KR900010959Y1 - SECAM Color Noise Reduction Circuit of PAL / SECAM TV - Google Patents
SECAM Color Noise Reduction Circuit of PAL / SECAM TV Download PDFInfo
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- KR900010959Y1 KR900010959Y1 KR2019870014926U KR870014926U KR900010959Y1 KR 900010959 Y1 KR900010959 Y1 KR 900010959Y1 KR 2019870014926 U KR2019870014926 U KR 2019870014926U KR 870014926 U KR870014926 U KR 870014926U KR 900010959 Y1 KR900010959 Y1 KR 900010959Y1
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Abstract
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Description
본 고안의 회로도Circuit diagram of the present invention
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 앰프 2 : PAL : 킬러1: amplifier 2: PAL: killer
3 : 색포화조정단 4 : 색복조부3: color saturation adjusting unit 4: color demodulation unit
5 : 1H 지연부 6 : 시스템스위치부Ⅰ5: 1H delay unit 6: System switch unit I
7 : 크로마게이트 8 : SECAM 인색앰프7: chromagate 8: SECAM sting amp
9 : 킬러앰프 10 : 시스템스위치Ⅱ9: Killer Amplifier 10: System Switch II
20 : PAL크로마단 30 : SECAM크로마단20: PAL chroma step 30: SECAM chroma step
Q1: 트랜지스터 R1-R4: 저항Q 1 : transistor R 1 -R 4 : resistance
C1, C2: 콘덴서 B+: 전원C 1 , C 2 : Capacitor B + : Power
본 고안은 PAL방식과 SECAM방식을 겸용으로 사용하는 칼라 텔레비젼에 있어서 PAL방송 수신이 나타나는 SECAM칼라 노이즈를 제거해 주도록한 PAL/SECAM TV의 SECAM칼라 노이즈 제거 회로에 관한 것이다.The present invention relates to a SECAM color noise canceling circuit of a PAL / SECAM TV to remove SECAM color noise in which PAL broadcast reception appears in a color television using both PAL and SECAM.
종래에는 PAL/SECAM겸용 방식의 칼라 텔레비젼에서 PAL방송을 수신할 경우 PAL칼라 신호가 SECAM크로마단의 시스템 스위치Ⅱ에 입력되게 되므로써 SECAM크로마단의 SECAM인식 앰프가 동작상태가 되어 비록 노이즈 신호이지만 SECAM칼라 신호가 크로마 게이트에 혼입되므로 시스템 스위치Ⅰ를 통하여 PAL칼라신호에 SECAM칼라 노이즈가 발생되는 문제점이 있는 것이었다.Conventionally, when a PAL broadcast is received on a color television of a PAL / SECAM system, the PAL color signal is input to the system switch II of the SECAM chroma stage, so that the SECAM recognition amplifier of the SECAM chroma stage is in operation. Since the signal is mixed in the chroma gate, SECAM color noise is generated in the PAL color signal through the system switch I.
본 고안은 이와 같은 점을 감안하여 PAL/SECAM겸용 방식의 칼라 텔레비젼에서 PAL방송 수신시 PAL크로마단의 색포화 조정단의 조정 전압이 설정되는 것을 이용하여 SECAM크로마단의 SECAM칼라 신호를 설정해주는 것을 억제해주므로써 SECAM칼라 노이즈를 완전히 제거해 주도록 한 것이다.In view of the above, the present invention is to set the SECAM color signal of the SECAM chroma end by using the setting voltage of the color saturation adjustment stage of the PAL chroma end when receiving PAL broadcast on a color television of the PAL / SECAM combined method. By suppressing it, SECAM color noise is completely removed.
이를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.
PAL신호는 앰프(1)를 통한 후 시스템스위치Ⅰ(6)와 1H지연부(5)를 통하여 PAL킬러(2)가 연결되고 색포화조정단(3)이 연결된 색복조부(4)에 인가되게 PAL 크로마단(20)을 구성하며 색복조부(4)의 출력은 시스템스위치Ⅱ(10)를 통하여 칼라콘트를 신호로 인가되어진다.The PAL signal is applied to the color demodulator 4 through which the PAL killer 2 is connected and the color saturation adjustment stage 3 is connected through the system switch I 6 and the 1H delay unit 5 through the amplifier 1. The PAL chroma stage 20 is configured, and the output of the color demodulator 4 is applied with the color control as a signal through the system switch II (10).
