KR900006640Y1 - Automatic recording stop circuit of the jcr - Google Patents

Automatic recording stop circuit of the jcr Download PDF

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Publication number
KR900006640Y1
KR900006640Y1 KR2019860019647U KR860019647U KR900006640Y1 KR 900006640 Y1 KR900006640 Y1 KR 900006640Y1 KR 2019860019647 U KR2019860019647 U KR 2019860019647U KR 860019647 U KR860019647 U KR 860019647U KR 900006640 Y1 KR900006640 Y1 KR 900006640Y1
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South Korea
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signal
broadcast signal
output
transistor
broadcast
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KR2019860019647U
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Korean (ko)
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KR880013267U (en
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홍정기
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주식회사 금성사
구자학
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/78Television signal recording using magnetic recording
    • H04N5/782Television signal recording using magnetic recording on tape
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, 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
    • G11B15/02Control of operating function, e.g. switching from recording to reproducing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/04Synchronising
    • H04N5/08Separation of synchronising signals from picture signals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음.No content.

Description

비디오 카세트 레코더의 녹화자동 정지회로Automatic stop circuit of video cassette recorder

첨부된 도면은 본 고안의 자동 정지 회로도이다.The accompanying drawings are the automatic stop circuit diagram of the present invention.

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

1 : 중간주파증폭기 2 : 영상신호처리기1: intermediate frequency amplifier 2: image signal processor

3 : 동기신호분리기 4 : 피크검출기3: sync signal separator 4: peak detector

5 : 방송신호 판별기 6 : 낸드게이트5: broadcast signal discriminator 6: NAND gate

본 고안은 비디오 카세트 레코더에 있어서, 내장되어 있는 튜너로 방송신호를 녹화할 경우에 방송신호가 없거나 또는 방송신호가 종료되면 이를 검출하여 자동으로 녹화를 정지시키게 한 비디오 카세트 레코더의 녹화자동 정지회로에 관한 것이다.The present invention provides a video cassette recorder in which an automatic stop circuit of a video cassette recorder stops recording by automatically detecting a broadcast signal when there is no broadcast signal or when the broadcast signal is terminated. It is about.

종래의 비디오 카세트 레코더는 방송신호의 유무에 관계없이 사용자가 녹화버튼을 누르면 녹화를 하였으므로 사용자가 채널을 잘못 선택하여 방송신호가 없거나 또는 방송신호가 종료될 경우에도 녹화되어 필요없이 테이프가 소모되는 결함이 있었다.In the conventional video cassette recorder, when the user presses the record button regardless of the presence or absence of a broadcast signal, the user records the video. Therefore, when the user selects a wrong channel and there is no broadcast signal or the broadcast signal ends, the video cassette recorder is recorded. There was this.

본 고안은 이와 같은 종래의 결함을 감안하여, 방송 신호에 포함되어 있는 동기신호로 방송신호의 유무를 검출하여 방송신호가 없으면 녹화하지 않게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention, in view of the above-mentioned conventional defects, by detecting the presence of the broadcast signal as a synchronization signal included in the broadcast signal, and devoid not to record without the broadcast signal, which will be described in detail with reference to the accompanying drawings as follows. same.

첨부된 도면에 도시한 바와 같이 중간주파증폭기(1)에서 출력된 영상신호를 처리하는 영상신호처리기(2)와, 상기 영상신호처리기(2)의 출력신호에서 동기신호를 분리하는 동기 신호분리기(3)와, 상기 동기신호분리기(3)에서 출력된 동기신호의 피크(peck)를 검출하는 연산증폭기(OPI) 및 전계효과 트랜지스터(FET1), 다이오드(D1), 저항(R1, R2), 콘덴서(C1)로 된 피크검출기(4)와, 상기 피크검출기(4)의 출력전압을 기준 전압과 비교하여 방송신호의 유무를 판별하는 비교기(COM1) 및 저항(R3-R5)으로 된 방송신호 판별기(5)와, 사용자가 라인의 방송신호를 선택함에 따라 상기 방송신호판별기(5)의 출력신호를 접지시키는 라인선택스위치(SW1)와, 상기 방송신호판별기(5) 및 녹화보드신호단자(RECH)의 녹화모드 신호를 낸드화하여 녹화 제어신호를 출력하는 트랜지스터(TR1-TR3) 및 저항(R6-R9), 다이오드(D2, D3)로 된 낸드게이트(6)로 구성한 것으로, 상기에서 녹화모드 신호단자(RECH)는 사용자가 녹화스위치를 누를 경우에 고전위 신호가 입력되게 하고, 낸드게이트(6)에서 저전위의 녹화제어신호가 출력될 경우에는 방송신호를 녹화하게 하며, 도면의 설명중 미설명 부호 Vcc, Vpp는 전원단자이다.As shown in the accompanying drawings, an image signal processor 2 for processing the image signal output from the intermediate frequency amplifier 1, and a synchronization signal separator for separating the synchronization signal from the output signal of the image signal processor 2 ( 3) and an operational amplifier (OPI), a field effect transistor (FET1), a diode (D1), a resistor (R1, R2), a capacitor for detecting a peak of the synchronization signal output from the synchronization signal separator (3). The peak signal 4 of (C1) and the comparator (COM1) and the resistor (R3-R5) which discriminate the presence or absence of a broadcast signal by comparing the output voltage of the peak detector (4) with a reference voltage are discriminated. 5, a line selection switch SW1 for grounding an output signal of the broadcast signal discriminator 5 as the user selects a broadcast signal of a line, the broadcast signal discriminator 5, and a recording board signal. Transistors (TR1-TR) that NAND the recording mode signal of the terminal (RECH) to output the recording control signal 3) and a NAND gate 6 composed of resistors R6-R9 and diodes D2 and D3, wherein the recording mode signal terminal RECH is inputted with a high potential signal when the user presses the recording switch. When the low-potential recording control signal is output from the NAND gate 6, the broadcast signal is recorded. Unexplained symbols Vcc and Vpp in the drawing are power terminals.

