JPS59143173U - Head switching circuit - Google Patents
Head switching circuitInfo
- Publication number
- JPS59143173U JPS59143173U JP3573283U JP3573283U JPS59143173U JP S59143173 U JPS59143173 U JP S59143173U JP 3573283 U JP3573283 U JP 3573283U JP 3573283 U JP3573283 U JP 3573283U JP S59143173 U JPS59143173 U JP S59143173U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- head switching
- switching circuit
- output
- playback
- 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
- Television Signal Processing For Recording (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図は超小型ＶＴＲのシリンダの模式図、第２図は超
小型ＶＴＲに用いられるヘッドの模式図、第３図及び第
４図は夫々、超小型ＶＴＲに用いられる記録系及び再生
系のブロック図、第５図は本考案の一実施例におけるヘ
ッド切換回路のブロック図、第６図は第５図の要部波形
図である。
主な図番の説明、９．１１・・・第３及び第４スイッチ
回路、１４・・・ドロップアウト補償回路、１６・・・
電圧比較回路、ＡＮＤ ｌ〜ＡＮＤ ３・・・第１〜第
３アンドゲート、ＯＲ・・・オアゲート、ＦＦ１・・・
Ｔフリップフロップ、ＦＦ２・・・Ｄフリップフロップ
。
（イ】
（ｌす
（ニ）
−−−−（ホ）−−−
一旧一」−一止−」−
」−−−−−ニー一一一
１−ニー一一一一
＝Fig. 1 is a schematic diagram of a cylinder of an ultra-compact VTR, Fig. 2 is a schematic diagram of a head used in an ultra-compact VTR, and Figures 3 and 4 respectively show the recording system and playback system used in an ultra-compact VTR. FIG. 5 is a block diagram of a head switching circuit in an embodiment of the present invention, and FIG. 6 is a waveform diagram of the main part of FIG. 5. Explanation of main figure numbers, 9.11...Third and fourth switch circuit, 14...Dropout compensation circuit, 16...
Voltage comparison circuit, AND l to AND 3...first to third AND gate, OR...OR gate, FF1...
T flip-flop, FF2...D flip-flop. (i) (lsu(d)
−−−−(E)−−− One old one”−One stop−”−”−−−−Nee 1111−Nee 1111=
Claims (1)
記再生出力を１水平期間遅延する回路と、ドロカニニッ
トを歌詩、前記再生出力に代えて前記１水平期間遅延回
路出力を出力するスイッチ回路とから成るドロップアウ
ト補償回路を有する磁気記録再生装置において、特殊再
生時、前記ドロップアウト、第５図は上記よりヘッド切
換信号を作成する回路を設け、該ヘッド切換信号作成回
路出力によりヘッド出力を切換えることを特徴とするヘ
ッド切換回路。A circuit for detecting a dropout in the playback output, a circuit for delaying the playback output by one horizontal period, and a switch circuit for outputting the output of the one horizontal period delay circuit in place of the playback output. A magnetic recording and reproducing apparatus having an out compensation circuit is characterized in that during special playback, a circuit for creating a head switching signal from the dropout shown in FIG. head switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3573283U JPS59143173U (en) | 1983-03-11 | 1983-03-11 | Head switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3573283U JPS59143173U (en) | 1983-03-11 | 1983-03-11 | Head switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59143173U true JPS59143173U (en) | 1984-09-25 |
Family
ID=30166418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3573283U Pending JPS59143173U (en) | 1983-03-11 | 1983-03-11 | Head switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59143173U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4836723B1 (en) * | 1968-10-28 | 1973-11-07 |
-
1983
- 1983-03-11 JP JP3573283U patent/JPS59143173U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4836723B1 (en) * | 1968-10-28 | 1973-11-07 |
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