그리고 SECAM인식앰프(8)에는 킬러앰프(9)를 통하여 시스템스위치Ⅱ(10)를 연결함과 동시에 SECAM칼라신호가 입력되는 크로마게이트(7)를 연결하며 크로마게이트(7)에는 시스템스위치Ⅰ(6)을 연결하여 SECAM크로마단(30)을 구성한다.A system switch II (10) is connected to the SECAM recognition amplifier (8) through a killer amplifier (9), and a chroma gate (7) to which a SECAM color signal is input is connected. 6) is connected to configure the SECAM chroma end 30.
이렇게 PAL크로마단(20)과 SECAM크로마단930)이 구성된 PAL/SECAM겸용방식 텔레비젼 회로에 있어서 색포화조정단(3)에는 전원(B+)을 저항(R4)와 콘덴서(C1)를 통하여 인가시킴과 동시에 저항(R1)과 접지된 저항(R2)을 통하여 트랜지스터(Q1)의 베이스를 연결하며 에미터측이 접지된 트랜지스터(Q1)의 콜렉터측에는 저항(R3)과 콘덴서(C2)를 통하여 전원(B+)을 인가시킴과 동시에 SECAM인식앰프(8)가 연결되게 구성한 것이다.In the PAL / SECAM combined television circuit including the PAL chroma stage 20 and the SECAM chroma stage 930, the color saturation adjustment stage 3 supplies a power supply B + to a resistor R 4 and a capacitor C 1 . At the same time, the base of transistor Q 1 is connected through resistor R 1 and grounded resistor R 2 , and the resistor R 3 and the capacitor are connected to the collector side of transistor Q 1 with the emitter side grounded. The power supply B + is applied through C 2 and the SECAM recognition amplifier 8 is connected.
이와 같이 구성된 본 고안의 작용 효과를 살펴보면 PAL/SECAM겸용방식의 칼라텔레비젼에서 PAL방송수신시에는 PAL크로마단(20)의 색포화 조정단(3)의 출력전압이 하이레벨(약 7V)로 출력되어지며 SECAM방송수신시에는 색포화 조정단(3)의 출력 전압이 로우레벨(약 0.1V)로 출력되는 것을 이용하여 PAL방송 수신시 SECAM칼라 노이즈를 제거해주도록 한 것이다.When the PAL broadcast is received in the PAL / SECAM combined color television, the output voltage of the color saturation adjustment stage 3 of the PAL chroma stage 20 is output at a high level (about 7 V). When receiving the SECAM broadcast, the output voltage of the color saturation control stage 3 is output at a low level (about 0.1 V) to remove the SECAM color noise when the PAL broadcast is received.
즉, 종래에는 SECAM크로마단(30)의 SECAM인식앰프(8)가 PAL방송 수신시 동작상태가 되므로 노이즈인 SECAM칼라 신호가 크로마게이트(7)에 혼입되어 시스템스위치Ⅰ(6)에 인가되므로써 PAL칼라 신호에 SECAM칼라 노이즈가 발생되는 것이었다.That is, conventionally, the SECAM recognition amplifier 8 of the SECAM chroma stage 30 becomes an operation state when receiving PAL broadcasts. Therefore, the noise SECAM color signal is mixed into the chroma gate 7 and applied to the system switch I 6 so that the PAL SECAM color noise was generated in the color signal.
따라서 본 고안에서는 이러한 SECAM칼라 노이즈를 없애주도록 한 것으로써 PAL방송 수신시 PAL크로마단(20)의 색포화조정단(3)에서는 하이레벨을 출력시키며 이러한 하이레벨 전압은 바이어스용 저항(R1)(R2)을 통하여 트랜지스터(Q1)의 베이스에 인가되므로써 트랜지스터(Q1)가 도통하게 되고 트랜지스터(Q1)의 도통으로 콜렉터 전위가 접지 전위가 되므로 SECAM인식앰프(8)에서 출력되던 SECAM인식 신호의 출력이 없어지게 되며 킬러앰프(9)가 동작되어 SECAM칼라 노이즈의 혼입을 막아주게 된다.Therefore, in the present invention, the SECAM color noise is eliminated, and the color saturation adjustment stage 3 of the PAL chroma stage 20 outputs a high level when receiving PAL broadcast, and the high level voltage is a bias resistor R 1 . The transistor Q 1 becomes conductive by being applied to the base of the transistor Q 1 through (R 2 ), and the collector potential becomes the ground potential due to the conduction of the transistor Q 1 , so the SECAM outputted from the SECAM recognition amplifier 8 The output of the recognition signal is lost and the killer amplifier 9 is operated to prevent the mixing of SECAM color noise.