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

저원단자(Vcc)(Vpp)에 전원이 인가되고, 라인선택스위치(SW1)를 개방시키며, 사용자가 녹화스위치를 눌러 녹화모드 신호단자(RECH)로 고전위 신호가 인가된 상태에서 사용자가 선택한 채녈에 방송신호가 있어 중간주파증폭기(1)에서 영상신호가 출력되면, 그 출력된 영상신호는 영상신호처리기(2)에 입력되어 처리되고, 동기신호분리기(3)에 의해 영상신호에 포함되어 있는 동기신호가 분리되어 피크검출기(4)의 연산증폭기(OPI)의 비반전압력단자(+)에 인가되므로 피크검출기(4)는 고전위 신호를 출력하여 방송신호판별기(5)의 비교기(COM1)의 비반전입단자(+)에 입력된다.The power is applied to the low terminal (Vcc) (Vpp), the line selection switch (SW1) is opened, and the user selects the device with the high potential signal applied to the recording mode signal terminal (RECH) by pressing the recording switch. When there is a broadcast signal and the video signal is output from the intermediate frequency amplifier 1, the output video signal is input to the video signal processor 2 for processing, and is included in the video signal by the sync signal separator 3. Since the synchronization signal is separated and applied to the non-voltage terminal (+) of the operational amplifier (OPI) of the peak detector (4), the peak detector (4) outputs a high potential signal to the comparator (COM1) of the broadcast signal discriminator (5). Is input to the non-inverting terminal (+).

이때, 비교기(COM1)의 비반전압력단자(+)에 인가되는 고전위신호가 전원단자(Vcc)의 전원을 저항(R3)(R4)으로 분할하여 비교기(COM1)의 반전입력단자(-)에 인가되는 기준 전압보다 높게 저항(R3, R4)의 값을 설정하면, 비교기(COM1)의 출력단자에는 고전위신호가 출력되어 낸드게 이트(6)의 트랜지스터(TR1)의 에미터에 인가되므로 트랜지스터(TR1)의 에미테에는 로우 고전신호가 인가되어 오프되고, 이에 따라 전원단자(Vcc)의 전원이 저항(R6) 및 트랜지스터(TR1)를 통해 트랜지스터(TR2)의 베이스에 인가되어 그가 온되고, 트랜지스터(TR3)도 온 되므로 낸드게이트(6)의 출력단자인 트랜지스터(TR3)의 콜렉터에 저전위의 기록제어신호가 출력되어 방송신호를 녹화하게 된다.At this time, the high potential signal applied to the non-constant voltage force terminal (+) of the comparator COM1 divides the power supply of the power supply terminal Vcc into the resistors R3 and R4 so that the inverting input terminal of the comparator COM1 is negative. If the values of the resistors R3 and R4 are set higher than the reference voltage applied to the high voltage, the high potential signal is output to the output terminal of the comparator COM1 and applied to the emitter of the transistor TR1 of the NAND gate 6. The low classical signal is applied to the emitter of the transistor TR1 and turned off. Accordingly, the power supply of the power supply terminal Vcc is applied to the base of the transistor TR2 through the resistor R6 and the transistor TR1 and is turned on. Since the transistor TR3 is also turned on, a low potential write control signal is output to the collector of the transistor TR3, which is an output terminal of the NAND gate 6, to record a broadcast signal.

