JPS5935917Y2 - Signal transmission path separation improvement circuit - Google Patents
Signal transmission path separation improvement circuitInfo
- Publication number
- JPS5935917Y2 JPS5935917Y2 JP15621276U JP15621276U JPS5935917Y2 JP S5935917 Y2 JPS5935917 Y2 JP S5935917Y2 JP 15621276 U JP15621276 U JP 15621276U JP 15621276 U JP15621276 U JP 15621276U JP S5935917 Y2 JPS5935917 Y2 JP S5935917Y2
- Authority
- JP
- Japan
- Prior art keywords
- transmission path
- tape
- signal
- radio
- section
- 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.)
- Expired
Links
Landscapes
- Stereo-Broadcasting Methods (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
【考案の詳細な説明】
本考案は、モノラルラジオ信号の受信部と、ステレオテ
ープ信号の再生部とを備える装置の信号伝送路のセパレ
ーション改善回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit for improving separation of a signal transmission path of an apparatus including a monaural radio signal receiving section and a stereo tape signal reproducing section.
第１図は従来のこの種装置の為の信号伝送路を示すもの
であり、ラジオ受信側Ｒとテープ再生側Ｔに切換えられ
るスイッチＳ１により、チューナー等のラジオ信号受信
部１若しくはテープ信号の再生部２とを選択的に駆動状
態にする一方、このスイッチＳ１に連動する切換えスイ
ッチＳ２．Ｓ３により、信号伝送路も切換えていた。FIG. 1 shows a signal transmission path for a conventional device of this kind. A switch S1 is used to switch between the radio receiving side R and the tape playing side T, and the radio signal receiving section 1 such as a tuner or the tape signal reproducing section 2 are selectively driven, while the changeover switches S2 . The signal transmission path was also switched by S3.
従って、第１図たり明らかな如くラジオ受信時に於いて
、モノラルのラジオ信号は、右信号の伝送路及び左信号
の伝送路に夫々伝送されるが、テープ再生時に於いては
、テープの右信号伝送路及びテープの左信号伝送路は互
に独立となり、相手方伝送路にクロストーク信号が混入
することはなく、セパレーションの良い再生ステレオ信
号が得られる。Therefore, as is clear from Figure 1, during radio reception, the monaural radio signal is transmitted to the right signal transmission path and the left signal transmission path, but during tape playback, the right signal of the tape The transmission path and the left signal transmission path of the tape are independent of each other, so that crosstalk signals are not mixed into the transmission path of the other party, and reproduced stereo signals with good separation can be obtained.
しかしながら、斯る従来回路では信号切換のために２個
の切換スイッチＳ２．Ｓ３を要するという欠点がある。However, in such a conventional circuit, two changeover switches S2. It has the disadvantage of requiring S3.
斯る欠点を解決するため、本願出願人は先に実願昭５０
−１７５７６９号（昭和５０年１２月２４日出願）に記
載の如き回路を提案した。In order to solve such drawbacks, the applicant first filed a U.S. Patent Application in 1973.
He proposed a circuit as described in No. 175769 (filed on December 24, 1975).
本考案は前記の先願の回路を更（こ簡略化できる回路を
提供せんとするものである。The present invention aims to provide a circuit that can further simplify the circuit of the prior application.
即ち、本考案は、前記切換えスイッチを１個になし、且
つテープ再生時に於いてクロストークのないステレオ信
号を再生せんとするものであり、そのために、テープ再
生時には通常使用しない所のラジオ信号受信部の前置増
幅器をテープ再生時に動作状態にしてクロストークを防
止せんとするものである。That is, the present invention eliminates the aforementioned changeover switch and reproduces a stereo signal without crosstalk during tape playback. To this end, it is possible to use radio signal reception in areas that are not normally used during tape playback. The purpose is to prevent crosstalk by activating the preamplifier in the section during tape playback.
次に第２図と共に本考案（こついて説明する。Next, the present invention will be explained with reference to FIG.
