JPS62133202U - - Google Patents
Info
- Publication number
- JPS62133202U JPS62133202U JP2234086U JP2234086U JPS62133202U JP S62133202 U JPS62133202 U JP S62133202U JP 2234086 U JP2234086 U JP 2234086U JP 2234086 U JP2234086 U JP 2234086U JP S62133202 U JPS62133202 U JP S62133202U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switching
- output
- rotating magnetic
- magnetic heads
- 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
- 230000005236 sound signal Effects 0.000 claims 3
- 230000004069 differentiation Effects 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は第１図の動作説明に供する信号波形図、第３
図は第１図のスイツチングノイズ除去回路の要部
の詳細回路図、第４図は従来例のブロツク図、第
５図は従来例の動作説明に供する信号波形図であ
る。
１，２……第１、第２回転磁気ヘツド、３……
磁気テープ、１３……スイツチングノイズ除去回
路、１３ａ，１３ｂ……第１、第２スイツチング
ノイズ除去回路、１８，１９，２９，３０……第
３〜第６復調回路、２０，３１……第１、第２比
較回路、２１……ゲート信号形成回路、２２，３
２……第１、第２アナログスイツチ、２３，３３
……第１、第２微分回路。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a signal waveform diagram for explaining the operation of Figure 1,
1. FIG. 4 is a block diagram of a conventional example, and FIG. 5 is a signal waveform diagram for explaining the operation of the conventional example. 1, 2...first and second rotating magnetic heads, 3...
Magnetic tape, 13... Switching noise removal circuit, 13a, 13b... First and second switching noise removal circuits, 18, 19, 29, 30... Third to sixth demodulation circuits, 20, 31... First and second comparison circuits, 21... gate signal forming circuit, 22, 3
2...First and second analog switches, 23, 33
...First and second differential circuits.
Claims (1)
転磁気ヘツドによつて磁気テープに記録し、再生
時には前記両回転磁気ヘツドからの再生出力をヘ
ツドスイツチングパルスによつて交互に切換えて
音声信号に復調する磁気記録再生装置におけるス
イツチングノイズ除去回路において、 前記各回転磁気ヘツドからの再生出力をそれぞ
れ復調する復調回路と、 各回転磁気ヘツドに対応する前記復調回路の各
出力のレベルをそれぞれ比較して対応する比較出
力を与える比較回路と、 前記ヘツドスイツチングパルスに基づいて、両
回転磁気ヘツドからの再生出力の前記切換えに同
期したゲート信号を形成出力するゲート信号形成
回路と、 前記比較回路からの比較出力を前記ゲート信号
が与えられたときに出力するゲート回路と、 このゲート回路からの前記比較出力を微分する
微分回路と、 この微分回路の出力と前記交互に切換えて復調
された音声信号とを混合する混合回路とを備える
ことを特徴とする磁気記録再生装置におけるスイ
ツチングノイズ除去回路。[Claims for Utility Model Registration] An FM-modulated audio signal is recorded on a magnetic tape by at least two rotating magnetic heads, and during playback, the playback outputs from both of the rotating magnetic heads are alternated by head switching pulses. A switching noise removal circuit in a magnetic recording and reproducing device that demodulates a signal into an audio signal by switching to a demodulation circuit that demodulates the playback output from each of the rotating magnetic heads, and each output of the demodulation circuit that corresponds to each of the rotating magnetic heads. and a gate signal forming circuit that forms and outputs a gate signal synchronized with the switching of the reproduction output from both rotating magnetic heads based on the head switching pulse. a gate circuit that outputs the comparison output from the comparison circuit when the gate signal is applied; a differentiation circuit that differentiates the comparison output from the gate circuit; and an output of the differentiation circuit and the switching circuit. 1. A switching noise removal circuit in a magnetic recording/reproducing device, comprising: a mixing circuit for mixing demodulated audio signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2234086U JPH0626961Y2 (en) | 1986-02-18 | 1986-02-18 | Switching noise elimination circuit in magnetic recording / reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2234086U JPH0626961Y2 (en) | 1986-02-18 | 1986-02-18 | Switching noise elimination circuit in magnetic recording / reproducing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62133202U true JPS62133202U (en) | 1987-08-22 |
| JPH0626961Y2 JPH0626961Y2 (en) | 1994-07-20 |
Family
ID=30819632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2234086U Expired - Lifetime JPH0626961Y2 (en) | 1986-02-18 | 1986-02-18 | Switching noise elimination circuit in magnetic recording / reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626961Y2 (en) |
-
1986
- 1986-02-18 JP JP2234086U patent/JPH0626961Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0626961Y2 (en) | 1994-07-20 |
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