JPS59106274U

JPS59106274U - video tape recorder

Info

Publication number: JPS59106274U
Application number: JP20102882U
Authority: JP
Inventors: 伊藤　義正; 原田　政次
Original assignee: ソニー株式会社
Priority date: 1982-12-29
Filing date: 1982-12-29
Publication date: 1984-07-17

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

[Brief explanation of drawings]

第１図は従来のビデオテープレコーダのキャプスタン制
御回路の要部ブロック図、第２図は第１図の動作説明用
タイムチャート、第３図は本考案によるビデオテープレ
コーダのサーボ系の一実施例を示すブロック図、第４図
は第３図のノイズレスススチル機能ブロックの詳細を示
す回路図、第５図は第４図の動作説明用タイムチャート
、第６図は第３図の動作説明図である。なお図面に用いられている符号において、２′・・・・
・・マイクロコンピュータ、４・・・・・・スイッチ、
８・・・・・・キャプスタンモータ、１１・・四半安定
マルチバイブレータ、５３ｄ・・・・・・可変抵抗、で
ある。（α）ポーズ４号　　−一丁一一一（Ｊ）Ｃ７Ｌ４鼾％）−−Ｖ− （Ｃ）ヘワｒ切羽【４１号　　−１− Ｃｔ）キイプスタン１７Ｊ＃４一一一一］−−−− １］−一一一一一一一丁一下一一一子一デスト、１Fig. 1 is a block diagram of main parts of a capstan control circuit of a conventional video tape recorder, Fig. 2 is a time chart for explaining the operation of Fig. 1, and Fig. 3 is an implementation of a servo system of a video tape recorder according to the present invention. A block diagram showing an example, Fig. 4 is a circuit diagram showing details of the noiseless still function block in Fig. 3, Fig. 5 is a time chart for explaining the operation of Fig. 4, and Fig. 6 is an explanation of the operation of Fig. 3. It is a diagram. In addition, in the symbols used in the drawings, 2'...
...Microcomputer, 4...Switch,
8...capstan motor, 11...quarter stable multivibrator, 53d...variable resistor. (α) Pause No. 4 - 1111 (J) C7L4 snoring%) --V- (C) Hewa r face [No. 41 -1- Ct) Keypustan 17J #4 1111] --- 1] - 111111cho1ge111ko1desto,1

Claims

[Scope of utility model registration request]

a capstan servo system having an adjusting means for adjusting the phase of the playback control signal and the reference signal so that the playback control signal and the reference signal have a predetermined phase relationship; and a drum rotational phase signal at the time of pause. a first delay means for forming an output of a constant pulse width in synchronization with the output of the first delay means; a second delay means for forming an output of a constant pulse width in synchronization with the trailing edge of the output of the first delay means; switch means for interrupting the servo loop of the capstan motor based on the output of the first delay means, and the output of the second delay means causes the capstan motor to reverse and stop the tape, and the adjustment means A video tape recorder characterized in that the positional relationship between the head and the track at the tape stop position can be adjusted.