JPH0273837U - - Google Patents
Info
- Publication number
- JPH0273837U JPH0273837U JP15336288U JP15336288U JPH0273837U JP H0273837 U JPH0273837 U JP H0273837U JP 15336288 U JP15336288 U JP 15336288U JP 15336288 U JP15336288 U JP 15336288U JP H0273837 U JPH0273837 U JP H0273837U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- muting
- amplification
- drive signal
- noise 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.)
- Granted
Links
- 230000003321 amplification Effects 0.000 claims 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims 7
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図はこの考案の第１の実施例に係る車載用
のＦＭダイバーシテイー受信機の要部を示すブロ
ツク図、第２図は第１図中のミユーテイング制御
回路の具体的な構成を示すブロツク図、第３図は
この考案の第２の実施例に係る車載用のＦＭダイ
バーシテイー受信機の要部を示すブロツク図、第
４図は従来のＦＭダイバーシテイー受信機の要部
を示すブロツク図、第５図と第６図は第４図のＦ
Ｍダイバーシテイー受信機の動作を示す説明図で
ある。
主な符号の説明、１０：第１のアンテナ、１２
：第１の受信部、１４，２４，５２：プリアンプ
、２０：第２のアンテナ、２２：第２の受信部、
３８：選択部、４０：ミユーテイング制御部。
FIG. 1 is a block diagram showing the main parts of an on-vehicle FM diversity receiver according to the first embodiment of this invention, and FIG. 2 is a block diagram showing the specific configuration of the muting control circuit in FIG. 1. 3 is a block diagram showing the main parts of an in-vehicle FM diversity receiver according to the second embodiment of this invention, and FIG. 4 is a block diagram showing the main parts of a conventional FM diversity receiver. , Figures 5 and 6 are F in Figure 4.
FIG. 3 is an explanatory diagram showing the operation of the M diversity receiver. Explanation of main symbols, 10: first antenna, 12
: first receiving section, 14, 24, 52: preamplifier, 20: second antenna, 22: second receiving section,
38: selection section, 40: mutating control section.
Claims (1)
を含む複数系統の受信手段と、各系統の受信手段
の出力の増幅を系統別に行うとともに、ミユーテ
イング駆動信号に基づき増幅率を可変させる増幅
率可変増幅手段と、を有するＦＭダイバーシテイ
ー受信機において、 各系統の中で、受信信号中のノイズレベルに関
連する信号が一番大きなものを検出し、検出した
ノイズレベルに関連する信号に応じたミユーテイ
ング駆動信号を各系統の増幅率可変増幅手段に出
力するミユーテイング制御手段を備えたこと、 を特徴とするＦＭダイバーシテイー受信機。 (2) 少なくともアンテナからＦＭ検波手段まで
を含む複数系統の受信手段と、各系統の受信手段
の出力の中から受信状態の良好なものを選択して
出力する選択手段と、を有するＦＭダイバーシテ
イー受信機において、 選択手段より後段に設けられて、受信信号の増
幅を行うとともに、ミユーテイング駆動信号に従
い増幅率が可変する増幅率可変増幅手段と、 各系統の中で、受信信号中のノイズレベルに関
連する信号が一番大きなものを検出し、検出した
ノイズレベルに関連する信号に応じたミユーテイ
ング駆動信号を各系統の増幅率可変増幅手段に出
力するミユーテイング制御手段と、 を備えたことを特徴とするＦＭダイバーシテイ
ー受信機。[Claims for Utility Model Registration] (1) A plurality of receiving means including at least an antenna to an FM detection means, and the output of each receiving means is amplified for each system, and the amplification factor is adjusted based on the mutating drive signal. In an FM diversity receiver having variable amplification means for varying the amplification factor, the signal related to the noise level in the received signal is the largest in each system, and the signal related to the detected noise level is detected. An FM diversity receiver comprising a muting control means for outputting a muting drive signal according to the signal to the variable gain amplification means of each system. (2) FM diversity having multiple systems of receiving means including at least antennas to FM detection means, and selection means for selecting and outputting those with good reception conditions from among the outputs of the receiving means of each system. In the receiver, variable amplification means is provided after the selection means to amplify the received signal and the amplification factor is varied according to the muting drive signal; Muting control means for detecting the largest related signal and outputting a muting drive signal to the variable gain amplification means of each system in accordance with the signal related to the detected noise level. FM diversity receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988153362U JPH0513069Y2 (en) | 1988-11-25 | 1988-11-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988153362U JPH0513069Y2 (en) | 1988-11-25 | 1988-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0273837U true JPH0273837U (en) | 1990-06-06 |
| JPH0513069Y2 JPH0513069Y2 (en) | 1993-04-06 |
Family
ID=31429134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988153362U Expired - Lifetime JPH0513069Y2 (en) | 1988-11-25 | 1988-11-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0513069Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007037146A1 (en) * | 2005-09-28 | 2007-04-05 | Pioneer Corporation | Diversity reception device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57150241A (en) * | 1981-11-06 | 1982-09-17 | Nissan Motor Co Ltd | Diversity receiving device |
-
1988
- 1988-11-25 JP JP1988153362U patent/JPH0513069Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57150241A (en) * | 1981-11-06 | 1982-09-17 | Nissan Motor Co Ltd | Diversity receiving device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007037146A1 (en) * | 2005-09-28 | 2007-04-05 | Pioneer Corporation | Diversity reception device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0513069Y2 (en) | 1993-04-06 |
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