JPH0289633U - - Google Patents

Info

Publication number
JPH0289633U
JPH0289633U JP1989113610U JP11361089U JPH0289633U JP H0289633 U JPH0289633 U JP H0289633U JP 1989113610 U JP1989113610 U JP 1989113610U JP 11361089 U JP11361089 U JP 11361089U JP H0289633 U JPH0289633 U JP H0289633U
Authority
JP
Japan
Prior art keywords
transistor
turned
state
rotary transformer
video
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
Application number
JP1989113610U
Other languages
Japanese (ja)
Other versions
JP2543130Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of JPH0289633U publication Critical patent/JPH0289633U/ja
Application granted granted Critical
Publication of JP2543130Y2 publication Critical patent/JP2543130Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図Ａ，Ｂは本考案に係るヘツドドラム組立
体を示した平面図及び部分断面図、第２図は本考
案に係るヘツドドラム回転位相検出装置回路図、
第３図Ａ，Ｂは従来のヘツドドラム組立体を示し
た平面図及び部分断面図、第４図は第１図の位相
検出信号波形図である。 図中、１…上部ドラム、８，９…第１及び第２
ビデオヘツド、１０…永久磁石、１５，１６…ロ
ータリトランス、１７…再生映像信号処理部、１
８…位相検出信号処理部、Ｃ１，Ｃ２…コンデン
サー、Ｒ１，Ｒ１１…抵抗、Ｑ１，Ｑ６…トラン
ジスター、ａ１，ｂ１…一方側端子、ａ２，ｂ２
…他方側端子、ＳＷ１，ＳＷ２…スイツチ、ＰＡ
１，ＰＡ２…前置アンプ、ＲＡ１，ＲＡ２…記録
増幅器。 1A and 1B are a plan view and a partial sectional view showing a head drum assembly according to the present invention, and FIG. 2 is a circuit diagram of a head drum rotational phase detecting device according to the present invention.
3A and 3B are a plan view and a partial sectional view showing a conventional head drum assembly, and FIG. 4 is a waveform diagram of the phase detection signal shown in FIG. 1. In the figure, 1...upper drum, 8, 9...first and second
Video head, 10... Permanent magnet, 15, 16... Rotary transformer, 17... Playback video signal processing section, 1
8... Phase detection signal processing unit, C1, C2... Capacitor, R1, R11... Resistor, Q1, Q6... Transistor, a1, b1... One side terminal, a2, b2
...Other side terminal, SW1, SW2...Switch, PA
1, PA2... preamplifier, RA1, RA2... recording amplifier.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 上部ドラム１に設置された第１ビデオヘツド８
及び第２ビデオヘツド９と、該第１及び第２ビデ
オヘツド８，９の回転方向に対向して設置されて
その第１及び第２ビデオヘツド８，９で正極性の
パルスが出力されるようにする永久磁石１０と、
前記第１ビデオヘツド８に同一の極性に接続され
たロータリトランス１５及び前記第２ビデオヘツ
ド９に反対の極性に接続されたロータリトランス
１６と、前記ロータリトランス１５，１６の２次
巻線一方側端子ａ１，ｂ１に出力される信号を増
幅する前置アンプＰＡ１，ＰＡ２と、該前置アン
プＰＡ１，ＰＡ２の出力信号を夫々選択して位相
検出信号処理部１８及び再生映像信号処理部１７
に印加するスイツチＳＷ１，ＳＷ２と、コンデン
サーＣ１，Ｃ２及び抵抗Ｒ１０，Ｒ１１を夫々通
つて前記ロータリトランス１５，１６の２次巻線
他方側端子ａ２，ｂ２に録画信号を印加する記録
増幅器ＲＡ１，ＲＡ２と、録画状態でヘツドスイ
ツチング信号の電位によりオン／オフされるトラ
ンジスターＱ６と、録画状態で該トランジスター
Ｑ６がオフされる場合にオンになつて前記ロータ
リトランス１５の２次巻線一方側端子ａ１を接地
するトランジスターＱ１と、録画状態で前記トラ
ンジスターＱ６がオフされる場合及び再生状態で
オンになつて前記ロータリトランス１６の２次巻
線他方側端子ｂ２を接地するトランジスターＱ４
と、前記ヘツドスイツチング信号が高電位状態の
場合及び再生状態でオンになつて前記ロータリト
ランス１５の２次巻線他方側端子ａ２を接地する
トランジスターＱ２と、前記ヘツドスイツチング
信号が高電位状態の場合にオンになつて前記ロー
タリトランス１６の２次巻線一方側端子ｂ１を接
地するトランジスターＱ３をオン状態に維持させ
るトランジスターＱ５とにより構成されてなるこ
とを特徴とするビデオヘツドを利用したヘツドド
ラム回転位相検出装置。 A first video head 8 installed on the upper drum 1
and a second video head 9, which are installed opposite to each other in the rotational direction of the first and second video heads 8 and 9, so that pulses of positive polarity are output from the first and second video heads 8 and 9. a permanent magnet 10,
A rotary transformer 15 connected to the first video head 8 with the same polarity, a rotary transformer 16 connected to the second video head 9 with the opposite polarity, and one side of the secondary windings of the rotary transformers 15 and 16. Preamplifiers PA1 and PA2 amplify the signals output to terminals a1 and b1, and output signals of the preamplifiers PA1 and PA2 are selected respectively to select a phase detection signal processing section 18 and a reproduced video signal processing section 17.
recording amplifiers RA1 and RA2 that apply recording signals to the other side terminals a2 and b2 of the secondary windings of the rotary transformers 15 and 16 through capacitors C1 and C2 and resistors R10 and R11, respectively; , a transistor Q6 which is turned on/off by the potential of the head switching signal in the recording state, and a transistor Q6 which is turned on when the transistor Q6 is turned off in the recording state and connects the secondary winding of the rotary transformer 15 to one side terminal a1. a transistor Q1 which grounds the terminal b2 of the secondary winding of the rotary transformer 16 when the transistor Q6 is turned off in the recording state and is turned on in the playback state to ground the other side terminal b2 of the secondary winding of the rotary transformer 16.
and a transistor Q2 which is turned on when the head switching signal is in a high potential state and in a regeneration state to ground the other side terminal a2 of the secondary winding of the rotary transformer 15, and when the head switching signal is in a high potential state. and a transistor Q5 which maintains a transistor Q3 in an on state, which turns on when Rotational phase detection device.
JP1989113610U 1988-09-29 1989-09-29 Head drum rotation phase detection device using video head Expired - Lifetime JP2543130Y2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR15938/1988 1988-09-29
KR2019880015938U KR920006089Y1 (en) 1989-09-07 1989-09-07 Rotational phase detection device using video head

Publications (2)

Publication Number Publication Date
JPH0289633U true JPH0289633U (en) 1990-07-16
JP2543130Y2 JP2543130Y2 (en) 1997-08-06

Family

ID=19279783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989113610U Expired - Lifetime JP2543130Y2 (en) 1988-09-29 1989-09-29 Head drum rotation phase detection device using video head

Country Status (2)

Country Link
JP (1) JP2543130Y2 (en)
KR (1) KR920006089Y1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771506A (en) * 1980-10-22 1982-05-04 Hitachi Ltd Magnetic video recorder and reproducer
JPS629555U (en) * 1985-07-03 1987-01-21
JPS62205557A (en) * 1986-03-06 1987-09-10 Mitsubishi Electric Corp Magnetic recording and reproducing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771506A (en) * 1980-10-22 1982-05-04 Hitachi Ltd Magnetic video recorder and reproducer
JPS629555U (en) * 1985-07-03 1987-01-21
JPS62205557A (en) * 1986-03-06 1987-09-10 Mitsubishi Electric Corp Magnetic recording and reproducing device

Also Published As

Publication number Publication date
JP2543130Y2 (en) 1997-08-06
KR920006089Y1 (en) 1992-08-29
KR900007303U (en) 1990-04-04

Similar Documents

Publication Publication Date Title
JPH0289633U (en)
US5119245A (en) Rotational phase detecting apparatus for head drum utilizing video heads
JP2694038B2 (en) Video signal reproduction circuit
JPS62138341U (en)
JPH01156672U (en)
JPH0215378Y2 (en)
JPH0376202U (en)
JPH0320892Y2 (en)
JPS6324706U (en)
JPS6222704U (en)
JPS6365377U (en)
JPH0166603U (en)
JPS6324732U (en)
JPS61119483U (en)
JPS62183010A (en) Recording and reproducing device
JPS6229646U (en)
JPH0181706U (en)
JPH0270585U (en)
JPH03108103A (en) Recording/reproduction switching circuit
JPS61189402U (en)
JPS61203406U (en)
JPS609003U (en) Integrated circuit for tape recorder
JPH0435202U (en)
JPS6373000U (en)
JPS6149723B2 (en)

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term