이와 같은 상태에서 방송신호가 종료되거나, 방송신호가 없는 채널로 절환하면, 영상신호처리기(2)에서 출력되는 영상신호가 없어 상기와는 반대로 동기신호분리기(3)가 저전위 신호를 출력하고, 피크검출기(4)는 저전위 신호를 출력하여 비교기(COM1)의 비반전입력단자(+)에 인가되므로 비교기(COM1)의 출력단자에 저전위 신호가 출력되어 트랜지스터(TR1)의 에미터에 인가되고, 이에 따라 트랜지스터(TR1)가 온 되어 트랜지스터(TR2)가 오프되고, 트랜지스터(TR3)도 오프되므로 낸드게이트(6)의 출력단자인 트랜지스터(TR3)의 콜렉터에 고전위 신호가 출력되어 녹화를 정지시키게 된다.When the broadcast signal is terminated in this state, or when switching to a channel without a broadcast signal, there is no video signal output from the video signal processor 2, the synchronous signal separator 3 outputs a low potential signal, in contrast to the above. Since the peak detector 4 outputs a low potential signal and is applied to the non-inverting input terminal (+) of the comparator COM1, a low potential signal is output to the output terminal of the comparator COM1 and applied to the emitter of the transistor TR1. As a result, the transistor TR1 is turned on, the transistor TR2 is turned off, and the transistor TR3 is turned off, so that a high potential signal is outputted to the collector of the transistor TR3, which is an output terminal of the NAND gate 6, to perform recording. Stopped.

그리고, 상기에서 녹화스위치를 누르지 않아 녹화모드 신호단자(RECH)에 저전위 신호가 인가되며, 트랜지스터(TR1)의 에미터에 저전위 신호가 인가되어 온되고, 트랜지스터(TR2)(TR3)는 오프되므로 낸드게이트(6)에서 고전위 신호가 출력되어 녹화하지 않게 되고, 또한 사용자가 라인을 선택하여 라인선택스위치(SW1)를 단락시킬 경우에도 트랜지스터(TR1)가 돈되고, 트랜지스터(TR2)(TR3)는 오프되어 낸드게이트(6)에서 고전위 신호가 출력되므로 녹화하지 않게 된다.The low potential signal is applied to the recording mode signal terminal RECH without pressing the recording switch, the low potential signal is applied to the emitter of the transistor TR1, and the transistors TR2 and TR3 are turned off. Therefore, the high-potential signal is output from the NAND gate 6 so as not to record, and the transistor TR1 is turned on even when the user selects a line and shorts the line select switch SW1, and the transistor TR2 (TR3). ) Is off so that a high potential signal is output from the NAND gate 6 so as not to record.

이상에서 설명한 바와 같이 본 고안은 내장된 튜너를 이용하여 방송신호를 녹화할 경우에 방송신호가 있으면 녹화하고, 없으면 녹화하지 않으므로 필요없이 테이프가 소모되는 것을 방지하는 효과가 있다.As described above, the present invention has an effect of preventing the tape from being consumed without the need for recording the broadcast signal when there is a broadcast signal when the broadcast signal is recorded using the built-in tuner.

Claims (1)

동기신호분리기(3)에서 분리된 방송신호의 동기신호의 피크를 검출하는 피크검출기(4)와, 상기 피크검출기(4)의 출력전압을 기준전압과 비교하여 방송신호의 유무를 판별하는 방송신호판별기(5)와, 상기 방송신호판별기(5)의 출력신호 및 녹화모드신호를 낸드화하여 녹화제어신호를 출력하는 낸드게이트(6)로 구성하여 방송신호가 있을 경우에만 녹화하게 함을 특징으로 하는 비디오 카세트 레코더의 녹화자동 정지회로.A peak detector 4 for detecting peaks of the sync signal of the broadcast signal separated by the sync signal separator 3, and a broadcast signal for determining the presence or absence of a broadcast signal by comparing the output voltage of the peak detector 4 with a reference voltage The discriminator 5 and the NAND gate 6 outputting a recording control signal by NANDizing the output signal and the recording mode signal of the broadcast signal discriminator 5 to record only when there is a broadcast signal. An automatic recording stop circuit for a video cassette recorder.
KR2019860019647U 1986-12-09 1986-12-09 Automatic recording stop circuit of the jcr KR900006640Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860019647U KR900006640Y1 (en) 1986-12-09 1986-12-09 Automatic recording stop circuit of the jcr

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Application Number Priority Date Filing Date Title
KR2019860019647U KR900006640Y1 (en) 1986-12-09 1986-12-09 Automatic recording stop circuit of the jcr

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KR880013267U KR880013267U (en) 1988-08-29
KR900006640Y1 true KR900006640Y1 (en) 1990-07-26

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KR2019860019647U KR900006640Y1 (en) 1986-12-09 1986-12-09 Automatic recording stop circuit of the jcr

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