用新案登録請求の範囲第１項記載
のラジオ受信機の中間周波帯域幅切換回路。(2) The intermediate frequency bandwidth switching circuit for a radio receiver according to claim 1, wherein the intermediate frequency selection element is a ceramic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10837282U JPS5914435U (en) | 1982-07-16 | 1982-07-16 | Radio receiver intermediate frequency bandwidth switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10837282U JPS5914435U (en) | 1982-07-16 | 1982-07-16 | Radio receiver intermediate frequency bandwidth switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5914435U true JPS5914435U (en) | 1984-01-28 |
Family
ID=30252859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10837282U Pending JPS5914435U (en) | 1982-07-16 | 1982-07-16 | Radio receiver intermediate frequency bandwidth switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5914435U (en) |
-
1982
- 1982-07-16 JP JP10837282U patent/JPS5914435U/en active Pending
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