３はＦＭ／ＡＭチューナ等のラジオ信号受信部の受信回
路、４はラジオ信号受信部の前置増幅用トランジスタ、
５は、右再生信号用の磁気ヘッド６ｒ、再生増幅器７ｒ
ｓ音量調整抵抗８ｒ、主増幅器９ｒより構成される第１
伝送路、１０は左再生信用の磁気ヘッド６１、再生増幅
器７１、音量調整抵抗８１、主増幅器９１より構成され
る第２伝送路、１１はラジオ信号を第１及び第２伝送路
５，１０へ導く第３伝送路、Ｓｌは、ラジオ受信側Ｒ若
しくはテープ再生側Ｔに切換えられる切換えスイッチで
ある。3 is a receiving circuit of a radio signal receiving section such as an FM/AM tuner; 4 is a preamplification transistor of the radio signal receiving section;
5 is a magnetic head 6r for the right reproduction signal, and a reproduction amplifier 7r.
s A first circuit consisting of a volume adjustment resistor 8r and a main amplifier 9r.
A transmission line 10 is a second transmission line consisting of a magnetic head 61 for left reproduction, a regenerative amplifier 71, a volume adjustment resistor 81, and a main amplifier 91; 11 is a radio signal to the first and second transmission lines 5 and 10; The third transmission line, Sl, is a changeover switch that can be switched to the radio reception side R or the tape playback side T.
而して、切換えスイッチＳ１がＲｆＪＩＪにあるとき、
ラジオ信号受信部１が駆動状態となり、この回路１の出
力即ちラジオ信号は第３伝送路１１を介して、夫々第１
伝送路５及び第２伝送路１０に供給され、モノラルのラ
ジオ受信状態となる。Therefore, when the selector switch S1 is in RfJIJ,
The radio signal receiving section 1 is in a driving state, and the output of this circuit 1, that is, the radio signal is transmitted to the first and second channels via the third transmission path 11.
The signal is supplied to the transmission path 5 and the second transmission path 10, resulting in a monaural radio reception state.
一方、切換えスイッチＳ１をＴ側に転接すると、チュー
ナ回路３およびトランジスタ４のコレクタｌこは駆動電
源が供給されず、それらの回路は通常停止状態となるが
、本考案の回路においては、トランジスタ４のベースに
抵抗１２を介して順方向バイアスが印加されるので、ト
ランジスタ４の出力インピーダンスが低下する。On the other hand, when the changeover switch S1 is switched to the T side, drive power is not supplied to the collectors of the tuner circuit 3 and the transistor 4, and these circuits are normally stopped, but in the circuit of the present invention, the transistor Since a forward bias is applied to the base of transistor 4 via resistor 12, the output impedance of transistor 4 is reduced.
そのため、第３伝送路１１はトランジスタ４（こより略
接地されたようになり、テープのステレオ再生信号は、
夫々の伝送路に導かれるのみであり、第１及び第２伝送
路ｊ、上世間に於いて、第３伝送路１１を介してクロス
トークが生じることはない。Therefore, the third transmission line 11 is more or less grounded than the transistor 4, and the tape stereo playback signal is
They are only guided to their respective transmission paths, and crosstalk does not occur via the third transmission path 11 in the first and second transmission paths j or in the world.
尚、トランジスタ４のコレクタ側は負荷抵抗１３を介し
て、通常、切換スイッチＳ１のラジオ側端子Ｒへ接続さ
れるが、図面上破線で示す如く切換スイッチＳの共通端
子Ｃに接続しておいてもよい。Note that the collector side of the transistor 4 is normally connected to the radio side terminal R of the changeover switch S1 via the load resistor 13, but it is connected to the common terminal C of the changeover switch S as shown by the broken line in the drawing. Good too.
このように、本考案に依れば、ラジオ受信とテープ再生
の切換えスイッチを１個となし、従来ステレオの各信号
伝送路に挿入されていた前記切換えスイッチと連動する
信号切換えスイッチを廃止しても、クロストークのない
ステレオテープ再生ができる。As described above, according to the present invention, there is only one changeover switch for radio reception and tape playback, and the signal changeover switch that is linked to the changeover switch that was conventionally inserted into each signal transmission path of stereo is eliminated. It also allows stereo tape playback without crosstalk.
