JPS60179901A - Magnetic sound recording and reproducing device - Google Patents
Magnetic sound recording and reproducing deviceInfo
- Publication number
- JPS60179901A JPS60179901A JP27918584A JP27918584A JPS60179901A JP S60179901 A JPS60179901 A JP S60179901A JP 27918584 A JP27918584 A JP 27918584A JP 27918584 A JP27918584 A JP 27918584A JP S60179901 A JPS60179901 A JP S60179901A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- voltage
- magnetic
- transistor
- sound recording
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/03—Biasing
Abstract
Description
【発明の詳細な説明】
[発明の技術分野]
本発明は磁気録音再生過程に於いて特性の異なる各種の
磁気アープに対して最適の録音バイノ7ス電流が得られ
るようにした装置における表示に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a display in a device that allows optimum recording binocular current to be obtained for various types of magnetic arps with different characteristics in the process of magnetic recording and reproduction. .
[従来の技術]
一般にフープレコーダ等に使用する磁気アープの最適録
音バイアス電流値番よアープに塗布されている磁性材の
材質、形状、塗fri厚等の種々の要因により異なるが
良好な録音再生特性を得るためには磁気アープの種類を
問わず最適録音バイアス電流が要求される。[Prior Art] Generally, the optimal recording bias current value of a magnetic arp used in a hoop recorder etc. varies depending on various factors such as the material, shape, and coating thickness of the magnetic material coated on the arp, but it is necessary to obtain good recording and playback. In order to obtain the characteristics, an optimum recording bias current is required regardless of the type of magnetic arp.
このため従来は低周波信号(例えば400 N Zある
いはlKH2等)を用いて録音バイアス電流を手動で可
変さヒながら録音して最適値、即ち再生レベルが最大と
なる最高感度バイアスあるいt、1上記バイアスより名
干深めの録音バイアス電流値に合わせ゛(いたが最近は
〔特開昭48−338 (、>6、同48−55713
)等の装置が発明されている。しかしこれらの方法では
第2図に示す如く録音バーイアスミ流対再生レベルの′
48冒11が異なった場合、特性Aの磁気テープに対し
ては最大値の近傍に、文特性I3の磁気j−ブに対して
は最大値を超えてかなり深めの録音バイアス電流値に設
定されてしまい録音バイアス電流の設定値が大幅にズレ
る危険性を持っている。磁気録音再生過程に於いてこの
録音バイアスは諸特性の基本となるものであってダイナ
ミックレンジ及び周波数特性の点で上−記の録音バイア
ス電流の設定値が大幅にずれると好ましい結果は得られ
ないと同時に表示に関しては特開昭48−371.05
等の発明もされ(いるが、これらの発明には録音バイア
ス電流を自動的に調整している期間、録音バイアス自動
調整装置が作動しているか否かの表示がないため、使用
に当り使用者にと・)で非常な不安感を与える欠点があ
った。For this reason, in the past, the recording bias current was manually varied using a low frequency signal (for example, 400 NZ or lKH2, etc.) while recording, and the optimum value was set, that is, the highest sensitivity bias or t,1 at which the playback level was maximum. Adjust to a recording bias current value that is deeper than the above bias.
) and other devices have been invented. However, with these methods, as shown in Figure 2,
48 and 11 are different, the recording bias current value is set near the maximum value for a magnetic tape with characteristic A, and is set to a considerably deeper recording bias current value exceeding the maximum value for a magnetic tape with characteristic I3. There is a risk that the setting value of the recording bias current will deviate significantly. In the magnetic recording and playback process, this recording bias is the basis of various characteristics, and in terms of dynamic range and frequency characteristics, if the setting value of the recording bias current mentioned above deviates significantly, favorable results will not be obtained. At the same time, regarding the display, JP-A-48-371.05
There have also been inventions such as the following, but these inventions do not indicate whether or not the recording bias automatic adjustment device is operating during the period when the recording bias current is automatically adjusted. Nito) had the drawback of giving a very uneasy feeling.
[本発明の目的]
本発明は断る欠点を考慮し各種の特性の異なる磁気テー
プに対しても再生!ベルが最大値を超えである規定のレ
ベルまで低下する深めの録音バイアス電流が自動的に得
られる録音バ、イアス白動調整装置の動作中に、上記装
置が動作中であることを表示して、この表示により使用
者の不安感を払拭する表示装置を備えlζ磁気録音再生
装置を提供せ/vどするものである。[Object of the present invention] The present invention takes into consideration the drawbacks mentioned above and can reproduce magnetic tapes with various characteristics! During operation of the recording bias adjustment device, which automatically obtains a deep recording bias current that reduces the bias current to a specified level when the signal exceeds the maximum value, an indication that the above device is in operation is displayed. , it is an object of the present invention to provide a magnetic recording and reproducing device equipped with a display device that dispels the user's sense of anxiety through this display.
