JPS6149723B2 - - Google Patents
Info
- Publication number
- JPS6149723B2 JPS6149723B2 JP4157084A JP4157084A JPS6149723B2 JP S6149723 B2 JPS6149723 B2 JP S6149723B2 JP 4157084 A JP4157084 A JP 4157084A JP 4157084 A JP4157084 A JP 4157084A JP S6149723 B2 JPS6149723 B2 JP S6149723B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- microphone
- switch
- playback
- built
- 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
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、内蔵マイクロホンと、録音時に不要
な信号が出力されるのを遮断するモニタースイツ
チとを備えたテープレコーダに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape recorder equipped with a built-in microphone and a monitor switch that blocks unnecessary signals from being output during recording.
従来例の構成とその問題点
第１図は従来のテープレコーダを示すものであ
り、１は録音再生兼用の磁気ヘツド、２は録音再
生アンプ、３は音量ボリユーム、４はパワーアン
プ、５はスピーカ、６は内蔵マイクロホン、７は
電源端子、８，９は抵抗およびコンデンサ、１０
は抵抗、１１−１〜１１−５は互いに連動して切
換わる録音再生切換スイツチである。Conventional configuration and its problems Figure 1 shows a conventional tape recorder. 1 is a magnetic head for both recording and playback, 2 is a recording and playback amplifier, 3 is a volume control, 4 is a power amplifier, and 5 is a speaker. , 6 is a built-in microphone, 7 is a power supply terminal, 8 and 9 are resistors and capacitors, 10
1 is a resistor, and 11-1 to 11-5 are recording/playback switching switches that are switched in conjunction with each other.
上記構成において、再生時にはすべてのスイツ
チが第１図に示す側に切換えられる。このため、
磁気ヘツド１の再生信号はスイツチ１１−３、録
音再生アンプ２、スイツチ１１−４、音量ボリユ
ーム３、パワーアンプ４を介してスピーカ５から
放音される。一方、録音時にはすべてのスイツチ
が第１図と逆の側に切換えられる。このため、内
蔵マイクロホン６には抵抗１０およびスイツチ１
１−１を介して電源が供給される。そして、マイ
クロホン６に入力された信号はスイツチ１１−
３、録音再生アンプ２、スイツチ１１−４、抵抗
８およびコンデンサ９を介して磁気ヘツド１に印
加され、磁気テープに録音される。このとき、ス
イツチ１１−４の浮遊容量による信号洩れやパワ
ーアンプ４のノイズを抑えるため、通常パワーア
ンプ４の入力側の信号ラインと接地間にモニター
スイツチ１１−５を設け、録音時にこれを閉じて
信号ラインを接地するようにしている。 In the above configuration, all switches are switched to the side shown in FIG. 1 during playback. For this reason,
The reproduced signal from the magnetic head 1 is emitted from the speaker 5 via the switch 11-3, the recording/reproducing amplifier 2, the switch 11-4, the volume volume 3, and the power amplifier 4. On the other hand, during recording, all switches are switched to the opposite side as shown in FIG. Therefore, the built-in microphone 6 has a resistor 10 and a switch 1.
Power is supplied via 1-1. Then, the signal input to the microphone 6 is transmitted to the switch 11-
3. The signal is applied to the magnetic head 1 via the recording/reproducing amplifier 2, the switch 11-4, the resistor 8, and the capacitor 9, and is recorded on the magnetic tape. At this time, in order to suppress signal leakage due to the stray capacitance of the switch 11-4 and noise of the power amplifier 4, a monitor switch 11-5 is usually provided between the input side signal line of the power amplifier 4 and the ground, and this is closed during recording. and ground the signal line.
ところが、このように構成すると、録音再生の
切換えに１１−１〜１１−５の合計５つのスイツ
チが必要になり、回路構成が複雑になるという欠
点があつた。 However, with this configuration, a total of five switches 11-1 to 11-5 are required for switching between recording and playback, resulting in a complicated circuit configuration.
