JPH01264604A - Control circuit for tape recorder - Google Patents
Control circuit for tape recorderInfo
- Publication number
- JPH01264604A JPH01264604A JP63094217A JP9421788A JPH01264604A JP H01264604 A JPH01264604 A JP H01264604A JP 63094217 A JP63094217 A JP 63094217A JP 9421788 A JP9421788 A JP 9421788A JP H01264604 A JPH01264604 A JP H01264604A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output signal
- level
- amplifier
- generated
- 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
- 238000001514 detection method Methods 0.000 claims description 10
- 238000009499 grossing Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 abstract description 11
- 230000002238 attenuated effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、公演会や会議等の内容を記録することが出来
るメモ録用のテープレコーダの制御回路に関するもので
、特に必要時のみテープを走行させて記録を行ない得る
テープレコーダの制御回路に関する。Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a control circuit for a memo tape recorder that can record the contents of performances, meetings, etc. The present invention relates to a control circuit for a tape recorder that can record by running a tape recorder.
（ロ）従来の技術
会議等の内容を記録する為のテープレコーダは、通常の
ハイファイ用テープレコーダの如き音響特性は要求され
ないが、人声を正しく記録する為の細工、例えばマイク
ロフォンの指向性や周波数特性に関する細工が施こされ
、メモ録という１つのジャンルを形成している。第２図
は、その様なテープレコーダの内部回路を示すもので、
信号源（１）から得られる記録されるべき信号は、プリ
アンプ（２〉で増幅された後、ボリューム（３）でレベ
ル調整され、メインアンプ（４）で更に増幅された後出
力端子（５）から磁気ヘッドに供給される。また、磁気
テープは、モータ駆動回路（６）により駆動されるモー
タ（７）により走行駆動きれ、前記磁気ヘッドにより前
記磁気ケーーブへの記録が行なわれる。(b) Conventional tape recorders used to record the contents of technical conferences, etc. are not required to have the same acoustic characteristics as ordinary high-fidelity tape recorders, but they do require special measures to record human voices correctly, such as the directivity of the microphone, etc. The frequency characteristics have been modified to form a genre called memo. Figure 2 shows the internal circuit of such a tape recorder.
The signal to be recorded obtained from the signal source (1) is amplified by the preamplifier (2), level-adjusted by the volume (3), further amplified by the main amplifier (4), and then sent to the output terminal (5). The magnetic tape is then driven by a motor (7) driven by a motor drive circuit (6), and the magnetic head records information in the magnetic cave.
第２図の回路の場合、テープレコーダの記録釦の押圧に
応じて電源スィッチ＜８）が閉成し、電源電圧（＋ＶＣ
Ｃ）がプリアンプ（２）、メインアンプク４）及びモー
タ駆動回路（６〉に供給され、記録動作が行なわれる。In the case of the circuit shown in Figure 2, the power switch <8) is closed in response to the press of the record button of the tape recorder, and the power supply voltage (+VC
C) is supplied to the preamplifier (2), main amplifier 4) and motor drive circuit (6>), and a recording operation is performed.
尚、テープレコーダに用いられるモータ駆動回路は、「
′８８戸洋半導体データブック産業機器用モノリシック
集積回路編」第３９７頁及び第３９８頁に記載されてい
る。The motor drive circuit used in tape recorders is
It is described on pages 397 and 398 of ``88 Doyo Semiconductor Data Book, Monolithic Integrated Circuits for Industrial Equipment Edition''.
（ハ）発明が解決しようとする課題
しかして、会議の内容等を記録する場合、その時間が長
くなると、磁気テープの量が不足し、途中で磁気テープ
の交換をしなければならなくなる。また、後日磁気テー
プに記録された内容を再生する場合、空白部が多いと全
体として再生時間が長くなるという問題がある。(c) Problems to be Solved by the Invention However, when recording the contents of a meeting, etc., if the recording time becomes long, the amount of magnetic tape becomes insufficient, and the magnetic tape must be replaced midway through. Furthermore, when reproducing the content recorded on the magnetic tape at a later date, there is a problem that the overall reproduction time becomes longer if there are many blank areas.