[実施例]、
以下、本発明の一実施例を示す第1図とその動作状態を
示す第3図のタイミングチト−1〜にJ、り説明覆る。[Embodiment] Hereinafter, timing charts 1 to 1 of FIG. 1 showing an embodiment of the present invention and FIG. 3 showing its operating state will be explained.
先ず通常の録音再生状態即ち楽音或いはg声等の信号の
録音百11についl概略の動作を説明する。First, the general operation of the normal recording/reproducing state, that is, recording of signals such as musical tones or G-voice will be explained.
録音入ノJ端子7からの信号は実線ぐ示す如く接続され
たリレー接点RL1aを経て録音アンプ5で増巾されて
、録音バ・イアス用発振器10からの録音バイアスと合
成させて録音ヘッド2に供給され、磁気1−14に録音
される。磁気アープ4は矢印ひ示づ方向に走行して再生
ヘッド3で再生され、再生アンプ6で増11】されて、
実線で示す如く接続されたリレー接点RL1bを経て自
生出力端子8に導出される。The signal from the recording input J terminal 7 passes through the relay contact RL1a connected as shown by the solid line, is amplified by the recording amplifier 5, is combined with the recording bias from the recording bias oscillator 10, and is sent to the recording head 2. supplied and recorded on magnetic 1-14. The magnetic arp 4 travels in the direction shown by the arrow and is reproduced by the reproduction head 3, and is amplified by the reproduction amplifier 6.
It is led out to the self-generating output terminal 8 via the relay contact RL1b connected as shown by the solid line.
次にある特性の磁気ノ−−ブに対して最適録音バイアス
電流値に設定する場合の動作についで説明゛づる。Next, we will explain the operation when setting the optimum recording bias current value for a magnetic knob with certain characteristics.
先ずこの録音再生装置を図に示されてはいないが周知の
録音再生状態とづ゛るど81で示す録音SWが閉じて発
振電几制御菰1ff11に電源電圧+[うが供給される
。First, although not shown in the figure, this recording and reproducing apparatus is put into a well-known recording and reproducing state.The recording switch indicated by 81 is closed, and the power supply voltage +[ is supplied to the oscillation voltage control unit 1ff11.
次に常開型の起動5W−82を瞬時圧接するとトランジ
スタQ’125 、 Q 126及びトランジスタQ1
33’、 Q134よりなる二つのリレー保持回路が0
NlII3ちリレー1で+−1,rujがONとなり、
各リレーノ接点RL1a−c 、 Ql−2a、 bは
破線で示す側に接続される。D I22 、 D I3
4は逆流電流防止用ダイオードで二つのリレー保持回路
の相々干渉による誤動作を防止している。この時点で磁
気アー1の録音信号は低周波光張器9からの基テ1(信
号(例えば400 Hz或いは1Kl−1z等)に切換
わり前述の如く磁気アープ4に録8された基準信号は再
生ヘッド3で再生され再生アンプ6′c増113されて
リレー接点RL1bを経て整流及び平滑回路14のトラ
ンジスタQ141のベースに印加される。Next, when the normally open type starter 5W-82 is instantaneously pressed, transistors Q'125, Q126 and transistor Q1
33', two relay holding circuits consisting of Q134 are 0
+-1 and ruj are turned on at NlII3, relay 1,
Each relay contact RL1a-c, Ql-2a, b is connected to the side shown by the dashed line. DI22, DI3
4 is a reverse current prevention diode that prevents malfunctions due to mutual interference between the two relay holding circuits. At this point, the recording signal of the magnetic arm 1 is switched to the base 1 (signal (for example, 400 Hz or 1Kl-1z, etc.) from the low frequency optical amplifier 9, and the reference signal 8 recorded on the magnetic arm 4 as described above is The signal is reproduced by the reproducing head 3, amplified by the reproducing amplifier 6'c 113, and applied to the base of the transistor Q141 of the rectifying and smoothing circuit 14 via the relay contact RL1b.