発明の目的
本発明はこのような問題を解決するものであ
り、スイツチの共用化により回路構成を簡略化す
ることができるテープレコーダを提供することを
目的とするものである。OBJECTS OF THE INVENTION The present invention is intended to solve these problems, and it is an object of the present invention to provide a tape recorder whose circuit configuration can be simplified by sharing switches.
発明の構成
上記の目的を達成するため、本発明のテープレ
コーダは、固定端子の一方を内蔵マイクロホンへ
の電源ラインに接続し、他方を音声出力回路の信
号ラインに接続し、共通端子を接地した切換スイ
ツチを設け、この切換スイツチを録音再生切換ス
イツチに連動して切換え、録音時には上記信号ラ
インを接地し、再生時には上記電源ラインを接地
することにより、内蔵マイクロホンへの電源の断
続を行なうスイツチと、録音時に不要な信号が出
力されるのを遮断するモニタースイツチとを共用
化し、回路構成の簡略化を図つたことを特長とす
るものである。Structure of the Invention In order to achieve the above object, the tape recorder of the present invention has one of the fixed terminals connected to the power line to the built-in microphone, the other to the signal line of the audio output circuit, and the common terminal is grounded. A changeover switch is provided, and this changeover switch is switched in conjunction with the recording/playback changeover switch, and the above-mentioned signal line is grounded during recording, and the above-mentioned power supply line is grounded during playback, thereby turning on and off the power to the built-in microphone. , a monitor switch that blocks unnecessary signals from being output during recording is shared, simplifying the circuit configuration.
実施例の説明
以下、本発明の実施例について図面とともに説
明する。第２図は本発明の一実施例を示し、第２
図において、第１図と同一機能の部分には同一符
号を付して説明を省略する。ここで１１−６は他
の録音再生切換スイツチ１１−２〜１１−４と連
動して切換わる切換スイツチであり、一方の固定
端子は内蔵マイクロホン６に至る電源ラインに接
続され、他方の固定端子はパワーアンプ４の入力
側の信号ラインに接続され、共通端子は接地され
ている。したがつて、再生時には切換スイツチ１
１−６が図示のように電源ライン側に切換えら
れ、内蔵マイクロホン６への電源供給を遮断する
とともに、信号ラインを接地から浮かせる。この
ため、録音再生アンプ２の出力は何ら遮断される
ことなく音量ボリユーム３、パワーアンプ４を介
してスピーカ５へ供給される。一方、録音時には
切換スイツチ１１−６が信号ライン側に切換わ
る。このため、内蔵マイクロホン６には抵抗１０
を介して電源が供給され、パワーアンプ４の入力
側の信号ラインが接地される。したがつて、内蔵
マイクロホン６が動作してその入力信号が録音さ
れるとともに、パワーアンプ４に入力される洩れ
信号等は切換スイツチ１１−６を介して接地され
る。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows one embodiment of the present invention;
In the figure, parts having the same functions as those in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted. Here, 11-6 is a switch that switches in conjunction with the other recording/playback switch 11-2 to 11-4, one fixed terminal is connected to the power line leading to the built-in microphone 6, and the other fixed terminal is connected to the power line leading to the built-in microphone 6. is connected to the signal line on the input side of the power amplifier 4, and the common terminal is grounded. Therefore, during playback, selector switch 1 is
1-6 is switched to the power line side as shown, cutting off the power supply to the built-in microphone 6 and lifting the signal line from the ground. Therefore, the output of the recording/reproduction amplifier 2 is supplied to the speaker 5 via the volume volume 3 and the power amplifier 4 without being interrupted in any way. On the other hand, during recording, the selector switch 11-6 is switched to the signal line side. For this reason, the built-in microphone 6 has a resistor of 10
Power is supplied through the power amplifier 4, and the signal line on the input side of the power amplifier 4 is grounded. Therefore, the built-in microphone 6 operates and its input signal is recorded, and leakage signals input to the power amplifier 4 are grounded via the changeover switch 11-6.
