JPH0166603U - - Google Patents
Info
- Publication number
- JPH0166603U JPH0166603U JP1987162966U JP16296687U JPH0166603U JP H0166603 U JPH0166603 U JP H0166603U JP 1987162966 U JP1987162966 U JP 1987162966U JP 16296687 U JP16296687 U JP 16296687U JP H0166603 U JPH0166603 U JP H0166603U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- amplification
- detection
- magnetic head
- 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
- 230000003321 amplification Effects 0.000 claims 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims 5
- 238000001514 detection method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の一実施例である２ヘツドヘリ
カルスキヤンニング方式のＶＴＲのブロツク図、
第２図は従来例の２ヘツドヘリカルスキヤンニン
グ方式のＶＴＲのブロツク図である。
２，２２……低域通過フイルタ（ＬＰＦ）、３
……帯域通過フイルタ（ＢＰＦ）、４……記録輝
度信号処理回路、６……混合器、７……記録色信
号処理回路、９……システムコントロール回路、
１０……記録増幅器、１１，１６ａ，１６ｂ，３
０，３２，３３ａ，３３ｂ……記録再生切り換え
スイツチ、１２ａ，１２ｂ……ロータリートラン
ス、１３ａ，１３ｂ……磁気ヘツド、１５ａ，１
５ｂ……抵抗、１８……切り換えスイツチ、１９
……タイミング信号発生器、２０……再生増幅器
、２１……高域通過フイルタ（ＨＰＦ）、２５…
…再生輝度信号処理回路、２６……混合器、２７
……再生色信号処理回路、３１……可変利得増幅
器、３５……レベル検出器。
FIG. 1 is a block diagram of a two-head helical scanning VTR, which is an embodiment of the present invention.
FIG. 2 is a block diagram of a conventional two-head helical scanning type VTR. 2, 22...Low pass filter (LPF), 3
... band pass filter (BPF), 4 ... recording luminance signal processing circuit, 6 ... mixer, 7 ... recording color signal processing circuit, 9 ... system control circuit,
10...recording amplifier, 11, 16a, 16b, 3
0, 32, 33a, 33b...Record/reproduction switch, 12a, 12b...Rotary transformer, 13a, 13b...Magnetic head, 15a, 1
5b... Resistor, 18... Changeover switch, 19
...Timing signal generator, 20...Regenerative amplifier, 21...High pass filter (HPF), 25...
... Reproduction luminance signal processing circuit, 26 ... Mixer, 27
... Reproduction color signal processing circuit, 31 ... Variable gain amplifier, 35 ... Level detector.
Claims (1)
に記録する磁気記録装置において、 上記信号を可変の増幅利得で増幅し上記磁気ヘ
ツドに出力する増幅手段と、 上記磁気ヘツドに記録される信号のレベルを検
出し上記信号のレベルに比例する検出信号を出力
する検出手段と、 上記検出手段から出力される検出信号に応答し
て上記磁気ヘツドに記録される信号のレベルが一
定になるように上記増幅手段の増幅利得を制御す
る制御手段とを備えたことを特徴とする磁気記録
装置。[Claims for Utility Model Registration] A magnetic recording device that records a predetermined signal on a magnetic recording medium using a magnetic head, comprising: amplifying means for amplifying the signal with a variable amplification gain and outputting the amplified signal to the magnetic head; a detection means for detecting the level of a signal recorded on the head and outputting a detection signal proportional to the level of the signal; and a level of the signal recorded on the magnetic head in response to the detection signal output from the detection means. and control means for controlling the amplification gain of the amplification means so that the amplification gain of the amplification means is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162966U JPH0166603U (en) | 1987-10-22 | 1987-10-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987162966U JPH0166603U (en) | 1987-10-22 | 1987-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0166603U true JPH0166603U (en) | 1989-04-28 |
Family
ID=31447269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987162966U Pending JPH0166603U (en) | 1987-10-22 | 1987-10-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0166603U (en) |
-
1987
- 1987-10-22 JP JP1987162966U patent/JPH0166603U/ja active Pending
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