前記問題を解決する為には、会議の途中で会話が途切れ
る毎にテープレコーダを停止状態にすればよいが、操作
が煩られしいという問題や再記録時の頭切れの問題等、
別の問題が生じるので好ましくない。In order to solve the above problem, it is possible to stop the tape recorder every time the conversation breaks during the meeting, but this can cause problems such as cumbersome operation and problems with cutting off the beginning when re-recording.
This is not preferable because it causes another problem.
（ニ）課題を解決するだめの手段
本発明は上述の点に鑑み成されたもので、記録されるべ
き入力信号を増幅する増幅回路と、該増幅回路の出力信
号のレベルを検出するレベル検出回路と、該レベル検出
回路の出力信号により動作が制御されるモータ駆動回路
とを備える点を特徴とする。また、増幅回路に含まれる
ボリュームと直列に抵抗を接続し、ボリュームが絞られ
た状態においても増幅回路から出力信号が発生ずる様に
した点を特徴とする。更に、前記抵抗にスイッチを並列
接続し、記録時と再生時とで前記スイッチを切換える点
を特徴とする。また更に、レベル検出回路中にヒステリ
シスを持つ比較回路を配置したことを特徴とする。(d) Means for Solving the Problems The present invention has been made in view of the above points, and includes an amplifier circuit that amplifies an input signal to be recorded, and a level detector that detects the level of the output signal of the amplifier circuit. The present invention is characterized in that it includes a circuit and a motor drive circuit whose operation is controlled by the output signal of the level detection circuit. Another feature is that a resistor is connected in series with the volume included in the amplifier circuit so that an output signal is generated from the amplifier circuit even when the volume is turned down. Furthermore, the present invention is characterized in that a switch is connected in parallel to the resistor, and the switch is switched between recording and reproduction. Furthermore, the present invention is characterized in that a comparison circuit having hysteresis is arranged in the level detection circuit.
（ホ）作用
本発明に依れば、記録されるべき入力信号を増幅回路に
より所定倍に増幅して出力端子に発生させる一二とが出
来る。そして、増幅回路の出力信号レベルがレベル検出
回路で検出され、動作制御信号としてモータ駆動回路に
印加されるので、所定レベル以上の前記出力信号が検出
されたときのみモータ駆動回路を動作させることが出来
、記録を行なうことができる。また、ボリュームに直列
に抵抗が挿入されている為、前記ボリュームを完全に絞
った状態においても増幅回路から出力信号を発生させる
ことが出来る。その場合、前記抵抗にスイッチを並列接
続し、テープレコーダを再生状態に切換えたとき前記ス
イッチを閉成すれば、再生時において増幅回路の出力信
号を完全に零にすることが出来る。更に、レベル検出回
路中にヒステリシスを持った比較回路を備える為、−度
作動したモータ駆動回路を、空白が生じてもしばらくの
開動作状態に維持出来る。(E) Function According to the present invention, it is possible to amplify the input signal to be recorded by a predetermined factor using the amplifier circuit and generate it at the output terminal. Since the output signal level of the amplifier circuit is detected by the level detection circuit and applied to the motor drive circuit as an operation control signal, the motor drive circuit can be operated only when the output signal of a predetermined level or higher is detected. Yes, you can record it. Furthermore, since a resistor is inserted in series with the volume, an output signal can be generated from the amplifier circuit even when the volume is completely turned down. In that case, if a switch is connected in parallel to the resistor and the switch is closed when the tape recorder is switched to the playback state, the output signal of the amplifier circuit can be made completely zero during playback. Furthermore, since a comparator circuit with hysteresis is provided in the level detection circuit, a motor drive circuit that has been activated can be maintained in an open operation state for a while even if a blank occurs.
