KR900005919Y1 - Nrzi modulating circuit of digital audio tape recorder - Google Patents

Nrzi modulating circuit of digital audio tape recorder Download PDF

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Publication number
KR900005919Y1
KR900005919Y1 KR2019870017015U KR870017015U KR900005919Y1 KR 900005919 Y1 KR900005919 Y1 KR 900005919Y1 KR 2019870017015 U KR2019870017015 U KR 2019870017015U KR 870017015 U KR870017015 U KR 870017015U KR 900005919 Y1 KR900005919 Y1 KR 900005919Y1
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KR
South Korea
Prior art keywords
terminal
signal
digital audio
tape recorder
flip
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KR2019870017015U
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Korean (ko)
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KR890007582U (en
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박정온
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주식회사 금성사
최근선
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Priority to KR2019870017015U priority Critical patent/KR900005919Y1/en
Publication of KR890007582U publication Critical patent/KR890007582U/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • 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
    • G11B15/1808—Driving of both record carrier and head

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

내용 없음.No content.

Description

디지탈 오디오 테이프 레코오더의 NRZI변조회로NRZI modulation circuit of digital audio tape recorder

제1도는 본 고안의 디지탈 오디오 테이프 레코오더의 NRZI변조로도.1 is an NRZI modulation of the digital audio tape recorder of the present invention.

제2도는 제1도의 각부의 파형도.2 is a waveform diagram of each part of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 헤드구동회로 MM1: 모노멀티1: Head drive circuit MM 1 : Mono multi

FF1: 플립플롭 VR1: 가변저항FF 1 : Flip-flop VR 1 : Variable resistor

AD1: 앤드게이트 C1: 콘덴서AD 1 : end gate C 1 : condenser

CH1: 헤드CH 1 : head

본 고안은 데이타신호인 디지탈신호를 자기테이프에 기록시킬 경우에 NRZI(Non-Returen to Zero Inverted : NRZI)변조 즉, 입력데이타 신호중 고전위에서만 자화반전시켜 자기 테이프에 디지탈 신호가 정확하게 기록되게한 디지탈 오디오 테이프 레코오더 NRZI변조로에 관한 것이다.In the present invention, when digital signals, which are data signals, are recorded on magnetic tape, Non-Returen to Zero Inverted (NRZI) modulation, that is, magnetization inversion only at high potential among input data signals, enables digital signals to be accurately recorded on magnetic tape. Audio tape recorder NRZI modulator.

일반적으로 디지탈 오디오 테이프 레코오더의 자기 테이프에 데이타 신호인 디지탈 신호를 기록함에 있어서, 디지탈 신호가 고전위 상태를 계속 유지하거나 또는 저전위 상태가 인접되어 있을 경우에 자기 테이프의 자화특성에 의하여 디지탈 신호가 자기 테이프에 정확하게 기록되지 않을 뿐아니라 기록 파형폭이 일정치 않을 경우 시간적으로 불균일한 기록이 되어 재생시에는 동일 그룹에 속하지 않았던 신호라도 동일그룹의 신호로써 검출되어 에러를 발생시키는 스규 현상이 발생되는 등의 그 동작이 안정되지 못하여 제품의 신뢰성이 결여 되는등 여러가지 결함이 있었다.In general, in recording a digital signal as a data signal on a magnetic tape of a digital audio tape recorder, when the digital signal maintains a high potential state or a low potential state is adjacent, Is not recorded on the magnetic tape correctly, and if the recording waveform width is not constant, the recording becomes irregular in time, and even when the signal does not belong to the same group at the time of playback, a rule that generates an error is detected as a signal of the same group. There are various defects, such as unstable operation of the lamp and lack of reliability of the product.

본 고안은 이와같은 종래의 결함을 감안하여 간단한 회로의 구성으로 데이타 신호인 디지탈신호를 자기테이프에 기록할 경우 NRZI변조하여 정확하게 기록할 수 있게 안출한 것으로 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention has been made in order to accurately record the digital signal, which is a data signal on a magnetic tape, by accurately recording the NRZI modulation in consideration of such a conventional defect. same.

제1도에 도시한 바와같이 데이타신호 및 클럭입력단(DS)(CKS)를 앤드게이트(AD1)를 통해 가변저항(VR1) 및 콘덴서(C1)가 접속된 모노멀티(MM1)의 입력단자(I1)에 접속하여 출력단자(In)를 클리어 단자(CLR1)에 클리어신호(CLS)가 입력되는 플리플롭(FF1)의 클럭단자(CK1)에 접속하고, 플립플롭(FF1)의 입력단자(J1)(K1)에는 전원단자(Vcc)를 공통접속하여 그의 출력단자(Q1)를 헤드 구동회로(1)를 통해 헤드(CH1)에 접속하여 구성한 것이다.As shown in FIG. 1, the data signal and the clock input terminal DS CKS are connected to the monolith MM 1 to which the variable resistor VR 1 and the capacitor C 1 are connected through the AND gate AD 1 . Connect to the input terminal I 1 , connect the output terminal I n to the clock terminal CK 1 of the flip-flop FF 1 to which the clear signal CLS is input to the clear terminal CLR 1 , and flip-flop. is constituted by through its output terminal (Q 1) and a common access to a power supply terminal (Vcc) to the head driver circuit (1) connected to the head (CH 1) an input terminal (J 1) (K 1) of (FF 1) will be.

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

전원단자(Vcc)에 전원이 인가되고, 제2도의 (가)에 도시한 바와같은 클리어신호(CLS) 파형이 플립플롭(FF1)의 클리어단자(CLR1)에 인가되며, 그 인가된 신호에 의해 플립플롭(FF1)은 클리어 되어 출력단자(Q1)로 저전위가 출력된다.The power is applied to the power supply terminal Vcc, and the clear signal CLS waveform as shown in FIG. 2A is applied to the clear terminal CLR 1 of the flip-flop FF 1 , and the applied signal. The flip-flop FF 1 is cleared, and a low potential is output to the output terminal Q 1 .

