JPS5984939U - Noise reduction circuit for magnetic recording and reproducing devices - Google Patents
Noise reduction circuit for magnetic recording and reproducing devicesInfo
- Publication number
- JPS5984939U JPS5984939U JP17858882U JP17858882U JPS5984939U JP S5984939 U JPS5984939 U JP S5984939U JP 17858882 U JP17858882 U JP 17858882U JP 17858882 U JP17858882 U JP 17858882U JP S5984939 U JPS5984939 U JP S5984939U
- Authority
- JP
- Japan
- Prior art keywords
- noise reduction
- magnetic recording
- reduction circuit
- level
- reproducing devices
- 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
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の雑音低減回路の一例の記録時の周波数特
性図、第２図は本考案雑音低減回路の一実施例のブロッ
ク系統図、第３図は第２図示の回路の記録時の周波数特
性図である。
１・・・入力端子、２，７・・・コンパンダ、３・・・
バッファ、４．８・・・演算増幅器、５・・・可変イン
ピーダンス回路、６．１１・・・制御回路、９・・・可
変高域フィルタ、１０・・・高域ブイルタ、１２・・・
出力端子、８１〜ミ１０・・・スイッチ。□Figure 1 is a frequency characteristic diagram of an example of a conventional noise reduction circuit during recording, Figure 2 is a block diagram of an embodiment of the noise reduction circuit of the present invention, and Figure 3 is a diagram of the circuit shown in Figure 2 during recording. It is a frequency characteristic diagram. 1...Input terminal, 2,7...Compander, 3...
Buffer, 4.8... Operational amplifier, 5... Variable impedance circuit, 6.11... Control circuit, 9... Variable high-pass filter, 10... High-pass filter, 12...
Output terminal, 81 to Mi10... switch. □
Claims (1)
ベルに応じてレベルの圧縮又は伸張を行なう第１のコン
パンダと、供給される信号をその中・高域について該中
・高域の信号のレベルに応じてレベルの圧縮又は伸張を
行なう第２のコンパンダとを互いに縦続接続してなり、
記録時に入来する信号を該第１及び第２のコンパンダで
圧縮し、再生時に再生された信号を該第１及び第２のコ
ンパンダで伸張するよう構成してなる磁気記録再生装置
の雑音低減回路。A first compander compresses or expands the level of the supplied signal over the entire band according to the level of the supplied signal; A second compander that compresses or expands the level according to the level is connected in cascade with each other,
A noise reduction circuit for a magnetic recording/reproducing device, which is configured to compress an incoming signal during recording using the first and second companders, and expand the reproduced signal during playback using the first and second companders. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17858882U JPS5984939U (en) | 1982-11-26 | 1982-11-26 | Noise reduction circuit for magnetic recording and reproducing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17858882U JPS5984939U (en) | 1982-11-26 | 1982-11-26 | Noise reduction circuit for magnetic recording and reproducing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5984939U true JPS5984939U (en) | 1984-06-08 |
Family
ID=30387694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17858882U Pending JPS5984939U (en) | 1982-11-26 | 1982-11-26 | Noise reduction circuit for magnetic recording and reproducing devices |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5984939U (en) |
-
1982
- 1982-11-26 JP JP17858882U patent/JPS5984939U/en active Pending
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