JPS60173172U - Noise removal circuit - Google Patents
Noise removal circuitInfo
- Publication number
- JPS60173172U JPS60173172U JP5874384U JP5874384U JPS60173172U JP S60173172 U JPS60173172 U JP S60173172U JP 5874384 U JP5874384 U JP 5874384U JP 5874384 U JP5874384 U JP 5874384U JP S60173172 U JPS60173172 U JP S60173172U
- Authority
- JP
- Japan
- Prior art keywords
- audio signal
- hold
- output
- circuit
- hold circuit
- 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
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案−実施例の回路ブロック図、第２図はそ
の一部の具体例を示す回路ブロック図である。
１５・・・切換スイッチ、２１・・佳］ツブアウト検出
回路、１８・・・ＦＭ復調回路、２２・・・第１のホー
ルド回路、２３・・・ローパスフィルタ、２４・・・第
２のホールド回路、２０・・・第１ホールドパルス作成
手段。FIG. 1 is a circuit block diagram of an embodiment of the present invention, and FIG. 2 is a circuit block diagram showing a specific example of a part thereof. DESCRIPTION OF SYMBOLS 15... Changeover switch, 21... Bubble out detection circuit, 18... FM demodulation circuit, 22... First hold circuit, 23... Low pass filter, 24... Second hold circuit , 20 . . . first hold pulse generation means.
Claims (1)
た磁気記録媒体より複数の回転ヘッドによって前記ＦＭ
変調された音声信号を再生する磁気記録再生装置のノイ
ズ除去回路において、前記複数の回転ヘッドの回転位相
に関連した切換信号の作成手段と、該切換信号に基づき
前記複数の回転ヘッドからの再生ＦＭ音声信号を連続化
するスイッチング手段と、前記スイッチング手段出力で
ある連続化された再生ＦＭ音声信号を復調する復調手段
と、該復調手段出力を入力とする第１のホールド回路と
、前記切換信号に基づき第１のホールドパルスを作成し
て、前記第１のホールド回路に供給する第１ホールドパ
ルス作成手段と、前記第１のホールド回路出力を入力と
するローパスフィルタと、該ローパスフィルタ出力を入
力とする第２のホールド回路と、前記再生ＦＭ音声信号
のドロップアウトを検出して前記第２のホールド回路を
制御するドロップアウト検出手段とを備えることを特徴
とするノイズ除去回路。The FM modulated audio signal is recorded on a magnetic recording medium by a plurality of rotary heads.
In a noise removal circuit of a magnetic recording and reproducing device that reproduces a modulated audio signal, a means for creating a switching signal related to the rotational phase of the plurality of rotary heads, and a reproduction FM from the plurality of rotary heads based on the switching signal. a switching means for making the audio signal continuous; a demodulating means for demodulating the continuous reproduced FM audio signal which is the output of the switching means; a first hold circuit receiving the output of the demodulating means; a first hold pulse creating means that creates a first hold pulse based on the first hold pulse and supplies the first hold pulse to the first hold circuit; a low pass filter that receives the output of the first hold circuit as an input; and a low pass filter that receives the output of the low pass filter as an input. 1. A noise removal circuit comprising: a second hold circuit for detecting dropout of the reproduced FM audio signal; and dropout detection means for detecting dropout of the reproduced FM audio signal and controlling the second hold circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5874384U JPS60173172U (en) | 1984-04-20 | 1984-04-20 | Noise removal circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5874384U JPS60173172U (en) | 1984-04-20 | 1984-04-20 | Noise removal circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60173172U true JPS60173172U (en) | 1985-11-16 |
| JPH0325346Y2 JPH0325346Y2 (en) | 1991-05-31 |
Family
ID=30584534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5874384U Granted JPS60173172U (en) | 1984-04-20 | 1984-04-20 | Noise removal circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60173172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200361A (en) * | 1987-02-13 | 1988-08-18 | Sanyo Electric Co Ltd | Noise eliminating circuit |
-
1984
- 1984-04-20 JP JP5874384U patent/JPS60173172U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63200361A (en) * | 1987-02-13 | 1988-08-18 | Sanyo Electric Co Ltd | Noise eliminating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0325346Y2 (en) | 1991-05-31 |
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