KR940003918Y1 - Reproducing signal surpressing circuit of vcr for tv mode - Google Patents
Reproducing signal surpressing circuit of vcr for tv mode Download PDFInfo
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- KR940003918Y1 KR940003918Y1 KR2019880018880U KR880018880U KR940003918Y1 KR 940003918 Y1 KR940003918 Y1 KR 940003918Y1 KR 2019880018880 U KR2019880018880 U KR 2019880018880U KR 880018880 U KR880018880 U KR 880018880U KR 940003918 Y1 KR940003918 Y1 KR 940003918Y1
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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
- G11B20/10009—Improvement or modification of read or write signals
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
Abstract
내용 없음.No content.
Description
본 고안은 모드 선택에 의해 방송신호 또는 재생신호를 출력하는 브이 씨 알에 관한 것으로, 특히 텔레비젼 모드시 RF변환기에 입력되는 재생신호를 억제하여 양질의 화면을 제공하기 위한 브이 씨 알의 텔레비젼 모드시 재생신호 억제회로에 관한 것이다.The present invention relates to a V seed that outputs a broadcast signal or a playback signal by mode selection. In particular, the present invention relates to a V seed TV mode for providing a high quality screen by suppressing a play signal input to an RF converter in a television mode. A reproduction signal suppression circuit is provided.
통상적인 브이 씨 알에 있어서는, 텔레비젼 모드시 RF변환기에 의해 방송신호가 선택되어 영상처리기로 출력되었다.In a typical V seed, a broadcast signal is selected by an RF converter in a television mode and outputted to an image processor.
그러나 상기와 같이 방송신호가 출력될때 재생신호가 RF변환기에 입력되어 방송신호와 간섭현상이 발생하여 화질이 좋지 않게 되는 결점이 있었다.However, as described above, when a broadcast signal is output, a reproduction signal is input to an RF converter, which causes interference with the broadcast signal, resulting in poor image quality.
본 고안은 이러한 결점을 해결하기 위하여 브이씨알의 텔레비젼 모드시 RF변환기로 입력되는 재생신호의 레벨을 최소화시켜 양질의 방송신호를 얻을 수 있도록 하는 브이 씨 알의 텔레비젼모드시 재생신호 억제회로를 안출한 것으로, 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.In order to solve this drawback, the present invention devised a signal suppression circuit in V-TV mode to minimize the level of the playback signal input to the RF converter in the TV mode. When described in detail by the accompanying drawings as follows.
제1도는 본 고안 브이 씨 알의 텔레비젼모드시 재생신호 억제회로도로서, 이에 도시한 바와같이 모드제어단자(CT)로 부터 출력되는 제어신호에 따라 RF변환기(5)로 전원(Va)(Vb)을 각기 스위칭하는 제1, 제2스위칭부(1)(2)와, 텔레비젼모드시 상기 제2스위칭부(2)가 오프됨에 따라 상기 RF변화기(5)의 영상신호입력단자(Vi)와 음성 신호입력단자(Ai)로 입력되는 영상신호와 음성신호를 각기 차단하는 영상신호용 버퍼(3) 및 음성신호용 버퍼(4)로 구성하는 것으로, 텔리비젼모드시 상기 모드제어단자(CT)로 부터 저전위신호가 출력되고 재생모드시에는 고전위신호가 출력된다.1 is a circuit diagram of a reproduction signal suppression in a television mode of the present invention. As shown in FIG. 1, a power supply Va (Vb) is supplied to an RF converter 5 according to a control signal output from a mode control terminal CT. The first and second switching units 1 and 2 for respectively switching the video signal input terminal Vi and the audio of the RF transducer 5 as the second switching unit 2 is turned off in the television mode. It consists of a video signal buffer (3) and an audio signal buffer (4) which respectively block the video signal and the audio signal input to the signal input terminal (Ai), and low potential from the mode control terminal (CT) in the television mode. A signal is output and a high potential signal is output in the regeneration mode.
이와같이 구성한 본 고안의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above are as follows.
브이 씨 알의 재생모드가 선택되면 모드제어단자(CT)로부터 출력되는 고전위 신호가 제1스위칭부(1)와 제2스위칭부(2)의 트랜지스터(Q2, Q3)의 베이스에 인가되어 상기 트랜지스터(Q2, Q3)가 온됨에 따라 이들 트랜지스터(Q2, Q3)의 콜렉터에 연결된 트랜지스터(Q1)(Q4)가 온된다. 따라서 전원(Va)은 상기 제1스위칭부(1)의 상기 트랜지스터(Q1)를 통해 RF변환기(5)에 인가되고, 전원(Vb)은 상기 제2스위칭부(2)의 상기 트랜지스터(Q4)를 통해 영상신호용 버퍼(3)의 트랜지스터(Q5)의 콜렉터와 음성신호용 버퍼(4)의 트렌지스터(Q6)의 콜렉터측에 인가된다.When the play mode of the V seed is selected, the high potential signal output from the mode control terminal CT is applied to the bases of the transistors Q2 and Q3 of the first switching unit 1 and the second switching unit 2. As transistors Q2 and Q3 are turned on, transistors Q1 and Q4 connected to the collectors of these transistors Q2 and Q3 are turned on. Therefore, the power supply Va is applied to the RF converter 5 through the transistor Q1 of the first switching unit 1, and the power supply Vb is the transistor Q4 of the second switching unit 2. The collector is applied to the collector of the transistor Q5 of the video signal buffer 3 and the collector side of the transistor Q6 of the audio signal buffer 4 through the signal.