−力制御電圧発生装置12に着目すると、起動5W−8
2の圧接と同時にリレー接点RL1c、RL2aは破線
で示した如くに切換わり、前回使用した磁気テープの特
性を電圧として記憶していたコンデン勺C121は抵抗
R122を通して負電圧電源−Bに接続され、−1−記
の記憶電圧よりさらに負電F[に充電される。この充電
された電圧はFETQ121 、 t−ランジスタQ1
22で構成されるインピーダンス変換回路でインピーダ
ンス変換されてトランジスタQ122の]レクタより導
出されで、イの電圧の1部は1ヘランジスタQ123の
ベースに印加される。さて1−ランジスタ(:)123
0ベースに印加された電圧がツ■−ナダイ剖−ドD12
1のツ丁す7G圧V z121+V rJト123(+
−ランジスタQ123のコレクタ電流を流すのに必要な
ベース−エミッタ間の電圧)になると1〜ランジスクQ
123がON、1−ランジスタQ124もONとなり
トランジスタQ125、Q12Bのリレー保持回路はO
FFとなってリレー1<12はOF Fどなる。これは
第3図で示す×の点に相当する。リレーRL2のOFF
によりRL 2a、 Rl−2bの接点は実線で・示す
如く接続されコンデンサC121は抵抗R121を通し
正電圧電源十Bに接続される。従って負電圧に充電され
ていたコンデンサ0121は強制的に放電し省電[−1
,にiffづく。ここで起動及び停止装置コ3より停止
命令の信号が発せられないときはコンデンサC121の
電圧が零に近づくとトランジスタQ129がOF Fど
なり同峙にトランジスタ0128が6FF、トランジス
タQ127がONとなってリレー保持回路を構成するト
ランジスタQ125 、 Q126が再びON、即ちリ
レーR’L 2がONとなりコンデンサC121は負電
圧に充電されて繰返し波形が得られる。このコンデンサ
C121の充電電圧の変化を第3図の7及びZ′で示す
。前記(V z1’21+ V I3 E 123 )
で近似される二1ンデンザ最大充電電■・を[Cとして
l[Ecl<−[3及び十BとすればコンデンサC12
1の充電電圧の変化はlH’i線となり叉、抵抗1く1
21 = 1< 122とすればその繰返し波形は略゛
−角波、又抵抗R121≠R122とすれば上記波形は
略鋸歯状波となる。又抵抗R121、R122の抵抗値
或いはコンデンサC121の容量を変えることにより上
記繰返し周期即ち周波数を変えることができる。- Focusing on the force control voltage generator 12, starting 5W-8
At the same time as the pressure contact of step 2, the relay contacts RL1c and RL2a are switched as shown by the broken lines, and the capacitor C121, which has stored the characteristics of the magnetic tape used last time as a voltage, is connected to the negative voltage power supply -B through the resistor R122. -1- It is further charged to a negative electric charge F[ than the storage voltage described in -1-. This charged voltage is applied to FETQ121, t-transistor Q1
The voltage is impedance-converted by an impedance conversion circuit composed of transistor Q122, and a part of the voltage is applied to the base of transistor Q123. Now 1-ranjistor (:) 123
The voltage applied to the 0 base is
1st position 7G pressure V z121+V rJto123(+
-The base-emitter voltage required to flow the collector current of transistor Q123) is 1 to Randisk Q
123 is turned on, 1-transistor Q124 is also turned on, and the relay holding circuit of transistors Q125 and Q12B is turned on.
It becomes FF and relay 1<12 goes OFF. This corresponds to the x point shown in FIG. Relay RL2 OFF
Therefore, the contacts of RL 2a and Rl-2b are connected as shown by the solid line, and the capacitor C121 is connected to the positive voltage power supply 1B through the resistor R121. Therefore, capacitor 0121, which had been charged to a negative voltage, is forcibly discharged to save power [-1
, I'd like to know. Here, when the stop command signal is not issued from the start and stop device C3, the voltage of the capacitor C121 approaches zero, and the transistor Q129 turns OFF. At the same time, the transistor 0128 turns 6FF and the transistor Q127 turns ON, and the relay is activated. The transistors Q125 and Q126 constituting the holding circuit are turned on again, that is, the relay R'L2 is turned on, and the capacitor C121 is charged to a negative voltage to obtain a repetitive waveform. Changes in the charging voltage of the capacitor C121 are shown by 7 and Z' in FIG. Said (V z1'21+ V I3 E 123 )
If the maximum charging voltage of the 21 ndenza approximated by [C is l[Ecl
The change in the charging voltage of 1 becomes the lH'i line, and the resistance 1 × 1
If 21 = 1 < 122, the repetitive waveform will be approximately a square wave, and if the resistance R121≠R122, the waveform will be approximately a sawtooth wave. Furthermore, by changing the resistance values of the resistors R121 and R122 or the capacitance of the capacitor C121, the repetition period, that is, the frequency can be changed.