이와같은 상태에서 데이타신호 및 클럭입력단자(DS)(CKS)에 제2도의 (나) 및 (다)에 도시한 바와같은 신호의 파형이 입력될 경우에 그 입력된 신호의 파형은 앤드게이트(AD1)를 통해 제2도의 (라)에 도시한 바와같이 앤드화되어 출력되고, 그 출력된 신호는 모노멀티(MM1)의 입력단자(I1)에 입력되어 가변저항(VR1) 및 콘덴서(C1)이 시정수에 의해 그의 출력단자(I0)로 제2도의 (마)에 도시한 바와같이 일정한 가변폭의 파형신호가 출력되고, 그 출력된 신호의 파형은 플립플롭(FF1)의 클럭단자(CK1)에 인가되고, 이때 플립플롭(FF1)의 입력단자(J1)(K1)에 모두 고전위가 고정인가되어 있으므로 플립플롭(FF1)은 토글되어 그의 출력단자(Q1)로 고전위에서 자화반전이 발생된 제2도의 (바)에 도시한 바와같은 신호의 파형이 출력되고, 그 출력된 신호의 파형은 헤드구동회로(1) 및 헤드(CH1)를 통해 테이프 상에 기록된다.In this state, when the waveform of the signal as shown in (b) and (c) of FIG. 2 is input to the data signal and the clock input terminal DS (CKS), the waveform of the input signal is an AND gate ( Through AD 1 ), it is ANDed and output as shown in (D) of FIG. 2, and the output signal is inputted to the input terminal I 1 of the mono multi (MM 1 ) so that the variable resistor VR 1 and The capacitor C 1 outputs a waveform signal having a constant variable width as shown in FIG. 2E by the time constant to its output terminal I 0 , and the waveform of the output signal is flip-flop (FF). is applied to the clock terminal (CK 1) of the 1), wherein the flip-flop (input terminal of the FF 1) (J 1) (because all of the K 1) is applied above the fixed classical flip-flop (FF 1) is a toggle his the output waveform of the signal shown in (Q 1) classical magnetic transition is a second-degree generating (f) above to be output, the waveform of the output signal Through the head driving circuit (1) and the head (CH 1) is recorded on the tape.

이상에서 설명한 바와같이 본 고안은 디지탈 시놓를 NRZI변조 즉, 입력데이타신호의 고전위에서만 자화반전을 시켜 자기기록 테이프에 기록시키게 됨으로써 스큐현상에 의한 에러를 최소로 하여 디지탈 신호를 테이프에 정확하게 기록할 수 있음은 물론, 고밀도 기록에 적합한 회로도로서, 그 회로구성이 간단하여 원가절감의 효과는 물론 회로의 동작이 안정하여 제품에 대한 신뢰성을 부여하는 이점도 있다.As described above, the present invention records the digital signal on the tape by minimizing the error caused by the skew phenomenon by recording on the magnetic recording tape by reversing the magnetization only at the high potential of the input data signal. As well as being a circuit diagram suitable for high-density recording, the circuit configuration is simple, so that the effect of cost reduction and stable operation of the circuit can be provided to provide reliability to the product.

Claims (1)

헤드(CH1)로 자기테이프에 데이타신호를 기록시킴에 있어서, 데이타신호 및 클럭입력단자(DS)(CKS)를 앤드게이트(AD1)를 통해 가변저항(VR1) 및 콘덴서(C1)가 접속된 모노멀티(MM1)의 입력단자(I1)에 접속하고, 모노멀티(MM1)의 출력단자(IO)는 클리어단자(CLR1)에 클리어신호(CLS)가 인가되는 플립플롭(FF1)의 클럭단자(CK1)에 접속하여 그의 입력단자(J1)(K1)에는 전원단자(Vcc)를 공통접속하며, 플립플롭(FF1)의 출력단자(Q1)는 헤드구동회로(1)를 통해 헤드(CH1)에 접속하여 구성함을 특징으로하는 디지탈 오디오 테이프 레코오더의 NRZI변조회로.Head (CH 1) of a magnetic in Sikkim writing data signals on a tape, a data signal and a clock input terminal (DS) variable resistance to (CKS) via the AND gate (AD 1) (VR 1) and a capacitor (C 1) connected to the input terminal (I 1) of the mono-multi (MM 1) connected to an output terminal (I O) of the mono-multi (MM 1) the flip to which the clear signal (CLS) in the clear terminal (CLR 1) It connects to the clock terminal (CK 1) of the flops (FF 1), and is commonly connected to the power supply terminal (Vcc) its input terminal (J 1) (K 1) , an output terminal (Q 1) of the flip-flop (FF 1) Is a NRZI modulation circuit for a digital audio tape recorder, characterized in that it is connected to the head (CH 1 ) via a head drive circuit (1).
KR2019870017015U 1987-09-30 1987-09-30 Nrzi modulating circuit of digital audio tape recorder KR900005919Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870017015U KR900005919Y1 (en) 1987-09-30 1987-09-30 Nrzi modulating circuit of digital audio tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870017015U KR900005919Y1 (en) 1987-09-30 1987-09-30 Nrzi modulating circuit of digital audio tape recorder

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KR890007582U KR890007582U (en) 1989-05-17
KR900005919Y1 true KR900005919Y1 (en) 1990-06-30

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KR2019870017015U KR900005919Y1 (en) 1987-09-30 1987-09-30 Nrzi modulating circuit of digital audio tape recorder

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KR890007582U (en) 1989-05-17

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