JPS61284804A - Sound recording circuit - Google Patents
Sound recording circuitInfo
- Publication number
- JPS61284804A JPS61284804A JP12654085A JP12654085A JPS61284804A JP S61284804 A JPS61284804 A JP S61284804A JP 12654085 A JP12654085 A JP 12654085A JP 12654085 A JP12654085 A JP 12654085A JP S61284804 A JPS61284804 A JP S61284804A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- recording
- signal
- alc
- 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.)
- Pending
Links
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明ハｆ−７’レコーダーのオートレベルコントロー
ル（以下ＡＬＣと省す。）付録前回路に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic level control (hereinafter abbreviated as ALC) circuit for an F-7' recorder.
従来の技術 従来の人ＬＣ付録音回路のブロック図を第２図に示す。Conventional technology A block diagram of a conventional recording circuit with human LC is shown in FIG.
第２図において６はＡＩ、Ｃアンプ、６は整流回路、７
はＡＬＣ駆動回路、８は録音補償アンプである。In Fig. 2, 6 is AI, C amplifier, 6 is rectifier circuit, 7 is
8 is an ALC drive circuit, and 8 is a recording compensation amplifier.
録音信号は、フラットな周波数特性をもつＡＬＣアンプ
６で増幅され、さらに整流回路６で整流されてＡＬＣア
ンプ５の入力端に接続されたムＬＣ駆動回路７に加わる
。このため人ＬＣアンプ５の出力信号にはＡＬＣがかか
る。さらに８で録音補償を行ない録音信号を出力する。The recording signal is amplified by an ALC amplifier 6 having flat frequency characteristics, further rectified by a rectifier circuit 6, and applied to a multi-LC drive circuit 7 connected to the input terminal of the ALC amplifier 5. Therefore, the output signal of the human LC amplifier 5 is subjected to ALC. Furthermore, recording compensation is performed at step 8 and a recording signal is output.
第３図は、簡略化した従来のＡＬＣ付録音回路のブロッ
ク図である。第３図において、９は録音アンプ、１ｏは
整流回路、１１はＡＬＣ駆動回路である。FIG. 3 is a block diagram of a simplified conventional recording circuit with ALC. In FIG. 3, 9 is a recording amplifier, 1o is a rectifier circuit, and 11 is an ALC drive circuit.
録音信号は、９で録音補償され、さらに増幅される。次
に整流回路１ｏで整流されムＬＣ駆動回路１１に加わる
。このため録音アンプ９の出力信号にはＡＬＣがかかる
。The recording signal is subjected to recording compensation at 9 and further amplified. Next, it is rectified by the rectifier circuit 1o and applied to the LC drive circuit 11. Therefore, the output signal of the recording amplifier 9 is subjected to ALC.
発明が解決しようとする問題点
第２図の従来の回路では、ＡＬＣアンプ５と録音補償ア
ンプ８を必要とし、複雑で高価なものとなっていた。第
３図はこの点を改善したものであるが、録音アンプ９で
は、録音補償を行なうため、一般に周波数の高い信号は
、増幅度が大きく、このため周波数の高い信号で、ムＬ
Ｃがかかり、ムＬＣがかかるようなレベルの入力信号で
は、録音補償が働かなくなるという問題を有していた。Problems to be Solved by the Invention The conventional circuit shown in FIG. 2 requires an ALC amplifier 5 and a recording compensation amplifier 8, making it complicated and expensive. Fig. 3 shows an improvement on this point, but since the recording amplifier 9 performs recording compensation, signals with high frequencies are generally amplified to a large degree, and therefore, signals with high frequencies have a high degree of amplification.
There is a problem in that recording compensation does not work for input signals of such a level that C is applied and MLC is applied.
又、周波数の低い信号に対して録音補償している場合も
、同様となる。The same thing applies when recording compensation is performed for a low frequency signal.
本発明は上記問題点に鑑み、簡易な構成で、人ＬＣがか
かるようなレベルの入力信号であっても録音補償された
信号を出力することができるＡＬＣ付録音回路を提供す
るものである。In view of the above problems, the present invention provides a recording circuit with ALC that has a simple configuration and is capable of outputting a recording-compensated signal even if the input signal is at a level that would be applied to a human LC.
問題点を解決するための手段
上記問題点を解決するために本発明の録音回路は、入力
信号を録音補償し、増幅を行なう録音回路の出力端に、
ローパスフィルター回路、又はバンドパスフィルター回
路に接続し、その出力を整流回路に接続し、さらに前記
録音回路の入力端に接続された、ムＬＣ駆動回路に接続
するという構成を備えたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the recording circuit of the present invention includes an output terminal of the recording circuit that performs recording compensation and amplification of the input signal.
It has a configuration in which it is connected to a low-pass filter circuit or a band-pass filter circuit, its output is connected to a rectifier circuit, and further connected to an MLC drive circuit connected to the input end of the recording circuit.
