JPS63285705A - Double-cassette tape recorder - Google Patents
Double-cassette tape recorderInfo
- Publication number
- JPS63285705A JPS63285705A JP12044287A JP12044287A JPS63285705A JP S63285705 A JPS63285705 A JP S63285705A JP 12044287 A JP12044287 A JP 12044287A JP 12044287 A JP12044287 A JP 12044287A JP S63285705 A JPS63285705 A JP S63285705A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- head
- playback
- reproducing
- reproduction
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 238000010586 diagram Methods 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高速編集機能を有するダブルカセットテープレ
コーダに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a double cassette tape recorder with high speed editing capabilities.
従来の技術
従来、高速編集機能を有するダブルカセットテープレコ
ーダにあっては、再生ヘッドの再生ピーキングは高速編
集時に高音が低下するのを防止するために定速編集機能
のダブルカセットテープレコーダに比較して再生ピーキ
ング周波数を高く設定し、再生ヘッド、録音ヘッドそれ
ぞれに再生ピーキング用コンデンサを設けていた。Conventional technology Conventionally, in a double cassette tape recorder with a high-speed editing function, the playback peaking of the playback head was compared to a double cassette tape recorder with a constant-speed editing function in order to prevent the treble from dropping during high-speed editing. The playback peaking frequency was set high, and a playback peaking capacitor was installed in each of the playback and recording heads.
第２図に従来例を示す。FIG. 2 shows a conventional example.
第２図において、再生時の動作から説明する。Referring to FIG. 2, the operation during reproduction will be explained.
再生時は録再スイッチ７はａ側であシ、録再ヘッド２の
一方の端子は録再スイッチ７によシアースされ、バイア
ス発振装置４は発振動作はしていない。録再ヘッド２の
もう一方の端子は再生ピーキングコンデンサ１４に接続
すると共に録再スイッチ５のａ側と録再スイッチ６のｂ
側に接続している。鴇生ピーキングコンデンサ１４はア
ースされ録再ヘッドのインダクタンスとで高音で並列共
振を起こし、高音の再生特性を改善している。録再スイ
ッチ６のｂ側は再生時は開放であるが、録再スイッチ６
のａ側は再生時は再生ヘッド１に接続している。再生ヘ
ッド１のもう片方の端子は再生アンプ２の入力側に接続
すると共に再生ピーキングコンデンサ１３に接続してお
シ、録再ヘッドの場合と同じようにして高音の再生特性
を改善している。再生ヘッド１からの信号は再生アンプ
２で周波数特性を平坦にし、増巾して出力端子１２よシ
出力すると共に録音アンプ３に加えられる・録音アンプ
３ではコイル１ｏとコンデンサ１１によシ高音で録音ア
ンプ３の増中度を大きくしている。During reproduction, the recording/reproducing switch 7 is set to the a side, one terminal of the recording/reproducing head 2 is sheared by the recording/reproducing switch 7, and the bias oscillator 4 is not in oscillation operation. The other terminal of the recording/reproducing head 2 is connected to the reproduction peaking capacitor 14, and is connected to the a side of the recording/reproducing switch 5 and the b side of the recording/reproducing switch 6.
Connected to the side. The Tokio peaking capacitor 14 is grounded and causes parallel resonance at high frequencies with the inductance of the recording/reproducing head, improving the reproduction characteristics of high frequencies. The b side of the recording/playing switch 6 is open during playback, but the recording/playing switch 6
The a side of is connected to the playback head 1 during playback. The other terminal of the playback head 1 is connected to the input side of the playback amplifier 2 and also to the playback peaking capacitor 13 to improve high frequency playback characteristics in the same manner as in the case of the recording/playback head. The signal from the playback head 1 is flattened in frequency characteristics by the playback amplifier 2, amplified, and outputted to the output terminal 12, and also added to the recording amplifier 3.In the recording amplifier 3, the coil 1o and capacitor 11 are used to produce high-frequency signals. The degree of increase in recording amplifier 3 is increased.