第３図は第２図に更にマイク端子１２を付加し
た場合の実施例であり、１３はマイク端子１２に
外部マイクが挿入されたときこれに連動して開く
スイツチ、１４は録音モニター用の抵抗である。 Figure 3 shows an embodiment in which a microphone terminal 12 is further added to Figure 2, 13 is a switch that opens in conjunction with the insertion of an external microphone into the microphone terminal 12, and 14 is a resistor for monitoring recording. It is.
このようにしても内蔵マイクロホンによる録音
時にはパワーアンプ４の入力側の信号ラインがス
イツチ１３、切換スイツチ１１−６を介して接地
される。また、この実施例ではマイク端子１２に
外部マイクを挿入し、この外部マイクからの信号
を録音する際には、上記信号ラインが接地から切
り離され、切換スイツチ１１−４を介してとり出
された録音信号が抵抗１４を介してパワーアンプ
４に入力されるから、録音モニターをすることが
できる。 Even in this case, when recording with the built-in microphone, the signal line on the input side of the power amplifier 4 is grounded via the switch 13 and the changeover switch 11-6. In this embodiment, an external microphone is inserted into the microphone terminal 12, and when recording a signal from the external microphone, the signal line is disconnected from the ground and taken out via the changeover switch 11-4. Since the recording signal is input to the power amplifier 4 via the resistor 14, the recording can be monitored.
発明の効果
以上のように本発明は、内蔵マイクロホンへの
電源を断続するスイツチとモニタースイツチとを
１つの切換スイツチで共用し、この切換スイツチ
を録音再生の切換えに連動して切換えるようにし
たものであるから、スイツチ回路を少なくし、回
路構成の簡略化を図ることができる。Effects of the Invention As described above, the present invention uses a single changeover switch for both the switch for intermittent power supply to the built-in microphone and the monitor switch, and this changeover switch is switched in conjunction with the switching of recording and playback. Therefore, the number of switch circuits can be reduced and the circuit configuration can be simplified.
第１図は従来例の回路図、第２図、第３図は本
発明の第１、第２の実施例を示す回路図である。
１……磁気ヘツド、２……録音再生アンプ、３
……音量ボリユーム、４……パワーアンプ、５…
…スピーカ、６……内蔵マイクロホン、７……電
源端子、１１−２〜１１−４……録音再生切換ス
イツチ、１１−６……切換スイツチ、１２……マ
イク端子。
FIG. 1 is a circuit diagram of a conventional example, and FIGS. 2 and 3 are circuit diagrams showing first and second embodiments of the present invention. 1...Magnetic head, 2...Recording/playback amplifier, 3
...Volume volume, 4...Power amplifier, 5...
...Speaker, 6...Built-in microphone, 7...Power terminal, 11-2 to 11-4...Recording/playback selection switch, 11-6...Selection switch, 12...Microphone terminal.
Claims (1)
ラインに接続し、他方を音声出力回路の信号ライ
ンに接続し、共通端子を接地した切換スイツチを
有し、この切換スイツチを録音再生切換スイツチ
に連動して切換え、録音時には上記信号ラインを
接地し、再生時には上記電源ラインを接地するよ
うに構成したことを特徴とするテープレコーダ。1 One of the fixed terminals is connected to the power line to the built-in microphone, the other is connected to the signal line of the audio output circuit, and has a changeover switch with the common terminal grounded, and this changeover switch is linked to the recording/playback changeover switch. A tape recorder characterized in that the signal line is grounded during recording, and the power supply line is grounded during playback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157084A JPS59167803A (en) | 1984-03-05 | 1984-03-05 | Tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157084A JPS59167803A (en) | 1984-03-05 | 1984-03-05 | Tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59167803A JPS59167803A (en) | 1984-09-21 |
| JPS6149723B2 true JPS6149723B2 (en) | 1986-10-30 |
Family
ID=12612100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4157084A Granted JPS59167803A (en) | 1984-03-05 | 1984-03-05 | Tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167803A (en) |
-
1984
- 1984-03-05 JP JP4157084A patent/JPS59167803A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59167803A (en) | 1984-09-21 |
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