JPH0125125B2 - - Google Patents
Info
- Publication number
- JPH0125125B2 JPH0125125B2 JP57092451A JP9245182A JPH0125125B2 JP H0125125 B2 JPH0125125 B2 JP H0125125B2 JP 57092451 A JP57092451 A JP 57092451A JP 9245182 A JP9245182 A JP 9245182A JP H0125125 B2 JPH0125125 B2 JP H0125125B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- bias
- recorded
- signal
- circuits
- 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
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- 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
Description
【発明の詳細な説明】
この発明は、テープレコーダにおける自動録音
バイアス調整装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic recording bias adjustment device for a tape recorder.
従来、この種のバイアス調整装置では、磁気記
録媒体、即ち磁気テープの種類に応じてバイアス
量を自動的に調整するのが普通であり、録音すべ
き信号の周波数成分に応じて録音バイアス量を調
整するものはなかつた。一方、テープレコーダで
は録音バイアス量を多くすると、歪が少くなり、
中域及び低域における飽和レベルは増加するが、
高域における録・再レベルが減少して飽和レベル
は小さくなる。 Conventionally, this type of bias adjustment device normally automatically adjusts the bias amount according to the type of magnetic recording medium, that is, the magnetic tape, and the recording bias amount is adjusted according to the frequency component of the signal to be recorded. There was nothing to adjust. On the other hand, with tape recorders, increasing the amount of recording bias reduces distortion.
The saturation level in the midrange and low range increases, but
The recording/playback level in the high range decreases and the saturation level becomes smaller.
従つて、録音すべき信号の高域成分が比較的多
いときには録音バイアス量を少めとし、また高域
成分が比較的少い場合には録音バイアス量を多く
することが望ましい。 Therefore, when the signal to be recorded has a relatively large amount of high-frequency components, it is desirable to set the recording bias amount to a small value, and when the high-frequency component of the signal to be recorded is relatively small, it is desirable to increase the recording bias amount.
この発明は、上記のように録音すべき信号の周
波数成分に応じて録音バイアス量を自動的に調整
することができるものである。 According to the present invention, the amount of recording bias can be automatically adjusted according to the frequency component of the signal to be recorded as described above.
以下、この発明の一実施例を図について説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
図において、１は入力端子であり録音すべき信
号が入力される。この入力信号は録音レベル可変
用の抵抗器VRを通つて、ラインアンプ２、ドル
ビーアンプ３及び録音アンプ４を経て磁気ヘツド
５により磁気テープ６に録音される。７はマイク
ロプロセツサであり、自動録音バイアス調整用の
操作により、上記アンプ２の入力を図示していな
い基準発振器側に切換える。この発振器からの入
力は、1KHz及び10KHz等の互いに異なる周波数
の信号よりなり、これらの信号はアンプ２，３，
４及び磁気ヘツド５を経て磁気テープ６に録音さ
れる。この録音された信号は図示していない再生
ヘツドで再生され、該ヘツドで再生された上記
1KHzの成分と10KHzの成分とのレベルが互いに
等しくなるように、マイクロプロセツサ７による
バイアス制御回路８によつて録音バイアス量が調
整される。 In the figure, 1 is an input terminal to which a signal to be recorded is input. This input signal passes through a recording level variable resistor VR, a line amplifier 2, a Dolby amplifier 3, and a recording amplifier 4, and is recorded onto a magnetic tape 6 by a magnetic head 5. A microprocessor 7 switches the input of the amplifier 2 to a reference oscillator (not shown) by an automatic recording bias adjustment operation. The input from this oscillator consists of signals of different frequencies such as 1KHz and 10KHz, and these signals are sent to amplifiers 2, 3,
4 and a magnetic head 5 before being recorded onto a magnetic tape 6. This recorded signal is played back by a playback head (not shown), and the above-mentioned signal played by the head is
The recording bias amount is adjusted by the bias control circuit 8 by the microprocessor 7 so that the levels of the 1 KHz component and the 10 KHz component are equal to each other.
上記のようなバイアスの自動調整装置は周知の
ものであり、詳しい説明は省略する。 The automatic bias adjustment device as described above is well known, and detailed explanation thereof will be omitted.
符号９は録音アンプ４の録音等価回路であり、
回路Ｃ，Ｄ，Ｅにより構成されている。これらの
回路Ｃ，Ｄ，Ｅは第２図C′，D′，E′にそれぞれ示
す録音等価特性を有し、スイツチSW1を手動によ
り操作してトランジスタQ1，Q2，Q3のいずれか
をオンにすることにより、このオンになつたトラ
ンジスタの接続された等価回路が動作状態にな
る。 Reference numeral 9 is a recording equivalent circuit of the recording amplifier 4,
It is composed of circuits C, D, and E. These circuits C, D, and E have recording equivalent characteristics shown in Fig. 2 C', D', and E', respectively, and switch SW1 is manually operated to select which transistor Q1 , Q2 , or Q3. By turning on a transistor, the equivalent circuit connected to the transistor that has been turned on becomes operational.