この録音アンプ３で増巾された信号は録音ピーキング用
のコンデンサ９とこのコンデンサ９と並列に接続された
抵抗器８を介して録再スイッチ６でアースされる。電音
時は録再スイッチ６はｂ側となり再生ヘッド１は録再ヘ
ッド２とは接続されずにアースされ、もう一方の端子は
再生時と同じように再生ピーキングコンデンサ１３と再
生アンプ２の入力に接続される。再生アンプ２の動作は
再生時と同じであシ、録音アンプ３の動作も再生時と同
じである。録再スイッチ６は録音時はｂ側となシ録再ヘ
ッド２に録音アンプ３の出力が加えられると共にバイア
ス発振装置４よシ録再ヘッド２に録音バイアスが加えら
れて、磁気テープに信号が録音されることになる。The signal amplified by the recording amplifier 3 is grounded by the recording/reproducing switch 6 via a recording peaking capacitor 9 and a resistor 8 connected in parallel with the capacitor 9. During electric sound, the recording/playback switch 6 is set to the b side, and the playback head 1 is grounded without being connected to the recording/playback head 2, and the other terminal is connected to the input of the playback peaking capacitor 13 and playback amplifier 2 in the same way as during playback. connected to. The operation of the reproduction amplifier 2 is the same as during reproduction, and the operation of the recording amplifier 3 is also the same as during reproduction. The recording/reproducing switch 6 is set to the b side during recording.The output of the recording amplifier 3 is applied to the recording/reproducing head 2, and a recording bias is applied to the recording/reproducing head 2 by the bias oscillator 4, so that a signal is recorded on the magnetic tape. It will be recorded.
発明が解決しようとする問題点
ところが、このような従来のダブルカセットテープレコ
ーダでは、再生ヘッドの再生ピーキング周波数は再生時
も録音時も一定でアリ、高速編集機能のあるものにおい
ては定速時に再生ピーキングを合わせると高速時に、再
生周波数特性の高音部が大巾に低下する。そのため高速
再生に合わせた再生ピーキングとしているため、定速再
生時は周波数特性の高音部が低下する。Problems to be Solved by the Invention However, in conventional double cassette tape recorders like this, the playback peaking frequency of the playback head is constant during playback and recording, and in models with high-speed editing functions, the playback peaking frequency is constant during constant speed playback. When peaking is adjusted, the treble part of the playback frequency response will drop significantly at high speeds. Therefore, since the reproduction peaking is adjusted to match high-speed reproduction, the treble part of the frequency characteristic decreases during constant-speed reproduction.
本発明は上記の問題を解決するもので、テープ再生時の
再生スピード差による再生周波数特性の高音部の低下を
未然に防止し、簡単な構成により経済的にも有利なダブ
ルカセットテープレコーダを提供することを目的とする
。The present invention solves the above-mentioned problems, and provides an economically advantageous double cassette tape recorder with a simple configuration that prevents deterioration in the treble part of the playback frequency characteristics due to differences in playback speed during tape playback. The purpose is to
問題点を解決するための手段
上記の目的を達成するために本発明のダブルカセットテ
ープレコーダは、再生アンプ入力とアース間に再生ピー
キング用コンデンサを接続したものである。Means for Solving the Problems In order to achieve the above object, the double cassette tape recorder of the present invention has a reproduction peaking capacitor connected between the reproduction amplifier input and ground.
作用
本発明は、上記した構成により、再生時と録音時で再生
ヘッドの再生ピーキング周波数を変化させることにより
、高速再生時の周波数特性を悪化させずに、定速再生時
の周波数特性を改善することができることになる。Effect of the Invention The present invention improves the frequency characteristics during constant-speed playback without deteriorating the frequency characteristics during high-speed playback by changing the playback peaking frequency of the playback head between playback and recording using the above-described configuration. You will be able to do that.
実施例
第１図は本発明の一実施例におけるダブルカセットテー
プレコーダの回路図である。第１図において、第２図と
異なるところは、第２図の従来例にある再生ピーキング
コンデンサ１４がなく、さらに再生ピーキングコンデン
サ１３は再生ヘッド１に接続されているのではなく、再
生ヘッド１とアース間に接続している。再生ピーキング
周波数は再生ピーキングコンデンサ１３と再生ヘッド１
や録再ヘッド２のインダクタンスで決定される。Embodiment FIG. 1 is a circuit diagram of a double cassette tape recorder in one embodiment of the present invention. 1 differs from FIG. 2 in that there is no regenerative peaking capacitor 14 in the conventional example shown in FIG. 2, and the regenerative peaking capacitor 13 is not connected to the reproducing head 1, but is Connected between ground. The reproduction peaking frequency is determined by the reproduction peaking capacitor 13 and the reproduction head 1.
It is determined by the inductance of the recording/reproducing head 2.
