JPH01149137U - - Google Patents
Info
- Publication number
- JPH01149137U JPH01149137U JP4555288U JP4555288U JPH01149137U JP H01149137 U JPH01149137 U JP H01149137U JP 4555288 U JP4555288 U JP 4555288U JP 4555288 U JP4555288 U JP 4555288U JP H01149137 U JPH01149137 U JP H01149137U
- Authority
- JP
- Japan
- Prior art keywords
- noise
- agc
- circuit
- predetermined level
- antenna input
- 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
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Noise Elimination (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案にかかるＡＭラジオ受信機のブ
ロツク図、第２図は２種類の信号、ノイズ特性図
である。
１２……中間周波増幅段、１３……ＡＧＣ回路
、１７……ノイズ検出器、２０……レベル比較器
、２１……ＡＧＣ切替回路。
FIG. 1 is a block diagram of an AM radio receiver according to the present invention, and FIG. 2 is a diagram of two types of signals and noise characteristics. 12...Intermediate frequency amplification stage, 13...AGC circuit, 17...Noise detector, 20...Level comparator, 21...AGC switching circuit.
Claims (1)
回路と、 中間周波増幅段よりノイズ成分を検出するノイ
ズ検出器と、 ノイズ検出器により検出されたノイズが所定レ
ベル以上か比較する比較器と、 ノイズが所定レベル以下の時、ＡＧＣ回路をし
て低アンテナ入力レベルにおける信号及びノイズ
特性をＯｄＢ側に持ち上げさせるＡＧＣ切替回路
を有することを特徴とするＡＭラジオ受信機。[Claims for utility model registration] AGC that controls gain according to antenna input
circuit, a noise detector that detects noise components from the intermediate frequency amplification stage, a comparator that compares whether the noise detected by the noise detector is above a predetermined level, and an AGC circuit that detects noise when the noise is below a predetermined level. An AM radio receiver characterized by having an AGC switching circuit that raises signal and noise characteristics to the OdB side at a low antenna input level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988045552U JP2500288Y2 (en) | 1988-04-04 | 1988-04-04 | AM radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988045552U JP2500288Y2 (en) | 1988-04-04 | 1988-04-04 | AM radio receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01149137U true JPH01149137U (en) | 1989-10-16 |
| JP2500288Y2 JP2500288Y2 (en) | 1996-06-05 |
Family
ID=31271857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988045552U Expired - Lifetime JP2500288Y2 (en) | 1988-04-04 | 1988-04-04 | AM radio receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2500288Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06125519A (en) * | 1992-04-28 | 1994-05-06 | Internatl Business Mach Corp <Ibm> | Wear-resistant and scratch-resistant conductive polymer composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58173911A (en) * | 1982-04-06 | 1983-10-12 | Nissan Motor Co Ltd | Radio receiver for vehicle |
| JPS6167324A (en) * | 1984-09-10 | 1986-04-07 | Sony Corp | Sound signal receiver |
-
1988
- 1988-04-04 JP JP1988045552U patent/JP2500288Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58173911A (en) * | 1982-04-06 | 1983-10-12 | Nissan Motor Co Ltd | Radio receiver for vehicle |
| JPS6167324A (en) * | 1984-09-10 | 1986-04-07 | Sony Corp | Sound signal receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2500288Y2 (en) | 1996-06-05 |
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