くへ）実施例
第１図は、本発明の一実施例を示す回路図で、（９）は
記録されるべき入力信号を発生ずる入力信号源、（１０
）は前記入力信号を増幅するプリアンプ、（１１）は該
プリアンプ（１０）の出力端に接続されたレベル調整用
のボリューム、（１２）は該ボリューム（１１）に直列
接続された抵抗、（１３）は該抵抗＜１２）に並列接続
された第１スイツチ、（１４）は前記ボリューム（１１
）の可動端子に得られる信号を増幅するメインアンプ、
＜１５）は該メインアンプけ４）の出力信号を磁気ヘッ
ド（図示せず）に供給する為の出力端子、（１６）は前
記メインアンプ（１４〉の出力信号を基準電圧と比較す
る第１比較回路、（１７）は該第１比較回路（１６〉の
出力信号を平滑するコンデンサ、＜１８）は該コンデン
サ（１７）の端子電圧が所定値になったとき出力信号を
発生ずるヒステリシスを持った第２比較回路、（１９）
は磁気デーゾを駆動する為のモータ、（２０）は該モー
タ（１９）を駆動する為のモータ駆動回路、及び＜２１
）は前記第２比較回路〈１８）の出力信号に応じて前記
モータ駆動回路り２０）の動作電源を開閉する第２スイ
ツチである。(9) Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention, in which (9) is an input signal source that generates an input signal to be recorded, (10) is a circuit diagram showing an embodiment of the present invention;
) is a preamplifier that amplifies the input signal, (11) is a level adjustment volume connected to the output end of the preamp (10), (12) is a resistor connected in series with the volume (11), (13) ) is the first switch connected in parallel to the resistor <12), and (14) is the volume (11)
) main amplifier that amplifies the signal obtained at the movable terminal of
<15) is an output terminal for supplying the output signal of the main amplifier 4) to a magnetic head (not shown), and (16) is a first terminal for comparing the output signal of the main amplifier (14) with a reference voltage. A comparison circuit (17) is a capacitor for smoothing the output signal of the first comparison circuit (16), and <18) has hysteresis to generate an output signal when the terminal voltage of the capacitor (17) reaches a predetermined value. second comparison circuit, (19)
(20) is a motor drive circuit for driving the motor (19), and <21
) is a second switch that opens and closes the operating power supply of the motor drive circuit 20) in accordance with the output signal of the second comparison circuit (18).
次に動作を説明する。入力信号源（９）から発生ずる入
力信号を磁気テープに記録する為、記録釦（図示上ず）
を抑圧すると、第１スイツチ（１３）が開放するととも
に、前記入力信号がプリアンプ（１０）で増幅きれ、ボ
リューム（１１）で減衰され、更にメインアンプ〈１４
）で増幅されて、出力端子＜１５〉に導出される。その
時、前記メインアンプ（１４）の出力信号レベルが基準
電圧より低ければ、第１比較回路（１６）から出力信号
が発生せず、コンデンサ（１７）の充電が行なわれない
。その為、第２比較回路（１８）から出力信号が発生せ
ｊ゛、第２スイツチク２１〉が開放状態を保ち、モータ
駆動回路（２０）が動作しない。従って、モータ（１９
〉が回転せず、磁気テープの走行が行なわれない。メイ
ンアンプ＜１４〉から基準電圧よりも大１〜ベルの出力
信号が発生すると、第１比較回路（１６）から出力信号
が発生し、コンデンサ（１７）の充電が開始される。前
記コンデンサ（１７）の充電時定数は比較的短かく、前
記コンデンサ（１７〉の端子電圧は前記第１比較回路（
１６）の大レベルの出力信号に応じて略直ちに上昇し、
それに応じて第２比較回路（１８）から出力信号が発生
ずる。しかして、前記第２比較回路（１８）の出力信号
は、第２スイツチ（２１）を閉成する為、モータ駆動回
路（２０）が動作し、モータ（１９）が回転を開始する
。従って、出力端子（１５）に発生ずる出力信号は、磁
気ヘッドを介して磁気テープに記録される。尚、その時
のアタックタイムは、５０ｍ秒以下の短かい値になる。Next, the operation will be explained. A record button (not shown) is used to record the input signal generated from the input signal source (9) onto the magnetic tape.
When the first switch (13) is suppressed, the first switch (13) is opened, and the input signal is amplified by the preamp (10), attenuated by the volume (11), and further amplified by the main amplifier (14).
) and output to the output terminal <15>. At that time, if the output signal level of the main amplifier (14) is lower than the reference voltage, no output signal is generated from the first comparison circuit (16) and the capacitor (17) is not charged. Therefore, an output signal is generated from the second comparison circuit (18), the second switch 21 remains open, and the motor drive circuit (20) does not operate. Therefore, the motor (19
> does not rotate and the magnetic tape does not run. When the main amplifier <14> generates an output signal greater than the reference voltage, an output signal is generated from the first comparator circuit (16), and charging of the capacitor (17) is started. The charging time constant of the capacitor (17) is relatively short, and the terminal voltage of the capacitor (17) is controlled by the first comparison circuit (
16) rises almost immediately in response to the high level output signal,
In response, an output signal is generated from the second comparator circuit (18). The output signal of the second comparator circuit (18) closes the second switch (21), so the motor drive circuit (20) operates and the motor (19) starts rotating. Therefore, the output signal generated at the output terminal (15) is recorded on the magnetic tape via the magnetic head. Incidentally, the attack time at that time is a short value of 50 msec or less.
