JPH01167732U - - Google Patents
Info
- Publication number
- JPH01167732U JPH01167732U JP6484188U JP6484188U JPH01167732U JP H01167732 U JPH01167732 U JP H01167732U JP 6484188 U JP6484188 U JP 6484188U JP 6484188 U JP6484188 U JP 6484188U JP H01167732 U JPH01167732 U JP H01167732U
- Authority
- JP
- Japan
- Prior art keywords
- filter
- amplification
- detection circuit
- switch means
- predetermined level
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案に係るラジオ受信機の一実施例
を示す回路図である。
１……フロントエンド、２……狭帯域フイルタ
、３……広帯域フイルタ、４……ＩＦ増幅検波回
路、９……シユミツトトリガ回路。
FIG. 1 is a circuit diagram showing an embodiment of a radio receiver according to the present invention. 1... Front end, 2... Narrowband filter, 3... Wideband filter, 4... IF amplification and detection circuit, 9... Schmitt trigger circuit.
Claims (1)
いに並列に狭帯域フイルタ及び広帯域フイルタを
設けると共に、 上記ＩＦ増幅検波回路の出力端と上記両フイル
タとの間に上記ＩＦ増幅検波回路からの検波信号
レベルに応じて上記両フイルタの何れを動作状態
とするスイツチ手段を設け、 上記スイツチ手段は上記検波信号が所定レベル
に達した事に基づいて上記広帯域フイルタを動作
させ、上記検波信号が所定レベル以下になつた事
に基づいて上記狭帯域フイルタを動作させるもの
であることを特徴とするラジオ受信機。[Claims for Utility Model Registration] A narrowband filter and a wideband filter are provided in parallel between the front end and the IF amplification/detection circuit, and the IF filter is provided between the output end of the IF amplification/detection circuit and both filters. A switch means is provided for activating either of the filters according to the level of the detection signal from the amplification/detection circuit, and the switch means operates the broadband filter based on the detection signal reaching a predetermined level. The radio receiver is characterized in that the narrow band filter is operated based on the fact that the detected signal falls below a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6484188U JPH01167732U (en) | 1988-05-17 | 1988-05-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6484188U JPH01167732U (en) | 1988-05-17 | 1988-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01167732U true JPH01167732U (en) | 1989-11-27 |
Family
ID=31290298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6484188U Pending JPH01167732U (en) | 1988-05-17 | 1988-05-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01167732U (en) |
-
1988
- 1988-05-17 JP JP6484188U patent/JPH01167732U/ja active Pending