上記の装置において、例えば回路Ｅを動作させ
た状態で前記したように1KHzと10KHzの再生レ
ベルが等しくなるように録音バイアスを調整する
と、録音バイアスは多めになり、中低域の信号の
録音に適したバイアスになる。また回路Ｃを動作
させた状態で前記バイアス調整をすると、録音バ
イアスは少めとなるので、高域の信号の録音に適
したバイアスになる。 In the above device, for example, if you adjust the recording bias so that the playback levels of 1KHz and 10KHz are equal as described above with circuit E in operation, the recording bias will become too large, making it difficult to record mid-low frequency signals. Become a suitable bias. Furthermore, if the bias adjustment is performed while the circuit C is in operation, the recording bias will be a little smaller, so the bias will be suitable for recording high-frequency signals.
この録音バイアスの調整後に、マイクロプロセ
ツサ７によつてアンプ２の入力を前記基準発振器
に代えて抵抗器VRを経た信号に切換えることに
より、録音すべき信号の周波数成分に応じた適当
なバイアスでの録音が可能になる。 After adjusting the recording bias, the microprocessor 7 switches the input of the amplifier 2 to a signal that has passed through the resistor VR instead of the reference oscillator, thereby adjusting the bias appropriately according to the frequency component of the signal to be recorded. recording becomes possible.
第１図はこの発明の一実施例を示すブロツクダ
イアグラム、第２図は第１図の録音等価回路の特
性を示すグラフである。
４……録音アンプ、９……録音等価回路。
FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a graph showing the characteristics of the recording equivalent circuit of FIG. 1. 4...Recording amplifier, 9...Recording equivalent circuit.
Claims (1)
を所定の録音増幅器を介して録音してこれを再生
し、この再生された信号のレベルが上記の互いに
異なる周波数において略々等しくなるように上記
録音のバイアス量を自動的に調整するものにおい
て、上記録音増幅器の等価回路として録音等価特
性の異なる複数の回路を用意し、これらの回路の
一つを録音すべき信号の周波数帯域に応じて選択
した状態で上記のように録音バイアスを自動的に
調整するようにしたことを特徴とするテープレコ
ーダにおける自動録音バイアス調整装置。1. Signals of different frequencies from a reference oscillator are recorded through a predetermined recording amplifier and reproduced, and the recording is biased so that the levels of the reproduced signals are approximately equal at the different frequencies. In the device that automatically adjusts the amount, multiple circuits with different recording equivalent characteristics are prepared as equivalent circuits of the recording amplifier described above, and one of these circuits is selected according to the frequency band of the signal to be recorded. An automatic recording bias adjustment device for a tape recorder, characterized in that the recording bias is automatically adjusted as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245182A JPS58208909A (en) | 1982-05-31 | 1982-05-31 | Automatic sound recording bias adjusting device of tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245182A JPS58208909A (en) | 1982-05-31 | 1982-05-31 | Automatic sound recording bias adjusting device of tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58208909A JPS58208909A (en) | 1983-12-05 |
| JPH0125125B2 true JPH0125125B2 (en) | 1989-05-16 |
Family
ID=14054761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9245182A Granted JPS58208909A (en) | 1982-05-31 | 1982-05-31 | Automatic sound recording bias adjusting device of tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58208909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998015541A1 (en) * | 1996-10-09 | 1998-04-16 | EGIS Gyógyszergyár Rt. | Novel isoxazol derivatives, pharmaceutical compositions containing the same, and a process for the preparation of the novel compounds |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5914902Y2 (en) * | 1978-02-02 | 1984-05-02 | 松下電器産業株式会社 | Tape recorder bias adjustment display device |
-
1982
- 1982-05-31 JP JP9245182A patent/JPS58208909A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998015541A1 (en) * | 1996-10-09 | 1998-04-16 | EGIS Gyógyszergyár Rt. | Novel isoxazol derivatives, pharmaceutical compositions containing the same, and a process for the preparation of the novel compounds |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58208909A (en) | 1983-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4210942A (en) | Video signal play-back circuit | |
| US4227048A (en) | Audio signal transmission circuit having a constant level tone-controlled output signal | |
| JPH0125125B2 (en) | ||
| JP2687298B2 (en) | Recording equipment | |
| JPH04246905A (en) | Reproducer | |
| US3153702A (en) | Volume compensated stereophonic phonograph | |
| JPH0624045Y2 (en) | Magnetic tape recorder | |
| JPH0422406Y2 (en) | ||
| JPS6224325Y2 (en) | ||
| JPS6125072Y2 (en) | ||
| JP3170810B2 (en) | Magnetic recording / reproducing device | |
| JPS6325524Y2 (en) | ||
| KR890002048Y1 (en) | Frequency selecting circuit | |
| JPS6020199Y2 (en) | tape recorder | |
| KR910002115Y1 (en) | Recording/revival common use audio circuits of digital audio tape recorder | |
| JPS6224323Y2 (en) | ||
| JPS6130357Y2 (en) | ||
| JPS5935870Y2 (en) | Recording level adjustment circuit | |
| JPS6321242B2 (en) | ||
| KR910004666Y1 (en) | Audio signal control circuit for vtr | |
| KR940006720Y1 (en) | Device for editing external voice | |
| JPS5914120A (en) | Magnetic sound recording and reproducing device | |
| JPH056249B2 (en) | ||
| JPH0736205B2 (en) | Tape recorder | |
| JPS5931767B2 (en) | Head-type magnetic recording and reproducing device for both recording and reproducing purposes |