入力信号レベルが低下し、メインアンプ（１４）の出力
信号レベルが第１比較回路（１６）の基準電圧より低く
なると、前記第１比較回路（１６）の出力信号が発生し
なくなり、コンデンサ（１７）が放電を開始する。その
時、前記コンデンサ（１７）の放電時定数は比較的大に
成きれている為、かつ第２比較回路り１８）がヒステリ
シスを持っている為、前記第２比較回路〈１８〉から出
力信号が発生し続け、モータ（１９）が回転を継続する
。ここで、第２比較回路（１８）は、入力信号が印加妨
れていない時、第１の基準レベルを有しており、入力信
号が印加され、そのレベルが前記第１の基準レベルを越
えたとき出力信号を発生するとともに、基準レベルを前
記第１の基準レベルより低い第２の基準レベルに変更し
、入力信号レベルが低下していき前記第２の基準レベル
より低くなった時、出力信号の発生を停止−するととも
に、基準レベルを前記第１の基準レベルに変更する様に
動作する。しかして、コンデンサ（１７）による第２比
較回路（１８）の入力信号の保持と第２比較回路け８〉
のヒステリシスとにより、第２比較回路（１８）の出力
信号は、−度発生するとパワーアンプ（１４）の出力信
号レベルが低下しても所定期間発生し続ける。そして、
前記所定期間以上、パワーアンプク１４）の出力信号レ
ベルが低下し続けたとき、第２比較回路〈１８〉は出力
信号の発生を停止する。従って、第１図の回路を用いれ
ば、入力信号が印加されない状態が長く続いたとき、モ
ータ（１９）の回転を停止させ、磁気テープの走行を停
止させることが出来、前記磁気テープのむだ使いを防止
出来る。When the input signal level decreases and the output signal level of the main amplifier (14) becomes lower than the reference voltage of the first comparison circuit (16), the output signal of the first comparison circuit (16) is no longer generated and the capacitor (17) ) starts discharging. At that time, since the discharge time constant of the capacitor (17) is relatively large and the second comparator circuit (18) has hysteresis, the output signal from the second comparator circuit (18) is continues to occur, and the motor (19) continues to rotate. Here, the second comparator circuit (18) has a first reference level when the input signal is not blocked, and when the input signal is applied, the level exceeds the first reference level. When the input signal level decreases and becomes lower than the second reference level, the reference level is changed to a second reference level lower than the first reference level, and when the input signal level decreases and becomes lower than the second reference level, the output signal is generated. It operates to stop the generation of the signal and to change the reference level to the first reference level. Therefore, the input signal of the second comparator circuit (18) is held by the capacitor (17) and the second comparator circuit (8)
Due to the hysteresis, the output signal of the second comparator circuit (18) continues to be generated for a predetermined period of time even if the output signal level of the power amplifier (14) decreases. and,
When the output signal level of the power amplifier 14) continues to decrease for the predetermined period or longer, the second comparison circuit <18> stops generating the output signal. Therefore, by using the circuit shown in Fig. 1, when the input signal is not applied for a long time, it is possible to stop the rotation of the motor (19) and stop the running of the magnetic tape, thereby wasting the magnetic tape. can be prevented.
記録状態においては、第１スイツチ（１３）が開放して
いる為に、ボリューム（１１）と直列に抵抗（１２）が
配置きれることになる。その為、ボリュームく１１）を
−杯に絞った状態においても、前記抵抗（１２）の両端
に発生する出力信号がメインアンプ（１４）に印加され
、前記ボリューム（１１〉の位置に起因する記録停止と
いう誤動作が防止出来る。In the recording state, since the first switch (13) is open, the resistor (12) can be placed in series with the volume (11). Therefore, even when the volume (11) is turned down to -, the output signal generated at both ends of the resistor (12) is applied to the main amplifier (14), resulting in the recording caused by the position of the volume (11). Malfunctions such as stops can be prevented.
