JPS5859248U - Tuning detection circuit - Google Patents
Tuning detection circuitInfo
- Publication number
- JPS5859248U JPS5859248U JP15440581U JP15440581U JPS5859248U JP S5859248 U JPS5859248 U JP S5859248U JP 15440581 U JP15440581 U JP 15440581U JP 15440581 U JP15440581 U JP 15440581U JP S5859248 U JPS5859248 U JP S5859248U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- tuning
- phase shifter
- quadrature detection
- phase shifters
- 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
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Circuits Of Receivers In General (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
図はこの考案に係わる受信機の全体構成を示すブロック
図である。
１・・・・・・受信モード切替スイッチ、２・・・・・
・移相器切替スイッチ、３・・・・・・アップスイッチ
、４・・・・・・ダウンスイッチ、５・・・・・・制御
回路、′６・・・・・・シンセサイｆ選局ＰＬＬ、７−
−−−−−ＦＭフロントエンド、９・・・・・・クオド
ラチャＩＣ１１６・・・・・・ＦＭ検波回路、１７・・
・・・・クオドラチャ検波回路、２８・・・・・・ＦＭ
用移相回路、２９・・・・・・ＡＭ用移相回路、３０・
・・・・・ＦＭ用セラミック移相器、３１・・・・・・
ＡＭ用セラミック移相器、３４・・・・・・ステレオ復
調回路、３５・・−・・・・ＡＭフロントエンド、３７
・・・・・・ＡＭ検波回路。
、 ” ｌ
’Ｍｌｉｈ！ｆ１−．． ２６↓
ｎ
Ｌ＝で４」The figure is a block diagram showing the overall configuration of a receiver according to this invention. 1... Receive mode selector switch, 2...
・Phase shifter selection switch, 3... Up switch, 4... Down switch, 5... Control circuit, '6... Synthesizer f tuning PLL , 7-
-----FM front end, 9...Quadrature IC116...FM detection circuit, 17...
...Quadrature detection circuit, 28...FM
Phase shift circuit for use, 29... Phase shift circuit for AM, 30.
...Ceramic phase shifter for FM, 31...
AM ceramic phase shifter, 34...Stereo demodulation circuit, 35...AM front end, 37
...AM detection circuit. , ”l
'Mlih! f1-. ．． 26↓ n L = 4”
Claims (2)
、かつＦＭ検波回路としてクオドラチャ検波回路を使用
する受信機において； 前記受信機のＡＭ用中間周波増幅段の出力を前記クオド
ラチャ検波回路に導入するとともに； 前記クオドラチャ検波回路を構成する移相器として、Ａ
Ｍ／ＦＭの切替に応じてその中心周波゛ 数がＡＭ用、
ＦＭ用に切替設定される両用移相器を設け； ＡＭ放送受信時には、前記クオドラチャ検波回路から出
力されるＳ字カーブ信号により、同調状態を検出するよ
うに構成したことを特徴とする同調検出回路。 −(1) In a receiver that is configured to be able to switch and receive AM broadcasts and FM broadcasts and uses a quadrature detection circuit as an FM detection circuit; the output of the AM intermediate frequency amplification stage of the receiver is sent to the quadrature detection circuit. Introducing; As a phase shifter constituting the quadrature detection circuit,
Depending on the M/FM switching, the center frequency changes to AM,
A tuning detection circuit comprising: a dual-purpose phase shifter that is switched and set for FM; and configured to detect a tuning state by an S-curve signal output from the quadrature detection circuit when receiving AM broadcasting. . −
Ｍ用の別個の移相器と、ＡＭ、ＦＭ受信状態の切替に連
動して、前記各移相器を択一的に能動化子るための切替
スイッチとからなることを特徴とする実用新案登録請求
の範囲第１項に記載の同調検出回路。(2) The dual-purpose phase shifters are for AM and F phase shifters installed side by side with each other.
A utility model comprising a separate phase shifter for M and a changeover switch for selectively activating each of the phase shifters in conjunction with switching between AM and FM reception states. A tuning detection circuit according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440581U JPS5859248U (en) | 1981-10-17 | 1981-10-17 | Tuning detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440581U JPS5859248U (en) | 1981-10-17 | 1981-10-17 | Tuning detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5859248U true JPS5859248U (en) | 1983-04-21 |
Family
ID=29947004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15440581U Pending JPS5859248U (en) | 1981-10-17 | 1981-10-17 | Tuning detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5859248U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123228A (en) * | 1979-03-16 | 1980-09-22 | Hitachi Ltd | Detecting circuit |
-
1981
- 1981-10-17 JP JP15440581U patent/JPS5859248U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55123228A (en) * | 1979-03-16 | 1980-09-22 | Hitachi Ltd | Detecting circuit |
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