JPH0286226U - - Google Patents
Info
- Publication number
- JPH0286226U JPH0286226U JP16403488U JP16403488U JPH0286226U JP H0286226 U JPH0286226 U JP H0286226U JP 16403488 U JP16403488 U JP 16403488U JP 16403488 U JP16403488 U JP 16403488U JP H0286226 U JPH0286226 U JP H0286226U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- radio receiver
- intermediate frequency
- receiving antenna
- amplifies
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Noise Elimination (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
第１図はこの考案に係るラジオ受信機のフロン
トエンド回路の実施例を示したブロツク図である
。第２図は従来例を示したラジオ受信機のフロン
トエンド回路のブロツク図である。
主な符号の説明、１：受信アンテナ、２：トラ
ツプ回路、３：初段同調回路、４：高周波増幅回
路、５：段間同調回路、６：混合回路、７：局部
発振回路、８：中間周波同調回路、９：中間周波
増幅回路、１０：ＡＧＣ検波回路、１１：ローパ
スフイルタ、１２：減衰器。
FIG. 1 is a block diagram showing an embodiment of a front end circuit of a radio receiver according to this invention. FIG. 2 is a block diagram of a front end circuit of a conventional radio receiver. Explanation of main symbols: 1: Receiving antenna, 2: Trap circuit, 3: First stage tuning circuit, 4: High frequency amplifier circuit, 5: Interstage tuning circuit, 6: Mixing circuit, 7: Local oscillation circuit, 8: Intermediate frequency Tuning circuit, 9: intermediate frequency amplification circuit, 10: AGC detection circuit, 11: low pass filter, 12: attenuator.
Claims (1)
、混合回路で中間周波に変換して中間周波増幅を
行うラジオ受信機のフロントエンド回路において
、 受信アンテナで受信したＲＦ信号の中から希望
受信信号以外の信号を排除するトラツプ回路と、 このトラツプ回路の共振周波数をチユーニング
電圧で制御する制御手段とを備えたことを特徴と
するラジオ受信機のフロントエンド回路。[Claim for Utility Model Registration] RF signals received by the receiving antenna in a front-end circuit of a radio receiver that RF amplifies the RF signal received by the receiving antenna, converts it to an intermediate frequency in a mixing circuit, and amplifies the intermediate frequency. 1. A front-end circuit for a radio receiver, comprising: a trap circuit for eliminating signals other than a desired reception signal; and a control means for controlling the resonance frequency of the trap circuit using a tuning voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16403488U JPH0286226U (en) | 1988-12-20 | 1988-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16403488U JPH0286226U (en) | 1988-12-20 | 1988-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0286226U true JPH0286226U (en) | 1990-07-09 |
Family
ID=31449288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16403488U Pending JPH0286226U (en) | 1988-12-20 | 1988-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0286226U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006075465A1 (en) * | 2005-01-17 | 2006-07-20 | Matsushita Electric Industrial Co., Ltd. | Tuner, and mobile device using the same |
-
1988
- 1988-12-20 JP JP16403488U patent/JPH0286226U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006075465A1 (en) * | 2005-01-17 | 2006-07-20 | Matsushita Electric Industrial Co., Ltd. | Tuner, and mobile device using the same |
| JP2006197450A (en) * | 2005-01-17 | 2006-07-27 | Matsushita Electric Ind Co Ltd | Electronic tuner and portable device using the same |
| JP4639809B2 (en) * | 2005-01-17 | 2011-02-23 | パナソニック株式会社 | Electronic tuner and portable device using the same |
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