JPS6133231U - Head switching signal generation circuit - Google Patents
Head switching signal generation circuitInfo
- Publication number
- JPS6133231U JPS6133231U JP11545184U JP11545184U JPS6133231U JP S6133231 U JPS6133231 U JP S6133231U JP 11545184 U JP11545184 U JP 11545184U JP 11545184 U JP11545184 U JP 11545184U JP S6133231 U JPS6133231 U JP S6133231U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- head switching
- switching signal
- generation circuit
- signal generation
- 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
【図面の簡単な説明】
第１図は本考案一実施例の回路ブロック図、第２図は波
形図である。
第３図は第２の実施例の回路ブロック図、第４区は第２
の実施例における波形図である。
第５図は従来例の回路ブ冶ツク図である。
１０・・・ＰＣ信号検出ヘッド、１２・・・フリップフ
ロツプ、１４・・・垂直同期信号分離回路、１５・・・
位相比較回路、１６・・・遅延回路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit block diagram of an embodiment of the present invention, and FIG. 2 is a waveform diagram. Figure 3 is a circuit block diagram of the second embodiment, and the fourth section is the second
FIG. 3 is a waveform diagram in an example of FIG. FIG. 5 is a circuit block diagram of a conventional example. 10... PC signal detection head, 12... flip-flop, 14... vertical synchronization signal separation circuit, 15...
Phase comparison circuit, 16...delay circuit.
Claims (1)
段と、再生映像信号より垂直同期信号を分離する手段と
、前記回転位相信号と前記垂直同期信号との位相を比較
する位相比較回路と、該位相比較回路出力により遅延時
間が実質的に制御される遅延回路とを備え、該遅延回路
に前記回転位相信号を入力して、前記遅延回路出力をヘ
ッド切換信号とするヘッド切換信号作成回路。means for generating a rotational phase detection signal preceding the rotational phase of the head; means for separating a vertical synchronization signal from a reproduced video signal; a phase comparison circuit for comparing the phases of the rotational phase signal and the vertical synchronization signal; A head switching signal generation circuit comprising a delay circuit whose delay time is substantially controlled by an output of a phase comparison circuit, the rotational phase signal being input to the delay circuit, and the output of the delay circuit being used as a head switching signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545184U JPS6133231U (en) | 1984-07-27 | 1984-07-27 | Head switching signal generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11545184U JPS6133231U (en) | 1984-07-27 | 1984-07-27 | Head switching signal generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6133231U true JPS6133231U (en) | 1986-02-28 |
Family
ID=30674421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11545184U Pending JPS6133231U (en) | 1984-07-27 | 1984-07-27 | Head switching signal generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6133231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02288781A (en) * | 1989-04-28 | 1990-11-28 | Victor Co Of Japan Ltd | Helical scan type magnetic reproducing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593505A (en) * | 1978-12-29 | 1980-07-16 | Sony Corp | Head switching signal generation circuit of vtr |
-
1984
- 1984-07-27 JP JP11545184U patent/JPS6133231U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593505A (en) * | 1978-12-29 | 1980-07-16 | Sony Corp | Head switching signal generation circuit of vtr |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02288781A (en) * | 1989-04-28 | 1990-11-28 | Victor Co Of Japan Ltd | Helical scan type magnetic reproducing device |
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