KR960011301B1 - Noise erasing apparatus of television receiver - Google Patents
Noise erasing apparatus of television receiver Download PDFInfo
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- KR960011301B1 KR960011301B1 KR1019930023034A KR930023034A KR960011301B1 KR 960011301 B1 KR960011301 B1 KR 960011301B1 KR 1019930023034 A KR1019930023034 A KR 1019930023034A KR 930023034 A KR930023034 A KR 930023034A KR 960011301 B1 KR960011301 B1 KR 960011301B1
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- tuner
- noise
- television receiver
- signal
- noise canceling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
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- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
Abstract
Description
제1도는 중간주파 신호선(IF 신호선)에 혼입된 정전기등에 의한 잡음신호를 도시한 도면.1 is a diagram showing a noise signal caused by static electricity mixed in an intermediate frequency signal line (IF signal line).
제2도는 본 발명의 실시예1에 따른 텔레비젼 수상기의 튜너와 중간주파신호선의 잡음제거장치의 구성을 나타낸 블록도.2 is a block diagram showing the configuration of a noise canceling apparatus for a tuner and an intermediate frequency signal line of a television receiver according to Embodiment 1 of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 튜너 2 : 증폭기1: tuner 2: amplifier
3 : 검파부 4 : 신호검출부3: detector 4: signal detector
5 : 잡음제거부5: Noise canceling unit
본 발명은 텔레비젼 수상기에 있어서, 튜너와 중간주파 신호선에 순간적으로 도입되는 정전기등에 의한 잡을제거하여 쾌적한 음성 및 화상출력이 가능하도록 한 잡음제거장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a noise canceling apparatus in which a television receiver receives a job by static electricity, which is instantaneously introduced into a tuner and an intermediate frequency signal line, thereby enabling a comfortable voice and image output.
텔레비젼 수상기에 있어서, 튜너와 중간주파 신호선은 고주파의 신호가 처리되는 부분으로서, 외부로부터의 외란, 예를들어 정전기등의 영향을 받기쉬운 부분이다.In a television receiver, a tuner and an intermediate frequency signal line are portions in which a high frequency signal is processed, and a portion susceptible to external disturbances such as static electricity.
종래의 텔레비젼 수상기에 있어서는 정전기에 의한 잡음신호가 텔레비젼 수상기의 튜너와 중간주파 신호선에 도입되는 경우에, 이것이 증폭기에서 증폭되면서 방송신호와 함께 처리되게 된다.In a conventional television receiver, when a noise signal due to static electricity is introduced into a tuner and an intermediate frequency signal line of a television receiver, it is amplified by an amplifier and processed together with a broadcast signal.
제1도는 중간주파 방송신호에 정전기에 의한 잡음이 흔입된 상태를 나타낸 것으로, 정전기에 의해 중간주파 신호보다 신호레벨이 높고, 주파수도 높은 잡음신호가 튜너와 중간주파 신호선에 도입된 상태를 나타낸 것이다.1 is a diagram showing a state in which noise caused by static electricity is introduced into an intermediate frequency broadcast signal, and a state in which a noise signal having a higher signal level and a higher frequency than an intermediate frequency signal is introduced into a tuner and an intermediate frequency signal line by static electricity. .
그리고, 상기 정전기에 의한 잡음이 증폭기(2)를 통해 증폭되어 방송신호와 함께 처리되면, 텔레비젼 수상기의 화면에는 휜색의 점(SPOT)등이 나타나는 한편, 스피커에서는 탁탁 튀는 날카로운 소리가 출력되어 시청자에게 심한 불쾌감을 주게 된다.When the noise caused by the static electricity is amplified by the amplifier 2 and processed together with the broadcast signal, a white spot or the like appears on the screen of the television receiver, while a sharp sound popping out from the speaker is output to the viewer. It causes severe discomfort.
