JPS62173835U - - Google Patents
Info
- Publication number
- JPS62173835U JPS62173835U JP6134886U JP6134886U JPS62173835U JP S62173835 U JPS62173835 U JP S62173835U JP 6134886 U JP6134886 U JP 6134886U JP 6134886 U JP6134886 U JP 6134886U JP S62173835 U JPS62173835 U JP S62173835U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- detection circuit
- detection
- electric field
- field strength
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 13
- 230000005684 electric field Effects 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims 3
- 238000003379 elimination reaction Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Noise Elimination (AREA)
Description
第１図は本考案の実施例であるラジオ受信機の
ブロツク図、第２図は第１図における切替回路及
び切替レベル制御回路の回路図、第３図は切替レ
ベル説明図、第４図は雑音除去回路と雑音除去回
路制御部のブロツク図、第５図は第４図における
各部波形図、第６図はアンテナ入力とＳ／Ｎ比の
特性図、第７図はアンテナ入力と歪率の特性図で
ある。
３……中間周波増幅器、１５……切替回路、１
６……切替レベル制御回路、１７……雑音除去回
路、１９……雑音除去回路制御部、２５……受信
電界強度を検出する検出回路、２６……パルスカ
ウント検波回路、２７……レシオ検波回路。
Fig. 1 is a block diagram of a radio receiver that is an embodiment of the present invention, Fig. 2 is a circuit diagram of the switching circuit and switching level control circuit in Fig. 1, Fig. 3 is a switching level explanatory diagram, and Fig. 4 is A block diagram of the noise removal circuit and the noise removal circuit control section, Fig. 5 is a waveform diagram of each part in Fig. 4, Fig. 6 is a characteristic diagram of antenna input and S/N ratio, and Fig. 7 is a diagram of antenna input and distortion factor. It is a characteristic diagram. 3...Intermediate frequency amplifier, 15...Switching circuit, 1
6...Switching level control circuit, 17...Noise removal circuit, 19...Noise removal circuit control section, 25...Detection circuit for detecting received electric field strength, 26...Pulse count detection circuit, 27...Ratio detection circuit .
Claims (1)
ルスカウント検波回路である第１の検波回路及び
パルスカウント検波回路以外の第２の検波回路と
、 受信電界強度を検出する検出回路と、 第１の検波回路からの検波信号と第２の検波回
路からの検波信号を受信電界強度に基づいて選択
的に出力する切替回路と、 切替回路から出力される検波信号に含まれるノ
イズを除去する雑音除去回路と、 受信電界強度に基づいて雑音除去回路の動作状
態を切り替える雑音除去回路制御部とを有するこ
とを特徴とするラジオ受信機。[Scope of Claim for Utility Model Registration] A first detection circuit which is a pulse count detection circuit provided after the intermediate frequency amplifier, a second detection circuit other than the pulse count detection circuit, and a detection circuit which detects received electric field strength. a switching circuit that selectively outputs the detection signal from the first detection circuit and the detection signal from the second detection circuit based on the received electric field strength; and noise contained in the detection signal output from the switching circuit. What is claimed is: 1. A radio receiver comprising: a noise elimination circuit that eliminates the noise; and a noise elimination circuit control section that switches the operating state of the noise elimination circuit based on received electric field strength.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6134886U JPH033003Y2 (en) | 1986-04-23 | 1986-04-23 | |
| US07/008,622 US4727580A (en) | 1986-04-23 | 1987-01-29 | Radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6134886U JPH033003Y2 (en) | 1986-04-23 | 1986-04-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62173835U true JPS62173835U (en) | 1987-11-05 |
| JPH033003Y2 JPH033003Y2 (en) | 1991-01-25 |
Family
ID=30894602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6134886U Expired JPH033003Y2 (en) | 1986-04-23 | 1986-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH033003Y2 (en) |
-
1986
- 1986-04-23 JP JP6134886U patent/JPH033003Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033003Y2 (en) | 1991-01-25 |
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