又この繰返し周期fを録音ヘッド2で録音され°ζ再生
ヘッド3で再生されるまでの時間−「に対して、f>’
Tどすれば王による測定誤差を少なくすることができる
。Moreover, this repetition period f is the time from when it is recorded by the recording head 2 to when it is played back by the playback head 3 - "for f>'
Measurement errors due to the error can be reduced by doing this.
次に録音バイアス利発11%器10と発揚電圧制御装置
11に着目すると1−シンジスタQ122の」レクタよ
り導出されたコンデンサC121の電圧は、電圧−イン
ピーダンス変jlA素fどしでのF「]−Q113のグ
ー1〜に印加され、このFET (、)113のドレイ
ン−ソース間のインピーダンスRDS113を変化さぜ
で録音パイ77ス電流を可変させる。Next, paying attention to the recording bias amplifier 11% unit 10 and the boost voltage control device 11, the voltage of the capacitor C121 derived from the 1-rector of the synristor Q122 is F']- The recording bias current is applied by changing the impedance RDS113 between the drain and source of this FET (, )113.
この動作状態を詳述すると録音バイン1ス用発振器10
と発振器L[−制御装置11どは対になつ−(−秤の電
、圧制御型発振器を構成し外乱に対して安定した発振電
、圧即を−)録音バイアス電流を録音ヘッド2へ供給づ
るものぐある。これは、発振電圧をダイオードD101
、0102で整流し、抵抗R111どトIE’l−Q
113のドレイン−ソース間のインピーダンスRDS1
13とぐ分圧しトランジスタQ112のベースに印加し
ツェナダイオードD111’で作られた基準電圧Vz1
11と一1i己[・ランジスタQ112のベースに印加
した電゛圧との比□によりトランジスタQ111のコレ
クター−−Lミッタ間電圧V CE 111を制御し、
録音バイノ7ス用光振器10の供給電vQN圧を可変さ
せて上記録音バイア・ス用発振器10の発振電圧を制御
することにより得られる。ここで[ET Q113のド
レイン−ソース間のインピーダンスRDS113とゲー
ト、印加電圧とは次式の関係が成立づる。To explain this operating state in detail, the recording bass oscillator 10
and the oscillator L [-control device 11 and others form a pair-(-comprise a scale voltage and pressure control type oscillator and provide stable oscillation voltage and pressure against disturbances-) supply recording bias current to the recording head 2. There is a zurumonogaku. This converts the oscillation voltage to diode D101
, 0102, and resistor R111 to IE'l-Q
113 drain-source impedance RDS1
13, the reference voltage Vz1 is applied to the base of the transistor Q112 and created by the Zener diode D111'.
The collector-to-L emitter voltage V CE 111 of the transistor Q111 is controlled by the ratio □ of the voltage applied to the base of the transistor Q112.
This can be obtained by controlling the oscillation voltage of the recording bias oscillator 10 by varying the supply voltage vQN voltage of the recording bias optical oscillator 10. Here, the following relationship holds true between the drain-source impedance RDS113 of the ET Q113, the gate, and the applied voltage.
VaS :ブート印加電圧
Vp ;ピンチA)電圧
gmo ;VGS=OVのときの相互コンダクタンス
従っ−Cコンデン1すC121が負電圧から省電1−1
になりつつあるとぎは上記RD S 113は減少し抵
抗lR111とr?Ds、113どで分圧されたトラン
ジスタ0112のベース印加電圧は減少してトランジス
タQ112のコレクタ電流が減少、トランジスタQ11
1のコレクターエミッタ間の電圧V CE 111も減
少して録音バイアス用発振器10への供給型8Iii電
圧が増加して、録音バイアス電流が増加する。叩ら、コ
ンデンサC121の電L■が負電)1に充電されている
リレーRL2ONのどきは録音バイアス電流は減少し逆
にコンデンサ0121が強制放電されて零電圧になり−
)つある(リレー1<[2がOF F二の)ときは録音
バイアス電流は増加する如く動作する。VaS: Boot applied voltage Vp; Pinch A) Voltage gmo; Mutual conductance when VGS=OV Accordingly -C capacitor 1 C121 saves power from negative voltage 1-1
RD S 113 is reduced and the resistance lR111 and r? The voltage applied to the base of transistor 0112 divided by Ds, 113, etc. decreases, and the collector current of transistor Q112 decreases, causing transistor Q11 to decrease.