再生時は再生ヘッド１と録再ヘッド２が直列に接続され
ているため、上記ヘッドの合成インダクタンスと再生ピ
ーキングコンデンサ１３で再生ピーキング周波数が決ま
る。録音時は再生ヘッド１と再生ピーキングコンデンサ
１３とで再生ピーキング周波数が決まる。よって再生ヘ
ッド１と録再ヘッド２のインダクタンスが同じであれば
、再生ピとなる。During reproduction, since the reproduction head 1 and the recording/reproduction head 2 are connected in series, the reproduction peaking frequency is determined by the composite inductance of the head and the reproduction peaking capacitor 13. During recording, the playback peaking frequency is determined by the playback head 1 and the playback peaking capacitor 13. Therefore, if the inductances of the reproducing head 1 and the recording/reproducing head 2 are the same, the reproducing head 1 and the recording/reproducing head 2 have the same inductance.
発明の効果
以上のように本発明によれば、ダブルカセットテープレ
コーダの再生アンプの入力とアース間に再生ピーキング
コンデンサを接続して、再生時は再生ヘッドと録再ヘッ
ドが直列に接続するため再生ピーキング周波数が低くな
シ、録音時は再生ヘッドのみとなり再生ピーキング周波
数が高くなるため、高速再生時の周波数特性を悪化させ
ずに、再生周波数特性を改善することができ、実用上有
利である。Effects of the Invention As described above, according to the present invention, a reproduction peaking capacitor is connected between the input of the reproduction amplifier of a double cassette tape recorder and the ground, and during reproduction, the reproduction head and the recording/reproduction head are connected in series, so that reproduction is not possible. Since the peaking frequency is low and only the playback head is used during recording, the playback peaking frequency becomes high, so the playback frequency characteristics can be improved without deteriorating the frequency characteristics during high-speed playback, which is advantageous in practice.
第１図は本発明によるダブルカセットテープレコーダの
一実施例の回路図、第２図は従来のダブルカセットテー
プレコーダの回路図である。
１・・・・・・再生ヘッド、２・・・・・・録再ヘッド
、３・・・・・・録音アンプ、４・・・・・・バイアス
発振装置、６．６゜７・・・・・・録再スイッチ、８・
・・・・・抵抗器、９・・・・・・コンデンサ、１０・
・・・・・コイル、１１・・・・・・コンデンサ、１２
・・・・・出力端子、１３．１４・・・・・・再生ピー
キングコンデンサ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
図FIG. 1 is a circuit diagram of an embodiment of a double cassette tape recorder according to the present invention, and FIG. 2 is a circuit diagram of a conventional double cassette tape recorder. 1... Playback head, 2... Recording/playback head, 3... Recording amplifier, 4... Bias oscillator, 6.6°7... ... Recording/playback switch, 8.
...Resistor, 9...Capacitor, 10.
... Coil, 11 ... Capacitor, 12
...Output terminal, 13.14...Regeneration peaking capacitor. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure
Claims (1)
直列に接続するように構成した高速編集機能を有するダ
ブルカセットテープレコーダにあって、再生アンプの入
力とアース間にコンデンサを挿入したことを特徴とする
ダブルカセットテープレコーダ。In a double cassette tape recorder with a high-speed editing function configured such that the first playback head and the second recording/playback head are connected in series during tape playback, a capacitor is inserted between the input of the playback amplifier and ground. A double cassette tape recorder featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12044287A JP2692077B2 (en) | 1987-05-18 | 1987-05-18 | Double cassette tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12044287A JP2692077B2 (en) | 1987-05-18 | 1987-05-18 | Double cassette tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63285705A true JPS63285705A (en) | 1988-11-22 |
| JP2692077B2 JP2692077B2 (en) | 1997-12-17 |
Family
ID=14786306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12044287A Expired - Lifetime JP2692077B2 (en) | 1987-05-18 | 1987-05-18 | Double cassette tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2692077B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632430A2 (en) * | 1993-06-30 | 1995-01-04 | Kabushiki Kaisha Toshiba | Amplifying circuit for magnetic record and playback apparatus |
-
1987
- 1987-05-18 JP JP12044287A patent/JP2692077B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632430A2 (en) * | 1993-06-30 | 1995-01-04 | Kabushiki Kaisha Toshiba | Amplifying circuit for magnetic record and playback apparatus |
| EP0632430A3 (en) * | 1993-06-30 | 1996-02-28 | Toshiba Kk | Amplifying circuit for magnetic record and playback apparatus. |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2692077B2 (en) | 1997-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070905 Year of fee payment: 10 |