尚、抵抗（１２）がボリューム（１１）に直列接続され
ると、再生時にボリュームを一杯に絞っても音が漏れる
という問題を生じる。その為、前記抵抗（１２）に第１
スイツチ（１３）を並列接続し、再生時に前記第１スイ
ツチ（１３）を閉成して音漏れを防止している。また、
第２スイツチ（２１）は、記録時においては第２比較回
路＜１８）の出力信号により切換制御されるが、再生時
には強制信号が印加され常に閉成状態を保つ様に制御さ
れる。Incidentally, if the resistor (12) is connected in series with the volume (11), a problem arises in that the sound leaks even when the volume is turned all the way down during playback. Therefore, the resistor (12) has a first
Switches (13) are connected in parallel, and the first switch (13) is closed during playback to prevent sound leakage. Also,
During recording, the second switch (21) is switched and controlled by the output signal of the second comparator circuit <18), but during reproduction, a forced signal is applied to it so that it always remains closed.
くト〉発明の効果
以上述べた如く本発明に依れば、所定レベル以上の記録
されるべき信号の存在時のみ磁気テープの走行を行なう
様にしているので、前記磁気テープの消費量を大幅に減
少させることが出来る。また、ボリュームと直列に抵抗
を挿入し、前記ボリュームが絞られた状態においてもパ
ワーアンプから出力信号が発生する様にしているので、
ボリュームの状態に起因する誤動作を防止し得る。Effects of the Invention As described above, according to the present invention, since the magnetic tape is run only when there is a signal of a predetermined level or higher to be recorded, the consumption of the magnetic tape can be greatly reduced. can be reduced to In addition, a resistor is inserted in series with the volume so that an output signal is generated from the power amplifier even when the volume is turned down.
Malfunctions due to volume status can be prevented.
更に、前記抵抗と並列にスイッチを接続し、該スイッチ
を再生時に閉成しているので、再生時における音漏れを
防止出来る。また更に、レベル検出回路を第１比較回路
と平滑回路とヒステリシスを有する第２比較回路とによ
って構成しているので、無信号状態が短時間しか続かな
い場合は、磁気テープを正常に走行させることが出来る
。Furthermore, since a switch is connected in parallel with the resistor and is closed during playback, sound leakage during playback can be prevented. Furthermore, since the level detection circuit is composed of a first comparison circuit, a smoothing circuit, and a second comparison circuit having hysteresis, it is possible to run the magnetic tape normally if a no-signal state lasts only a short time. I can do it.
第１図は、本発明の一実施例を示す回路図、及び第２図
は従来のテープレコーダの内部回路を示す回路図である
。
り１０）・・・プリアンプ、 ＜１１）・・・ボリュー
ム、 （１２）・・・抵抗、 り１３）・・・第１スイ
ツチ、（１４）・・・メインアンプ、 （１６）・・・
第１比較回路、 （１７）・・・コンデンサ、 （１８
）・・・第２比較回路、 （２０）・・・モータ駆動回
路、 （２１）・・・第２スイツチ。FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an internal circuit of a conventional tape recorder. 10)...Preamplifier, <11)...Volume, (12)...Resistor, 13)...1st switch, (14)...Main amplifier, (16)...
First comparison circuit, (17)... capacitor, (18
)...Second comparison circuit, (20)...Motor drive circuit, (21)...Second switch.
Claims (4)
供給する増幅回路と、該増幅回路の出力信号のレベルを
検出するレベル検出回路と、該レベル検出回路の出力信
号に応じて制御されるモータ駆動回路とから成り、前記
レベル検出回路の出力信号が発生したときのみ前記モー
タ駆動回路を動作させ磁気テープへの記録を行なう様に
したことを特徴とするテープレコーダの制御回路。(1) An amplifier circuit that amplifies the input signal to be recorded and supplies it to the magnetic head, a level detection circuit that detects the level of the output signal of the amplifier circuit, and a level detection circuit that is controlled according to the output signal of the level detection circuit. 1. A control circuit for a tape recorder, comprising: a motor drive circuit; the motor drive circuit is operated only when an output signal from the level detection circuit is generated to perform recording on a magnetic tape.
