JP4409423B2 - Am受信機 - Google Patents
Am受信機 Download PDFInfo
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- JP4409423B2 JP4409423B2 JP2004367315A JP2004367315A JP4409423B2 JP 4409423 B2 JP4409423 B2 JP 4409423B2 JP 2004367315 A JP2004367315 A JP 2004367315A JP 2004367315 A JP2004367315 A JP 2004367315A JP 4409423 B2 JP4409423 B2 JP 4409423B2
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- Japan
- Prior art keywords
- signal
- frequency
- intermediate frequency
- antenna
- receiver
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Description
4 アンテナ
6 同軸ケーブル
8 バッファ増幅器(バッファ増幅手段)
10 ミキサ(第1周波数変換手段)
12 16 第1中間周波バンドパスフィルタ(第1中間周波処理手段)
14 第1中間周波増幅器(第1中間周波処理手段)
18 ミキサ(第2周波数変換手段)
22 第2中間周波バンドパスフィルタ(第2中間周波処理手段)
24 第2中間周波増幅器(第2中間周波処理手段)
26 AM検波器(AM検波手段)
Claims (4)
- AM放送受信用アンテナに長さが不定で容量が変化する同軸ケーブルを介して接続されるアンテナ端子と、
このアンテナ端子に直接に接続されたバッファ増幅手段と、
前記AM放送受信用アンテナで受信された受信信号が前記バッファ増幅手段を介して供給されることによって前記アンテナ端子と間接的に接続され、前記受信信号を第1局部発振信号に基づいて、前記AM放送の周波数帯よりも高い周波数の第1中間周波信号に周波数変換し、第1中間周波信号に派生する不要信号の周波数が前記AM放送の周波数帯外となるように第1局部発振信号の周波数を選択している第1周波数変換手段と、
第1周波数変換手段の出力信号からの第1中間周波信号の抽出と増幅とを行う第1中間周波信号処理手段と、
第1中間周波信号処理手段の出力信号を入力し、第1中間周波信号を第2局部発振信号に基づいて、前記AM放送の周波数帯外で第1中間周波信号よりも低い周波数の第2中間周波信号に周波数変換する第2周波数変換手段と、
第2周波数変換手段の出力信号からの第2中間周波信号の抽出と増幅とを行う第2中間周波信号処理手段と、
第2中間周波信号処理手段の出力信号をAM検波する検波手段とを、
具備するAM受信機。 - 請求項1記載のAM受信機において、前記バッファ増幅手段は、自動利得制御信号に基づいてその利得が調整されるAM受信機。
- 請求項1または2記載のAM受信機において、前記アンテナ端子には、前記自動利得制御信号に基づいて、減衰量が可変される可変減衰手段が設けられているAM受信機。
- 請求項1、2または3記載のAM受信機において、第1周波数変換手段は、前記自動利得制御信号に基づいてその利得が調整されるAM受信機。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004367315A JP4409423B2 (ja) | 2004-12-20 | 2004-12-20 | Am受信機 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2004367315A JP4409423B2 (ja) | 2004-12-20 | 2004-12-20 | Am受信機 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006174326A JP2006174326A (ja) | 2006-06-29 |
JP4409423B2 true JP4409423B2 (ja) | 2010-02-03 |
Family
ID=36674559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2004367315A Active JP4409423B2 (ja) | 2004-12-20 | 2004-12-20 | Am受信機 |
Country Status (1)
Country | Link |
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JP (1) | JP4409423B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006045160A1 (de) * | 2006-09-25 | 2008-04-03 | Robert Bosch Gmbh | Funkempfänger |
CN102832959B (zh) * | 2012-08-22 | 2015-01-21 | 天津大学 | 高中频超外差+零中频结构的射频前端 |
CN115529056B (zh) * | 2022-06-28 | 2023-10-03 | 南京源兴智达信息科技有限公司 | 一种基于面向判决的非相干维特比解调算法的接收机 |
-
2004
- 2004-12-20 JP JP2004367315A patent/JP4409423B2/ja active Active
Also Published As
Publication number | Publication date |
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JP2006174326A (ja) | 2006-06-29 |
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