更に、本考案においてはテープ再生時には、通常、使用
しない前置増幅器を使用してクロストークを防止するよ
うに回路を構成しているので、使用回路素子数を低減す
ることができる。Furthermore, in the present invention, the circuit is configured to prevent crosstalk by using a preamplifier that is not normally used during tape playback, so the number of circuit elements used can be reduced.
図面は何れもモノラルラジオ信号の受信と、ステレオテ
ープ信号の再生を為す装置の為の信号伝送路を示すもの
であり、第１図は従来例、第２図はセパレーションを改
善した本考案の実施例を示す回路である。
主な図番の説明、１はラジオ信号受信部、２はテープ信
号の再生音瓜 ４は前置増幅器、」ｌま第１伝送路、１
０は第２伝送路、１１は第３伝送路、Ｓｌは切換えスイ
ッチ。The drawings all show signal transmission paths for a device that receives monaural radio signals and reproduces stereo tape signals. Figure 1 shows the conventional example, and Figure 2 shows the implementation of the present invention with improved separation. This is an example circuit. Explanation of the main drawing numbers: 1 is the radio signal receiving unit, 2 is the tape signal reproduction unit, 4 is the preamplifier, 1 is the first transmission line, 1
0 is the second transmission line, 11 is the third transmission line, and Sl is the changeover switch.
Claims (1)
再生部とを有する装置であって、磁気テープの右再生信
号を伝送する第１伝送路と、磁気テープの左再生信号を
伝送する第２伝送路と、ラジオ信号受信部の前置増幅器
の出力を前記第１および第２伝送路に導く第３伝送路と
、ラジオ受信側に切換えられたとき前記ラジオ信号受信
部を駆動状態となし、テープ再生側に切換えられたとき
前記ステレオテープ信号の再生部を導通状態になす切換
スイッチとを備え、前記前置増幅器の制御電極を前記切
換スイッチのテープ再生側に接続し、 而して、ラジオ受信時に於いては、ラジオ信号を前記第
３伝送路を介して第１伝送路及び第２伝送路へ伝送し、
テープ再生時に於いては、前記前置増幅器を動作状態に
し、前記第３伝送路を介して前記第１と第２伝送路間に
生じるクロストーク信号を抑制することを特徴とする信
号伝送路のセパレーション改善回路。[Claims for Utility Model Registration] An apparatus having a monaural radio signal receiving section and a stereo tape signal reproducing section, the first transmission line transmitting a right reproduction signal of a magnetic tape, and a left reproduction section of a magnetic tape. a second transmission path for transmitting signals; a third transmission path for guiding the output of the preamplifier of the radio signal receiving section to the first and second transmission paths; and when switched to the radio receiving side, the radio signal receiving section and a changeover switch that turns on the stereo tape signal playback section when switched to the tape playback side, and connects the control electrode of the preamplifier to the tape playback side of the changeover switch. , During radio reception, the radio signal is transmitted to the first transmission path and the second transmission path via the third transmission path,
The signal transmission path is characterized in that during tape playback, the preamplifier is activated to suppress crosstalk signals generated between the first and second transmission paths via the third transmission path. Separation improvement circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15621276U JPS5935917Y2 (en) | 1976-11-18 | 1976-11-18 | Signal transmission path separation improvement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15621276U JPS5935917Y2 (en) | 1976-11-18 | 1976-11-18 | Signal transmission path separation improvement circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5372407U JPS5372407U (en) | 1978-06-17 |
| JPS5935917Y2 true JPS5935917Y2 (en) | 1984-10-03 |
Family
ID=28764302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15621276U Expired JPS5935917Y2 (en) | 1976-11-18 | 1976-11-18 | Signal transmission path separation improvement circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5935917Y2 (en) |
-
1976
- 1976-11-18 JP JP15621276U patent/JPS5935917Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5372407U (en) | 1978-06-17 |
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