する第１増幅器と、該第１増幅器の出力信号レベルを調
整するボリュームと、該ボリュームに直列接続された抵
抗と、前記ボリュームでレベルが調整された信号を増幅
する第２増幅器とから成り、前記抵抗は前記ボリューム
が最小に絞られた状態においても、所定レベル以上の入
力信号に対して前記第２増幅器から出力信号が発生する
様に配置されていることを特徴とする請求項第１項記載
のテープレコーダの制御回路。(2) The amplification circuit includes a first amplifier that amplifies an input signal to be recorded, a volume that adjusts the output signal level of the first amplifier, a resistor connected in series with the volume, and a level that is adjusted by the volume. and a second amplifier that amplifies the adjusted signal, and the resistor is arranged so that an output signal is generated from the second amplifier in response to an input signal of a predetermined level or higher even when the volume is turned down to the minimum. 2. A control circuit for a tape recorder according to claim 1, wherein the control circuit is arranged in a tape recorder.
イッチを記録時に開放、再生時に閉成となる様に切換制
御することを特徴とする請求項第２項記載のテープレコ
ーダの制御回路。(3) A control circuit for a tape recorder according to claim 2, characterized in that a switch is provided that is connected in parallel to the resistor, and the switch is controlled to be open during recording and closed during playback.
レベルが所定値以上か否かを比較する第１比較回路と、
該第１比較回路の出力信号を平滑する平滑回路と、該平
滑回路の出力信号をヒステリシスを持って検出する第２
比較回路とから成ることを特徴とする請求項第１項記載
のテープレコーダの制御回路。(4) The level detection circuit includes a first comparison circuit that compares whether the output signal level of the amplifier circuit is equal to or higher than a predetermined value;
a smoothing circuit for smoothing the output signal of the first comparison circuit; and a second smoothing circuit for detecting the output signal of the smoothing circuit with hysteresis.
2. A control circuit for a tape recorder according to claim 1, further comprising a comparison circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63094217A JP2657064B2 (en) | 1988-04-15 | 1988-04-15 | Control circuit of tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63094217A JP2657064B2 (en) | 1988-04-15 | 1988-04-15 | Control circuit of tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01264604A true JPH01264604A (en) | 1989-10-20 |
| JP2657064B2 JP2657064B2 (en) | 1997-09-24 |
Family
ID=14104150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63094217A Expired - Lifetime JP2657064B2 (en) | 1988-04-15 | 1988-04-15 | Control circuit of tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2657064B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319628A (en) * | 1991-07-08 | 1994-06-07 | U.S. Philips Corporation | Device for recording an information signal and a related auxiliary signal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720937A (en) * | 1980-07-11 | 1982-02-03 | Olympus Optical Co Ltd | Automatic starter |
| JPS5910142U (en) * | 1982-07-09 | 1984-01-23 | 松下電器産業株式会社 | tape recorder |
| JPS60195753A (en) * | 1984-03-16 | 1985-10-04 | Sony Corp | Sound-driven tape recorder |
| JPS60159536U (en) * | 1984-03-28 | 1985-10-23 | ソニー株式会社 | audio driven tape recorder |
| JPS6145443A (en) * | 1984-08-10 | 1986-03-05 | Matsushita Electric Ind Co Ltd | Tape recorder provided with voice operation |
-
1988
- 1988-04-15 JP JP63094217A patent/JP2657064B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720937A (en) * | 1980-07-11 | 1982-02-03 | Olympus Optical Co Ltd | Automatic starter |
| JPS5910142U (en) * | 1982-07-09 | 1984-01-23 | 松下電器産業株式会社 | tape recorder |
| JPS60195753A (en) * | 1984-03-16 | 1985-10-04 | Sony Corp | Sound-driven tape recorder |
| JPS60159536U (en) * | 1984-03-28 | 1985-10-23 | ソニー株式会社 | audio driven tape recorder |
| JPS6145443A (en) * | 1984-08-10 | 1986-03-05 | Matsushita Electric Ind Co Ltd | Tape recorder provided with voice operation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319628A (en) * | 1991-07-08 | 1994-06-07 | U.S. Philips Corporation | Device for recording an information signal and a related auxiliary signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2657064B2 (en) | 1997-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |