KR930018515A - Head switching control circuit - Google Patents

Head switching control circuit Download PDF

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Publication number
KR930018515A
KR930018515A KR1019920002691A KR920002691A KR930018515A KR 930018515 A KR930018515 A KR 930018515A KR 1019920002691 A KR1019920002691 A KR 1019920002691A KR 920002691 A KR920002691 A KR 920002691A KR 930018515 A KR930018515 A KR 930018515A
Authority
KR
South Korea
Prior art keywords
signal
head switching
inputting
switching control
output signal
Prior art date
Application number
KR1019920002691A
Other languages
Korean (ko)
Other versions
KR0183667B1 (en
Inventor
박규열
이도수
Original Assignee
강진구
삼성전자 주식회사
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 by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019920002691A priority Critical patent/KR0183667B1/en
Publication of KR930018515A publication Critical patent/KR930018515A/en
Application granted granted Critical
Publication of KR0183667B1 publication Critical patent/KR0183667B1/en

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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

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  • Television Signal Processing For Recording (AREA)

Abstract

VTR(Video Tape Recorder)에 있어서 헤드스위칭제어회로에 관한 것으로 특히, 고밀도 기록을 위해 드럼속도를 높혔을 시 헤드스위칭제어회로에 관한 것이다. 드럼모타로부터 FG의 신호를 입력하고 PG의 신호를 리세트단에 입력하여 헤드스위칭펄스의 타이밍을 출력하는 카운터와, 카운터의 출력신호 및 수평동기신호를 입력하여 헤드스위칭 펄스시간을 검출하는 검출수단과, 검출수단의 출력신호 및 임의의 주파수를 가진 클럭신호를 입력하여 헤드스위칭 제어신호를 발생하는 제어수단으로 구성된다. 따라서 고밀도 기록시 테이프상의 2트랙 또는 3트랙을 1필드로 할 경우 1필드기간내에 발생하는 헤드스위칭제어신호를 수평귀션소거기간에 발생하여 수직귀선소거 기간이 아닌 기간에서 헤드스위칭이 발생될 때 생기는 스위칭노이즈를 없앨 수 있는 이점이 있다.The present invention relates to a head switching control circuit in a video tape recorder (VTR), and more particularly to a head switching control circuit when a drum speed is increased for high density recording. A counter for inputting the FG signal from the drum motor and the PG signal to the reset stage to output the timing of the head switching pulse, and a detecting means for inputting the counter output signal and the horizontal synchronization signal to detect the head switching pulse time. And control means for inputting an output signal of the detecting means and a clock signal having an arbitrary frequency to generate a head switching control signal. Therefore, when 2 tracks or 3 tracks on the tape are used in high density recording, the head switching control signal generated within one field period is generated during the horizontal exclusion period, and the head switching occurs during the period other than the vertical blanking period. This has the advantage of eliminating switching noise.

Description

헤드 스위칭 제어회로Head switching control circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 헤드스위칭 펄스 발생기의 블럭도, 제2도는 본 발명에 의한 실시예인 헤드스위칭 펄스 발생기의 회로도, 제3도는 제2도에 도시된 헤드스위칭 펄스발생기 회로도의 파형도.1 is a block diagram of a head switching pulse generator according to the present invention, FIG. 2 is a circuit diagram of a head switching pulse generator according to an embodiment of the present invention, and FIG. 3 is a waveform diagram of a head switching pulse generator circuit diagram shown in FIG.

Claims (3)

VTR에 있어서, 드럼모타(110)로 부터FG(111)의 신호를 입력하고 PG(112)의 신호를 리세트단에 입력하여 헤드스위칭펄스의 타이밍을 출력하는 카운터(210)와, 상기 카운터(210)의 출력신호 및 수평동기신호를 입력하여 헤드 스위칭 펄스시간을 검출하는 검출수단(200)과, 상기 검출수단(200)의 출력신호 및 임의의 주파수를 가진 클럭신호를 입력하여 헤드스위칭 제어신호를 발생하는 제어수단(300)으로 구성됨을 특징으로 하는 헤드스위칭 제어회로.In the VTR, a counter 210 for inputting a signal of the FG 111 from the drum motor 110 and a signal of the PG 112 to the reset terminal to output the timing of the head switching pulse, and the counter ( A detection means 200 for detecting a head switching pulse time by inputting an output signal and a horizontal synchronous signal of 210 and a head switching control signal by inputting an output signal of the detection means 200 and a clock signal having an arbitrary frequency. Head switching control circuit, characterized in that consisting of a control means for generating a 300. 제1항에 있어서, 검출수단(200)는 상기 카운터(210)의 출력신호를 입력하여 라이징(rising) 에지(edge)에 동기되어 작동하는 제1단안정멀티 바이브레이터(211)와, 상기 카운터(210)의 출력신호를 입력하여 폴링(falling) 에지(edge)에 동기되어 작동하는 제2단안정멀티바이브레이터(212)와, 상기 제2단안정멀티바이브레이터(212)의 출력신호를 입력신호로 하고 수평동기신호를 클럭단에 클럭신호를 입력하는 제1플립플롭(213)으로 구성됨을 특징으로 하는 헤드스위칭제어회로.The method of claim 1, wherein the detection means 200 is input to the output signal of the counter 210, the first single-stable multi-vibrator 211 to operate in synchronization with the rising edge (edge) and the counter ( The output signal of the second single-stable multivibrator 212 and the second single-stable multivibrator 212, which operate in synchronization with a falling edge by inputting the output signal of 210, are input signals. And a first flip-flop (213) for inputting a horizontal synchronous signal to a clock signal at a clock stage. 제1항에 있어서, 제어수단(300)은 상기 제1단안정멀티바이브레이터의 출력신호는 J입력단에 입력된 상기 제1플립플롭(213)의 출력신호를 K입력단에 입력하고 임의의 주파수를 가진 클럭펄스를 클럭단에 입력하는 J/K플립플롭으로 구성됨을 특징으로 하는 헤드스위칭제어회로.2. The control unit 300 inputs an output signal of the first flip-flop 213 input to the J input terminal to the K input terminal and outputs an arbitrary frequency. A head switching control circuit comprising a J / K flip flop for inputting a clock pulse to a clock stage. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920002691A 1992-02-21 1992-02-21 Head switching control circuit KR0183667B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920002691A KR0183667B1 (en) 1992-02-21 1992-02-21 Head switching control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920002691A KR0183667B1 (en) 1992-02-21 1992-02-21 Head switching control circuit

Publications (2)

Publication Number Publication Date
KR930018515A true KR930018515A (en) 1993-09-22
KR0183667B1 KR0183667B1 (en) 1999-04-15

Family

ID=19329337

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920002691A KR0183667B1 (en) 1992-02-21 1992-02-21 Head switching control circuit

Country Status (1)

Country Link
KR (1) KR0183667B1 (en)

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Publication number Publication date
KR0183667B1 (en) 1999-04-15

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