즉, SECAM인식앰프(8)에 로우 레벨 전위가 인가되면 SECAM인식 신호를 출력시키지 않게 되고 킬러앰프(9)에서는 SECAM신호를 차단해주어 PAL방송 수신시 나타나던 SECAM칼라 노이즈의 혼입을 완전히 차단시켜 주게되는 것이다.That is, when a low level potential is applied to the SECAM recognition amplifier 8, the SECAM recognition signal is not output and the killer amplifier 9 blocks the SECAM signal, thereby completely blocking the incorporation of SECAM color noise that appeared during PAL broadcast reception. will be.
그러나 SECAM방송 수신시에는 PAL크로마단(20)의 색포화 조정단(3)에서 로우 레벨을 출력시키게 되므로 저항(R1)(R2)이 연결된 트랜지스터(Q1)는 "턴오프"되어 콜렉터측 전위는 하이레벨되므로써 SECAM인식앰프(8)에는 하이레벨 전위가 인가되게 된다.However, when the SECAM broadcast is received, the color saturation adjustment stage 3 of the PAL chroma stage 20 outputs a low level, so that the transistor Q 1 to which the resistors R 1 and R 2 are connected is "turned off" and the collector is turned off. Since the side potential is high level, the high level potential is applied to the SECAM recognition amplifier 8.
따라서 SECAM인식앰프(8)는 정상적인 동작을 수행하게 되어 SECAM칼라 신호를 출력시키게 되며 이때 킬러앰프(9)는 동작을 멈추게되므로써 SECAM방송을 시청할 수 있는 것이다.Therefore, the SECAM recognition amplifier 8 performs a normal operation and outputs a SECAM color signal. At this time, the killer amplifier 9 can watch SECAM broadcast by stopping the operation.
즉, 본 고안은 PAL크로마단(20)의 색포화조정단(3)에서 PAL방송 수신시에는 하이레벨을 출력시키고 SECAM방송 수신시에는 로우 레벨을 출력시키는 것을 이용하여 트랜지스터(Q1)와 저항(R1-R3)으로 이러한 신호를 반전시켜 SECAM인식앰프(8)에 인가시켜 주므로써 PAL 방송시 SECAM칼라 노이즈의 혼입을 막아주도록 한 것이다.That is, the subject innovation is PAL chroma stage 20 color saturation adjustment end (3) PAL broadcast receiver when the output of the high level and SECAM broadcast reception is used that for outputting a low level, and the transistor (Q 1) in the resistance of the This signal is inverted by (R 1 -R 3 ) and applied to the SECAM recognition amplifier 8 to prevent the mixing of SECAM color noise during PAL broadcasting.
따라서 본 고안은 PAL/SECAM겸용 방식의 칼라 텔레비젼에서 PAL방송 수신시 나타나는 SECAM칼라 노이즈를 간단한 회로의 추가로 완전히 없애줄 수 있는 효과가 있는 것이다.Therefore, the present invention has the effect of completely eliminating SECAM color noise appearing when receiving PAL broadcast in color television of PAL / SECAM combined type by a simple circuit.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870014926U KR900010959Y1 (en) | 1987-08-31 | 1987-08-31 | SECAM Color Noise Reduction Circuit of PAL / SECAM TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870014926U KR900010959Y1 (en) | 1987-08-31 | 1987-08-31 | SECAM Color Noise Reduction Circuit of PAL / SECAM TV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890005866U KR890005866U (en) | 1989-04-21 |
| KR900010959Y1 true KR900010959Y1 (en) | 1990-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870014926U KR900010959Y1 (en) | 1987-08-31 | 1987-08-31 | SECAM Color Noise Reduction Circuit of PAL / SECAM TV |
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| Country | Link |
|---|---|
| KR (1) | KR900010959Y1 (en) |
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1987
- 1987-08-31 KR KR2019870014926U patent/KR900010959Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR890005866U (en) | 1989-04-21 |
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