JPH01154560U - - Google Patents
Info
- Publication number
- JPH01154560U JPH01154560U JP4813088U JP4813088U JPH01154560U JP H01154560 U JPH01154560 U JP H01154560U JP 4813088 U JP4813088 U JP 4813088U JP 4813088 U JP4813088 U JP 4813088U JP H01154560 U JPH01154560 U JP H01154560U
- Authority
- JP
- Japan
- Prior art keywords
- analog switches
- switching
- noise reduction
- rotary heads
- reduction 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.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案一実施例を示すブロツク図、第
２図は波形図、第３図はスイツチングパルス作成
のための構成を示すブロツク図、第４図は第３図
に係る波形図、第５図は従来例を示す図である。
２，３…回転ヘツド、６，７…アナログスイツ
チ、８…ＦＭ復調回路、２０…スイツチングパル
ス作成手段。
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a waveform diagram, FIG. 3 is a block diagram showing the configuration for creating switching pulses, FIG. 4 is a waveform diagram according to FIG. 3, FIG. 5 is a diagram showing a conventional example. 2, 3... Rotating head, 6, 7... Analog switch, 8... FM demodulation circuit, 20... Switching pulse generation means.
Claims (1)
録してなる記録媒体から複数の回転ヘツドを用い
てＦＭ音声信号を再生して１つのチヤンネルにス
イツチングにより合成して復調する装置のスイツ
チングノイズ軽減回路において、前記複数の回転
ヘツドに対応した複数のアナログスイツチと、順
次切換制御される前記アナログスイツチのオン期
間がオーバーラツプする様に前記アナログスイツ
チを制御する複数のスイツチングパルスを作成す
る作成手段と、前記複数のアナログスイツチから
の合成された再生ＦＭ音声信号を入力とする復調
回路を備えることを特徴とするスイツチングノイ
ズ軽減回路。 A switching noise reduction circuit for a device that uses a plurality of rotary heads to reproduce FM audio signals from a recording medium recorded by FM modulating a predetermined carrier signal with an audio signal, and synthesizes and demodulates the signals into one channel by switching. a plurality of analog switches corresponding to the plurality of rotary heads, and a generation means for generating a plurality of switching pulses for controlling the analog switches so that on-periods of the analog switches, which are sequentially switched and controlled, overlap; A switching noise reduction circuit comprising a demodulation circuit which inputs the synthesized reproduced FM audio signals from the plurality of analog switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4813088U JPH01154560U (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4813088U JPH01154560U (en) | 1988-04-08 | 1988-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01154560U true JPH01154560U (en) | 1989-10-24 |
Family
ID=31274295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4813088U Pending JPH01154560U (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01154560U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57166788A (en) * | 1981-03-20 | 1982-10-14 | Licentia Gmbh | Video recorder for storing and/or reproducing video carrier wave frequency modulated by video signal |
-
1988
- 1988-04-08 JP JP4813088U patent/JPH01154560U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57166788A (en) * | 1981-03-20 | 1982-10-14 | Licentia Gmbh | Video recorder for storing and/or reproducing video carrier wave frequency modulated by video signal |
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