The collector-emitter voltage V CE 111 of 1 also decreases, the type 8Iiii voltage supplied to the recording bias oscillator 10 increases, and the recording bias current increases. When the relay RL2 is turned on, the voltage L of capacitor C121 is negatively charged (1), the recording bias current decreases, and conversely, capacitor 0121 is forcibly discharged and becomes zero voltage.
) is present (relay 1<[2 is OFF2), the recording bias current operates to increase.
ここで整流及び平滑回路1/Iとピーク値記憶回路17
と第1の°比較回路18からt象る信号レベル検出装置
15について詳述すると、再生アンプ6からのM埠再・
牛用力信号はリレー接点RL1bを介して整流及び平滑
回路14に印加される。即ち、この整流及び平滑回路1
4は人力信号を]レクタ接地したトランジスタQ141
を介して取出しグイオードl) 141 、 tT)1
42により整流し、コンデンサC141,C142及び
トランジスタQ142に、」、り平滑して取出J。この
トランジスタQ142のIミッタ端より七ノられた信f
3はグイオード[−’) 172を介して第1の比較回
路1Bの一方の入力端であるトランジスターQ’183
のベース1点に印加される。目方、前記トランジスタQ
142のエミッタは減衰器V1で1を介しC接地され、
その摺動端子から得られる信¥′5Vよダイ副−ド1)
171を介しで第1の比較回路18の他方の入力端であ
るi−ランジスタQ182のベース0点とコンデンサC
171に印加される。このダ・イA−ド[)171とコ
ンデン!、LC171は記憶回路17を構成している。Here, the rectification and smoothing circuit 1/I and the peak value storage circuit 17
To explain in detail the signal level detecting device 15 that detects the signals from the first comparator circuit 18 and the first comparator circuit 18,
The cattle power signal is applied to the rectifier and smoothing circuit 14 via relay contact RL1b. That is, this rectification and smoothing circuit 1
4 is a transistor Q141 whose collector is grounded for the human input signal.
Take-out via guide l) 141, tT) 1
42, smoothed and taken out by capacitors C141, C142 and transistor Q142. A signal f applied from the I-mitter terminal of this transistor Q142
3 is connected to the transistor Q'183 which is one input terminal of the first comparator circuit 1B via the guiode [-') 172.
is applied to one base point. The size of the transistor Q
The emitter of 142 is connected to C ground through 1 with attenuator V1,
The signal obtained from the sliding terminal is ¥'5V.
171 to the base 0 point of the i-ransistor Q182, which is the other input terminal of the first comparator circuit 18, and the capacitor C.
171. This Da-I-A-do [)171 and Conden! , LC171 constitute the memory circuit 17.
このようにして1〜ランジスタQ142のTミッタより
取出された波^(d“1出力信号はでのままP点に印加
され、一方減衰器V R1のvF!ilJ端子から前記
1〜ランジスタQ142のiミッタ端よりWtられる出
力レベルより適宜レベルダウンした波高値出力信号を取
出し、記憶回路17に印加りると共に0点に印加する。In this way, the wave ^(d"1 output signal taken out from the T transmitter of transistors 1 to Q142 is applied to point P as it is, and on the other hand, from the vF!ilJ terminal of attenuator V R1 to the T transmitter of transistors 1 to Q142, A peak value output signal whose level is suitably lower than the output level Wt from the i-mitter end is taken out and applied to the memory circuit 17 and to the zero point.
即I)、第3図の0点、1・)点の出力波形に示したよ
うにX点より録音バイノ?スを浅い方から深い方に可変
づるに従っ°Cそれぞれの出力信号は最初設定されたレ
ベルKを保ちながら上昇していくが、ビークバ、イノシ
スを超えると[)点出力は録音バ、イアス磁界によるR
’1磁効果が顕茗となってレベルダウンするが、0点出
力は記憶回路17によりピーク値を記憶し′Cぞの値を
保持しつつ平行移動し′C0点と1)点が交差即ち、両
レベルが−Fiする点に到達する。この交差点が!I!
