JPS5978748U - DX-Local switching circuit of FM/AM receiver - Google Patents
DX-Local switching circuit of FM/AM receiverInfo
- Publication number
- JPS5978748U JPS5978748U JP17518282U JP17518282U JPS5978748U JP S5978748 U JPS5978748 U JP S5978748U JP 17518282 U JP17518282 U JP 17518282U JP 17518282 U JP17518282 U JP 17518282U JP S5978748 U JPS5978748 U JP S5978748U
- Authority
- JP
- Japan
- Prior art keywords
- local
- receiver
- antenna
- tuning circuit
- receiving
- 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
- 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受信機ノＤＸ −Ｌｏｃａｌ
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二Ｌｏｃａｌ切換回路を示す図、第３図は
第２図に於けるＡＭ用アンテナ同調回路の同調特性を示
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、Ｓｌ・・・Ｄ
Ｘ−Ｌｏｃａｌ切換スイッチ、Ｃ□・・・ＦＭ入力容量
。Figure 1 shows the conventional FM-AM receiver DX-Local.
FIG. 2 is a diagram showing a switching circuit, FIG. 2 is a diagram showing a DX-2 local switching circuit of an FM-AM receiver according to the present invention, and FIG. 3 is a diagram showing the tuning characteristics of the AM antenna tuning circuit in FIG. It is a diagram. 1... Antenna connection terminal, 3... FM front end section, 5... AM antenna tuning circuit, Sl...D
X-Local selector switch, C□...FM input capacity.
Claims (1)
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ＤＸＸ受信時閉型ると
ともにＬｏｃａｌ受信時開放するＤＸ−Ｌｏｃａ１９Ｊ
換スイッチとを備え、該スイッチにてＦＭ−ＡＭの両バ
ンドでＤＸ−Ｌｏｃａｌの切換えを行なう様にしたＦＡ
、ＡＭ受信機のＤＸ −Ｌｏｃａｌ切換回路であって、
ＡＭバンドのＤＸ受信時前記ＡＭ！Ａ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
入力容量とで所望のＡＭ受信波数に同調する様に構成す
るとともに、ＡＭバンドのＬｏｃａｌ受信時前記スイッ
チにて前記ＡＭ用アンテナ同調回路と前記入力容量とを
遮断し、前記ＡＭ用アンテナ同調回路での同調周波数が
所望のＡＭ受信周波数からずれる様に構成したことを特
徴とするＦＭ−ＡＭ受信機のＤＸ−Ｌｏｃａｌ切換回路
。AM antenna tuning circuit connected to the antenna and FM
DX-Loca19J, which closes the connection between the input capacitor provided on the input side of the front end section, the antenna, and the input capacitor when receiving DXX, and opens when receiving Local;
FA that is equipped with a switching switch, and that switches DX-Local in both FM-AM bands.
, a DX-Local switching circuit of an AM receiver,
When receiving AM band DX, the AM! The A antenna tuning circuit and the input capacitance connected to the tuning circuit via the switch are configured to tune to a desired AM reception wave number, and when local reception of the AM band is performed, the AM DX-Local switching of an FM-AM receiver, characterized in that the AM antenna tuning circuit is cut off from the input capacitance, and the tuning frequency in the AM antenna tuning circuit is shifted from a desired AM receiving frequency. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17518282U JPS5978748U (en) | 1982-11-18 | 1982-11-18 | DX-Local switching circuit of FM/AM receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17518282U JPS5978748U (en) | 1982-11-18 | 1982-11-18 | DX-Local switching circuit of FM/AM receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978748U true JPS5978748U (en) | 1984-05-28 |
| JPS635301Y2 JPS635301Y2 (en) | 1988-02-13 |
Family
ID=30381189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17518282U Granted JPS5978748U (en) | 1982-11-18 | 1982-11-18 | DX-Local switching circuit of FM/AM receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978748U (en) |
-
1982
- 1982-11-18 JP JP17518282U patent/JPS5978748U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS635301Y2 (en) | 1988-02-13 |
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