이때, 테이프로부터 재생된 영상신호 및 음성신호가 상기 영상신호용 버퍼(3)와 음성신호용 버퍼(4)의 각 트랜지스터(Q5), (Q6)의 베이스에 인가되면, 상기 트랜지스터(Q5)(Q6)는 이 영상신호와 음성신호를 증폭하여 에미터를 통해 상기 RF변환기(5)의 영상 및 음성신호 입력단자(Vi), (Ai)로 출력하고, 상기 RFf변환기(5)는 이들 입력신호를 변조하여 출력단자(LO)로 출력한다.At this time, when the video signal and audio signal reproduced from the tape are applied to the bases of the transistors Q5 and Q6 of the video signal buffer 3 and the audio signal buffer 4, the transistors Q5 and Q6. Amplifies the video signal and the audio signal and outputs them to the video and audio signal input terminals Vi and Ai of the RF converter 5 through an emitter, and the RFf converter 5 modulates these input signals. Output to the output terminal (LO).
반면, 브이 씨 알이 텔레비젼모드로 선택되면 모드제어단자(CT)로 부터 출력되는 저전위신호에 의해 제1스위칭부(1)와 제2스위칭부(2)의 트랜지스터(Q2), (Q3)가 오프되고, 이에따라 상기 제1스위칭부(1) 및 제2스위칭부(2)의 트랜지스터(Q1), (Q4)가 오프되므로 RF변환기(5)에 전원(Va)이 인가되지 않아 상기 RF변환기(5)의 입력단자(ANT)로 입력되는 방송신호가 출력단자(LO)를 통해 출력된다.On the other hand, when V seed is selected as the television mode, transistors Q2 and Q3 of the first switching unit 1 and the second switching unit 2 are caused by the low potential signal output from the mode control terminal CT. Since the transistors Q1 and Q4 of the first switching unit 1 and the second switching unit 2 are turned off accordingly, a power supply Va is not applied to the RF converter 5, thereby preventing the RF converter. The broadcast signal input to the input terminal ANT of (5) is output through the output terminal LO.
한편, 상기 제2스위칭부(1)의 트랜지스터(Q4)가 오프됨에 따라 영상신호용 버퍼(3)와 음성신호용 버퍼(4)의 트랜지스터(Q5), (Q6)의 콜렉터에 전원(Vb)이 인가되지 않으므로 상기 트랜지스터(Q5), (Q6)의 베이스에 각기 인가되는 영상신호 및 음성신호는 최대로 억제되어 상기 RF변환기(5)의 영상 및 음성신호 입력단자(Vi)(Ai)로 입력된다.On the other hand, as the transistor Q4 of the second switching unit 1 is turned off, the power supply Vb is applied to the collectors of the transistors Q5 and Q6 of the image signal buffer 3 and the audio signal buffer 4. Since the video and audio signals respectively applied to the bases of the transistors Q5 and Q6 are suppressed to the maximum, they are input to the video and audio signal input terminals Vi and Ai of the RF converter 5.
상기에서 설명한 바와같이 본 고안은 브이 씨 알의 텔레비젼 모드시 RF변환기에 입력되는 영상신호 및 음성신호가 억제되어 방송신호와의 간섭현상이 최소화되므로 양질의 화면을 제공하는 효과가 있다.As described above, the present invention has the effect of providing a high-quality screen because the video signal and the audio signal input to the RF converter in the TV mode are suppressed to minimize interference with the broadcast signal.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880018880U KR940003918Y1 (en) | 1988-11-21 | 1988-11-21 | Reproducing signal surpressing circuit of vcr for tv mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880018880U KR940003918Y1 (en) | 1988-11-21 | 1988-11-21 | Reproducing signal surpressing circuit of vcr for tv mode |
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| Publication Number | Publication Date |
|---|---|
| KR900010690U KR900010690U (en) | 1990-06-04 |
| KR940003918Y1 true KR940003918Y1 (en) | 1994-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR2019880018880U KR940003918Y1 (en) | 1988-11-21 | 1988-11-21 | Reproducing signal surpressing circuit of vcr for tv mode |
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| KR (1) | KR940003918Y1 (en) |
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1988
- 1988-11-21 KR KR2019880018880U patent/KR940003918Y1/en not_active IP Right Cessation
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| KR900010690U (en) | 1990-06-04 |
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