1Ifl宛γ点即ら、磁気j−1−グ4の最良録?4バ
・イアスt1に 致りるのである。この交差点部I)、
両しベル一致した点では第1の比較回路18のトランジ
スタ(、)182 、 Q183の両コレクタ端電ri
b一致し、両端間にイのベースエミッタを接続されたi
・ランジスタ(1) 181 G;L Or「どなる1
゜又、 ツノ」−配P1−ルベルと抵抗1で201 と
R202J、す113を分圧して111られた0貞にお
iJる3、を卑電圧V20どを第2の比較回路19で比
較し、もし1記再生レベルの力が基tII電j五V20
J、り人であればトランジスタ0191は01” l−
ど1.iる3、これは第3図に示−すYの点に相当する
。I), as shown in the output waveforms of points 0 and 1.) in Figure 3, the recording is made from point X. As the temperature is varied from shallow to deep, the output signal of each °C rises while maintaining the initially set level K, but when it exceeds the beak bar and inosis, the output at point [) becomes the recording bar and the ear magnetic field. by R
'1 The magnetic effect becomes noticeable and the level drops, but the 0 point output stores the peak value in the memory circuit 17 and moves in parallel while maintaining the value of 'C' until the point 'C0 and point 1) intersect. , a point is reached where both levels become -Fi. This intersection! I!
1Ifl to γ point, that is, the best record of magnetic j-1-g4? This brings us to 4th grade t1. This intersection part I),
At the point where both levels match, the voltages at both collector terminals of the transistors (, ) 182 and Q183 of the first comparator circuit 18 are
b matched and connected the base emitter of i between both ends of i
・Ranjisutor (1) 181 G; L Or "Roar 1"
゜Also, the base voltage V20 is compared with 201 and R202J, 113 is divided by 113, and the base voltage V20 is 0. , If the power of the 1st regeneration level is based on tII electric j 5 V20
J, if you are a person, transistor 0191 is 01" l-
1. i3, which corresponds to point Y shown in FIG.
又、起動及び停止1装置ff/ 13内にJ3いU t
−ランジスタQ131のベースには°二゛:)のグー[
・が接続されているa第1のグー1−にtよタイ4−ド
0131を介して制御電It: n 11装Ff 12
内のりレー保I)回路に接続され、第2のグー1− G
、LダイA−ドl’)132庖介して第1の比較回路1
8に18続され、第3のグー1〜はダイオードD133
を介しく第2の比較回路19に接続されており、この1
−うンジスタQ131どこのペースに接続され!ごニ一
つのグーl−からN O0回路を構成しくいる。即1.
)゛、これらの]一つのゲート入力が全てなく<7った
時1ij3めてl−ランジスク0131は01−1−ど
なり、この[−)ンジスク0131に接続された1−′
7ンジスタQ132はAンどなり、この1〜ランジスタ
Q132に接続された!−ノンジスタQ134が01−
1−となり、この結果、リレーr< 11の保1.5回
路はOF FとなってそのリレーRL−1の給電を遮断
し、ぞのリレー、接点RL 1a−cは実線側に接続さ
れる。従−)てリレー接点Rl 10(7)解放1;ヨ
リIンj”、/すC1211よ−LilLリレー1妄点
1−< l−I Cの解放11“I前の電11を保持し
録1′−バ、イl 、、!、本電流1記二Jンゲンリ0
121の電L[に比例した一定電流どなり、本装置Ff
の全動作は完了しく通常の録?”i 111 ’−1状
態ど4jる。。In addition, J3 is included in the start and stop device ff/13.
- The base of transistor Q131 has a goo [°2゛:)
- is connected to the first goo 1- through the tie 0131 to the control voltage It: n 11 unit Ff 12
Inner relay protection I) connected to the circuit, second group 1-G
, the first comparator circuit 1 through the L die A-D l') 132.
8 is connected to 18, and the third group 1~ is a diode D133
is connected to the second comparator circuit 19 via
-Unjista Q131 which pace is connected to! The N00 circuit is constructed from a single goo. Immediately 1.
)゛, When all the gate inputs of one of these] are <7, 1ij3, the l-range disk 0131 becomes 01-1-, and the 1-' connected to this [-)n disk 0131
7 transistor Q132 is connected to this 1 to transistor Q132! -Non register Q134 is 01-
1-, and as a result, the 1.5 circuit with relay r<11 turns OFF and cuts off the power supply to that relay RL-1, and the contacts RL 1a-c of that relay are connected to the solid line side. . Follow-) and relay contact Rl 10 (7) Release 1; 1'-Ba, Il,,! , this current 1, 2, 0
A constant current proportional to the electric current L[ of 121, this device Ff
All operations are complete and normal recording? ``i 111 '-1 state is 4j.
