JPS5994455U - DX-Local switching circuit of FM/AM receiver - Google Patents
DX-Local switching circuit of FM/AM receiverInfo
- Publication number
- JPS5994455U JPS5994455U JP19050482U JP19050482U JPS5994455U JP S5994455 U JPS5994455 U JP S5994455U JP 19050482 U JP19050482 U JP 19050482U JP 19050482 U JP19050482 U JP 19050482U JP S5994455 U JPS5994455 U JP S5994455U
- Authority
- JP
- Japan
- Prior art keywords
- local
- receiver
- circuit
- antenna
- switching circuit
- 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
Landscapes
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＦＭ−ＡＭ受信機＜７）Ｄ各−Ｌｏｃａ
ｌ切換回路を示す図、第２図は本考案に係るＦＭ、ＡＭ
受信機のＤＸ −Ｌｏｃａｌ切換回路の一実施例を示す
図、第３図は本考案の他の実施例を示す図である。
１・・・アンテナ接続端子、３・・・ＦＭフロントエン
ド部、５・・・ＡＭ用アンテナ同調回路、６．６′・・
・補償回路、ｃｏ、 ’ｃ工・・・入力容量、Ｓｌ・・
・ＤＸ−Ｌｏｃａｌ切換スイッチ。Figure 1 shows a conventional FM-AM receiver <7)D each-Loca
Figure 2 shows the switching circuit for FM and AM according to the present invention.
FIG. 3 is a diagram showing one embodiment of the DX-Local switching circuit of the receiver, and FIG. 3 is a diagram showing another embodiment of the present invention. 1... Antenna connection terminal, 3... FM front end section, 5... AM antenna tuning circuit, 6.6'...
・Compensation circuit, CO, 'C...Input capacitance, SL...
・DX-Local changeover switch.
Claims (1)
路と、ＦＭフロントエンド部の入力側に設けられた入力
容量と、前記アンテナ及び前記入力容゛量間をＤＸ受信
時閉接するとともにＬｏｃａｌ受信時開放するＤＸ−Ｌ
ｏｃａｌ切換スイッチとを備え、該ス’（”７チにてＦ
Ｍ−ＡＭ（７）両／＜７ドテＤＸ −Ｌｏｃａｌの切換
えを行なう様にしたＦＭ、ＡＭ受信機のＤＸ −Ｌｏｃ
ａｌ切換回路であって、ＡＭパントノＤＸ受信時前記Ａ
Ｍ用アンテナ同調回路と該同調回路に前記スイッチを介
して接続される前記入力容量とて所望のＡＭ受信周波数
に同調する様に構成し、ＡＭバンドのＬｏｃａｌ受信時
前記スイッチを介して前記ＡＭ用アンテナ同調回路に接
続され且つ前記ＡＭ用アンテナ同調回路でトラッキング
エラーを生じさせずにＱのみ低下させる補償回路を設け
たことを特徴とするＦＭ−ＡＭ受信機のＤＸ−Ｌｏｃａ
ｌ切換回路。 （２１ＤＸ−Ｌｏｃａｌ切換スイッチは、共通端子にア
ンテナが接続され、ＤＸ側固定端子に入力容量が接続さ
れ、Ｌｏｃａｌ側固定端子には一端がアースに接続され
た補償回路の他端が接続されていることを特徴とするＦ
Ｍ−ＡＭ受信機（７）ＤＸ −Ｌｏｃａｌ切換回路。 （３） 補償回路は、直列接続された抵抗とコンデン
サとで構成されていることを特徴とする実用新案登録請
求の範囲第１項又は第２項記載のＦＭ−ＡＭ受信機（７
）ＤＸ−Ｌｏｃａｌ切換回路。 （４） 補償回路は、並列接続された抵抗とコンデン
サとで構成されていることを特徴とする実用新案登録請
求あ範囲第１項又は第２項記載のＦＭ−ＡＭ受信機（７
）ＤＸ−Ｌｏｃａｌ切換回路。[Claims for Utility Model Registration] (1) An AM antenna tuning circuit connected to an antenna, an input capacitor provided on the input side of the FM front end section, and DX reception between the antenna and the input capacitor. DX-L that closes when connected and opens when receiving Local
ocal changeover switch, and the F
DX-Loc of FM and AM receivers with M-AM (7) both/<7 dote DX-Local switching
al switching circuit, when receiving AM pantono DX, the above-mentioned A
The antenna tuning circuit for M and the input capacitor connected to the tuning circuit via the switch are configured to tune to a desired AM reception frequency, and when local reception of the AM band is received, the input capacitor is connected to the tuning circuit via the switch. DX-Loca of an FM-AM receiver, characterized in that a compensation circuit is connected to the antenna tuning circuit and reduces only the Q without causing a tracking error in the AM antenna tuning circuit.
l switching circuit. (In the 21DX-Local changeover switch, the antenna is connected to the common terminal, the input capacitor is connected to the DX side fixed terminal, and the other end of the compensation circuit whose one end is connected to ground is connected to the Local side fixed terminal. F characterized by
M-AM receiver (7) DX-Local switching circuit. (3) The FM-AM receiver (7
)DX-Local switching circuit. (4) The FM-AM receiver (7
)DX-Local switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050482U JPS5994455U (en) | 1982-12-15 | 1982-12-15 | DX-Local switching circuit of FM/AM receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19050482U JPS5994455U (en) | 1982-12-15 | 1982-12-15 | DX-Local switching circuit of FM/AM receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5994455U true JPS5994455U (en) | 1984-06-27 |
| JPS635302Y2 JPS635302Y2 (en) | 1988-02-13 |
Family
ID=30410456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19050482U Granted JPS5994455U (en) | 1982-12-15 | 1982-12-15 | DX-Local switching circuit of FM/AM receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5994455U (en) |
-
1982
- 1982-12-15 JP JP19050482U patent/JPS5994455U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS635302Y2 (en) | 1988-02-13 |
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