作用
本発明は上記の構成により、録音補償されて、増幅され
た録音信号の出力をローパスフィルター回路又はバンド
パスフィルター回路を通してムＬＣを駆動するため、ム
ＬＣアンプを必要とせず、ムＬＣがかかるようなレベル
の入力信号であっても、録音補償された信号を出力する
ことができる。Effect of the Invention With the above-described configuration, the present invention drives the MULC by passing the output of the amplified recording signal through the low-pass filter circuit or the band-pass filter circuit. Even if the input signal is at such a level, it is possible to output a recording-compensated signal.
実施列
以下本発明の一実施例の録音回路について、図面を参照
しながら説明する。Embodiment Below, a recording circuit according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の録音回路の一実施例を示すものである
。第１図において、１は録音アンプ、２はローパスフィ
ルター回路、３は整流回路、４はムＬＣ駆動回路である
。FIG. 1 shows an embodiment of the recording circuit of the present invention. In FIG. 1, 1 is a recording amplifier, 2 is a low-pass filter circuit, 3 is a rectifier circuit, and 4 is a LC drive circuit.
入力信号は、録音アンプ１において、録音補償のため、
ハイブーストされ、さらに増幅される。The input signal is input to the recording amplifier 1 for recording compensation.
High boosted and further amplified.
この出力信号をローパスフィルター回路２に通し逆にハ
イカットし、はぼ入力信号に近い周波数特性をもった信
号を得る。これを整流回路３で整流し、ムＬ（ｊ駆動回
路４に加えてムＬＣをかける。This output signal is passed through a low-pass filter circuit 2 and is high-cut to obtain a signal with frequency characteristics close to that of the input signal. This is rectified by the rectifier circuit 3, and in addition to the MU L (j drive circuit 4), the MU LC is applied.
従って録音アンプ１の出力信号はムＬＣがかかり、かつ
録音補償され、ハイブーストしたものとなる０
尚この実施列において、録音アンプ１の録音補償でハイ
ブーストとロープ−ストを同時に行なう場合があるが、
その場合は、ローパスフィルター回路２をバンドパスフ
ィルターとすれば良い。Therefore, the output signal of the recording amplifier 1 is subjected to the LC, is subjected to recording compensation, and is high-boosted.In this implementation, the recording compensation of the recording amplifier 1 may perform high-boost and low-boost at the same time. but,
In that case, the low-pass filter circuit 2 may be a band-pass filter.
発明の効果
以上のように本発明は、テープレコーダーにおいて、入
力信号を録音補償して、さらに増幅を行なう録音回路の
出力端に、ローパスフィルター回路又ハバンドパスフィ
ルター回路に接続し、その出力を整流回路に接続し、さ
らに前記録音回路の入力端に接続された、ムＬＣ駆動回
路に接続した録音回路を設けることにより、ムＬＣがか
かシ、かつ録音補償された録音信号を得ることができる
。Effects of the Invention As described above, the present invention provides a tape recorder in which a low-pass filter circuit or a Hubband pass filter circuit is connected to the output end of a recording circuit that performs recording compensation and amplification of an input signal, and the output thereof is By providing a recording circuit connected to the rectifier circuit and further connected to the input terminal of the recording circuit and connected to the LC drive circuit, it is possible to obtain a recording signal in which the LC is switched off and the recording is compensated. can.
第１図は本発明の一実施例の録音回路の回路図、第２図
は従来のＡＬＣ付録音回路のブロック図、第３図は簡略
化した従来のＡＬＣ録音回路のブロック図である。
１・・・・・・録音アンプ、２・・・・・・ローパスフ
ィルター回路、３・・・・・・整流回路、４・・・・・
・ムＬＣ駆動回路。FIG. 1 is a circuit diagram of a recording circuit according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional recording circuit with ALC, and FIG. 3 is a simplified block diagram of a conventional ALC recording circuit. 1... Recording amplifier, 2... Low pass filter circuit, 3... Rectifier circuit, 4...
・MULC drive circuit.
Claims (1)
らに増幅を行なう録音回路の出力端に、ローパスフィル
ター回路又はバンドパスフィルター回路を接続し、その
出力を整流回路に接続し、さらに前記録音回路の入力端
に接続されたオートレベルコントロール駆動回路に接続
してレベル制御がかかり、かつ録音補償された録音信号
を得るようにした録音回路。In a tape recorder, a low-pass filter circuit or a band-pass filter circuit is connected to the output terminal of a recording circuit that performs recording compensation and further amplification of an input signal, the output of which is connected to a rectifier circuit, and the input terminal of the recording circuit A recording circuit that is connected to an auto level control drive circuit connected to the 1000A to obtain a level-controlled and recording signal that has been compensated for recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12654085A JPS61284804A (en) | 1985-06-11 | 1985-06-11 | Sound recording circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12654085A JPS61284804A (en) | 1985-06-11 | 1985-06-11 | Sound recording circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61284804A true JPS61284804A (en) | 1986-12-15 |
Family
ID=14937715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12654085A Pending JPS61284804A (en) | 1985-06-11 | 1985-06-11 | Sound recording circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61284804A (en) |
-
1985
- 1985-06-11 JP JP12654085A patent/JPS61284804A/en active Pending
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