尚、第2の比較回路19は録音パイlメ電流が少ないと
きの磁気j−ブのドロップアウト、レベル変φj」など
の影響により本装置が誤動作するのを防11ツるための
ちのである。又、リレー接点RL2bは録nバイノ7ス
電流が域中L)でいる間、前回使用の磁気ノーノの12
1↑’J: a> Hr己IQを演ムづるための81j
去回路(・ある1゜
又、起動及びR’ +l装置e’:(1、’3内の1・
うンジスタ0134の1ミツタに接紅、されζいる発光
タイ4−ドしに1〕はトランジスタQ134がON即ら
本装置が動伯中点幻しC水装置νiが動作中か古かの人
示りるためのI)のである。The second comparator circuit 19 is provided to prevent the apparatus from malfunctioning due to effects such as dropout of the magnetic j-wave and level change φj when the recording current is low. In addition, relay contact RL2b is connected to the previously used magnetic node 12 while the magnetic current is in the L range.
1↑'J: a> 81j to demonstrate your IQ
exit circuit (・1° also, startup and R' +l device e': (1, 1 in '3)
The light-emitting tie 4-dead which is attached to the 1st part of the Unjistar 0134 has transistor Q134 turned on, so this device appears to be in the middle of the movement, and whether the water device νi is in operation or old This is to show I).
又、抵抗R121、R122の値をアープ速さ切換SW
ど連動しで切換えるJ、・うにし7でJj Glば各l
−プ速さにス=I しても前記同様最適値に;:9定C
さる。In addition, the values of resistors R121 and R122 can be changed to the Arp speed switching SW.
Switch in conjunction with J, sea 7 and Jj, Gl and each l.
- Even if the speed is set to I, the same optimum value as above; : 9 constant C
Monkey.
[本発明の効宋I
Ll 、1 、 述l\/J 如くA Ij 明+7)
装jr1L、l 起動及びf’:’−+1装同1;3
内に一つのグーj−をイ」りるN O0回路をbつでJ
iす、−)のグー 1−人ノノh<全て01” I−に
成って初め−I録?:1う−1に心弁な録音バイアス電
流が決定31″L、記憶される。即ち、り11のゲート
から録音パイj′ス電流が増加方向に変動している竿を
検知し、第2のグー1−より基卑信月の録音iQ /I
−レベルが最大値より規定のレベルまで低ドしたことを
検知し、第3のグー1−より基準信号の録音再生レベル
が規定レベル以上である事を検知するという三つの条件
を同時に充たさない限り停止装置が動作する事はないか
ら、ぞ゛れぞれの最適な録音バ・イアスミ流を得るのに
磁気アープによるドロップアラ[・、レベル変動等にJ
zる誤動作を完全に防止でさる。[Effects of the present invention Song I Ll, 1, Description l\/J Like A Ij Ming+7)
Installation jr1L, l start and f':'-+1 installation 1;3
Insert one goo in the N O0 circuit with b.
isu, -)'s goo 1-personnonoh<all 01'' After becoming I--I record?: 1 U-1, the heart valve recording bias current is determined 31''L and is stored. That is, the rod in which the recording path current is fluctuating in the increasing direction is detected from the gate of ri 11, and the recording of the basic Shingetsu iQ /I
Unless the three conditions of - detecting that the level has fallen below the maximum value to a specified level, and detecting that the recording and playback level of the reference signal is above the specified level from the third point 1 - are met at the same time. Since the stop device never operates, it is necessary to use a magnetic arp to obtain the optimum recording bias flow, and to prevent level fluctuations from occurring.
Completely prevents malfunctions.
又、電圧が直線的に変化する三角波又は鋸歯状波を用い
−て録音バイアス電流を連続可変させ、か゛つ磁気ヘッ
ドで磁気−j−ブに録音された信号が再生ヘッドで再生
されるまでの遅れ時間に対して三角波又は鋸歯状波の周
期を充分大きくとっ(ある為正確な録音バイアス電流を
得る事ができる。さらにアープスピード切換に連動して
三角波又は鋸。In addition, the recording bias current is continuously varied using a triangular or sawtooth wave in which the voltage changes linearly, and the time required for the signal recorded on the magnetic j-beam by the magnetic head to be played back by the playback head is also changed. The cycle of the triangular wave or sawtooth wave is made sufficiently large relative to the delay time (therefore, an accurate recording bias current can be obtained. Furthermore, the period of the triangular wave or sawtooth wave is set sufficiently large for the delay time).
歯状波の周期を変えてやればそれぞれのアープスピード
に応じて必要最小限の時間内で録音バイアス電流を決定
することができる。By changing the period of the toothed wave, the recording bias current can be determined within the minimum necessary time according to each arp speed.
又、磁気アープの録音バイアス電流対出力特性は第2図
に示したようにシャープな特性を持つものや10−゛ド
な特性を持つもの゛管種々あるが、いずれの特性を持つ
磁気′j−ブに対してb本発明になる信13レベル検出
回路11うによって設定したいA−バーバイj7ス点を
減衰器V R1を可変さゼCやる事により自由に正確に
とる小が出来る。Also, as shown in Figure 2, there are various types of magnetic Arp recording bias current vs. output characteristics, including those with sharp characteristics and those with 10-degree characteristics. By varying the attenuator VR1, it is possible to freely and accurately set the A-bar bias point to be set using the signal level detection circuit 11 according to the present invention.
このように、本発明装置により録音再生特性の基本どな
る録r1バイj′スf1i流をいかなる特性の磁気テー
プに対しでも常に一定の基準の最適伯にR9定できるど
艮に自動調整装−が作動中に1記装置が動作中で・ある
ことを表示する表示装置が設り−Cあるので、本発明装
置が設定中なのか否かを容易に判別で3使用者に安心感
を勺えることがでさると共に、各種の磁気テープの特性
を最大限に発揮させることがCきるものである。As described above, with the device of the present invention, the basic recording/reproducing characteristics of the recording r1 bias f1i can always be determined to the optimum ratio of a certain standard for any magnetic tape of any characteristic. During operation, there is a display device that indicates that the device described in item 1 is in operation or not, so it can be easily determined whether the device of the present invention is being set or not, giving the user a sense of security. In addition to this, it is also possible to maximize the characteristics of various magnetic tapes.
第1図は本発明の一実施例を示り回路図、第2図は録音
バ、イアス電流対再生レベル特性、第3図は第1図に示
した回路図の動作説明に供す兆り・イミングヂャ−1・
である。
1.1−・・・ラーブリール、5・・・録音アンプ6・
・・再生〕7ンブ、 7・・・録音入力幅1子8・・・
再生出力端子、 9・・・低周波発振器15・・・信号
レベル検出装置。
特許出願人
パイ副ニア株式会社
@2図
B
第3図Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a recording bar, ear current vs. playback level characteristics, and Fig. 3 is a diagram explaining the operation of the circuit diagram shown in Fig. 1. Imaging gear 1・
It is. 1.1-... Lavreel, 5... Recording amplifier 6.
...Playback] 7 buttons, 7...Recording input width 1 child 8...
Reproduction output terminal, 9...Low frequency oscillator 15...Signal level detection device. Patent Applicant: Paisenia Co., Ltd. @Figure 2B Figure 3
Claims (1)
録音する手段と、この録音された信号を再生づ−る手段
と、この再生された信号のレベルにより上記録音バイア
ス電流の可変を自動的に停止二させて保持する手段とよ
りなる録音バイアスの自動調整装置を備えた磁気録音再
生装置に於いて、上記録音バイアス電偉が可簀動作中に
作動して表示づる表示手段を有することを特徴とする磁
気録音再生装置Recording Bias) A means for recording a signal while varying the bias current, a means for reproducing the recorded signal, and automatically varying the recording bias current according to the level of the reproduced signal. A magnetic recording and reproducing device equipped with an automatic recording bias adjustment device comprising means for stopping and holding the recording bias, characterized in that it has a display means that operates and displays an indication when the recording bias electric field is in a fixed state. Magnetic recording and playback device with
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27918584A JPS60179901A (en) | 1984-12-28 | 1984-12-28 | Magnetic sound recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27918584A JPS60179901A (en) | 1984-12-28 | 1984-12-28 | Magnetic sound recording and reproducing device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7999674A Division JPS5913087B2 (en) | 1974-07-12 | 1974-07-12 | magnetic recording and playback device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60179901A true JPS60179901A (en) | 1985-09-13 |
JPS6122373B2 JPS6122373B2 (en) | 1986-05-31 |
Family
ID=17607622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27918584A Granted JPS60179901A (en) | 1984-12-28 | 1984-12-28 | Magnetic sound recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60179901A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0493209U (en) * | 1990-12-29 | 1992-08-13 | ||
GB2351298A (en) * | 1998-04-27 | 2000-12-27 | Vladyslav Mihailovich Sokolov | Method of alnico alloy melting |
-
1984
- 1984-12-28 JP JP27918584A patent/JPS60179901A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0493209U (en) * | 1990-12-29 | 1992-08-13 | ||
GB2351298A (en) * | 1998-04-27 | 2000-12-27 | Vladyslav Mihailovich Sokolov | Method of alnico alloy melting |
Also Published As
Publication number | Publication date |
---|---|
JPS6122373B2 (en) | 1986-05-31 |
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