이에 본 발명은 상기한 사정을 감안해서 창출된 것으로, 텔레비젼 수상기의 튜너와 중간주파 신호선에 순간적으로 도입되는 정전기등에 의한 잡음을 제거하여 쾌적한 음성 및 화상이 출력되도록 한 텔레비젼 수상기의 잡음제거장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-described circumstances, and provides a noise reduction device for a television receiver that removes noise caused by static electricity, which is instantaneously introduced into a tuner of a television receiver and an intermediate frequency signal line, so that a pleasant voice and an image are output. Has its purpose.
상기 목적을 실현하기 위한 본 발명의 텔레비젼 수상기의 잡음제거장치는 방송을 선국하기 위한 튜너(1), 이 튜너(1)에 의해 선국된 방송신호를 전치증폭하기 위한 증폭기(2), 검파부(3), 신호 검출부(4)로 구성된 텔레비젼 수상기에 있어서, 위의 튜너(1) 후단의 중간주파신호선과 접지사이에 제3저항(R3), 병렬접속된 제1,제2저항(R1,R2), 소정의 정전압을 갖는 제너다이오우드(ZD1)가 직렬접속되어 구성되며, 위의 제1,제2저항(R1,R2)에 의한 강하전압과 상기 정전압을 합한 전압치 이상의 전위의 방송신호를 접지로 바이패스시켜 정전기에의해 발생된 잡음신호를 제거하는 잡음제거부(5)로 구성된 것을 특징으로 한다.The noise canceling device of a television receiver of the present invention for achieving the above object includes a tuner 1 for tuning broadcasts, an amplifier 2 for preamplifying the broadcast signals tuned by the tuner 1, and a detector ( 3) In the television receiver composed of the signal detector 4, the third resistor R3 and the first and second resistors R1 and R2 connected in parallel between the intermediate frequency signal line of the rear end of the tuner 1 and the ground. ) And a Zener diode ZD1 having a predetermined constant voltage is connected in series, and grounds a broadcast signal having a potential equal to or lower than the voltage drop of the first and second resistors R1 and R2 combined with the constant voltage. It is characterized by consisting of a noise removing unit (5) by bypassing to remove the noise signal generated by the static electricity.
상기한 구성으로 된 본 발명에 의하면, 튜너와 중간주파 신호선에 도입되는 잡음이 상기 잡음제거부에 의해 신속하게 제거되므로, 음성신호 및 영상신호의 품질을 한층 더 높일 수 있게 된다.According to the present invention having the above-described configuration, the noise introduced into the tuner and the intermediate frequency signal line is quickly removed by the noise canceling unit, so that the quality of the audio signal and the video signal can be further improved.
이하, 첨부된 도면들을 참조하여 본 발명에 따른 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 발명의 실시예1에 따른 텔레비젼 수상기의 튜너와 중간주파 신호선의 잡음제거장치의 구성을 나타낸 블록도로, 도면부호 1은 방송을 선국하기 위한 튜너이고, 2는 신호의 전치증폭을 위한 증폭기, 3은 검파부, 4는 영상신호와 음성신호의 신호검출부이다.2 is a block diagram showing the configuration of a tuner of a television receiver and a noise canceling device of an intermediate frequency signal line according to Embodiment 1 of the present invention, wherein 1 is a tuner for tuning a broadcast, and 2 is a preamplifier for signal amplification. An amplifier, 3 is a detector, and 4 is a signal detector of a video signal and an audio signal.
한편, 제2도에서 도면부호 5는 잠음제거부로서, 이는 중간주파 신호선에 직렬연결된 제3저항(R3), 병렬접속된 제1,제2저항(R1,R2), 제너다이오우드(ZD1)를 포함하여 구성되어 있다.Meanwhile, reference numeral 5 in FIG. 2 denotes a lock elimination unit, which includes a third resistor R3 connected in series to an intermediate frequency signal line, first and second resistors R1 and R2 connected in parallel, and a zener diode ZD1. It is configured to include.
제2도에 도시된 반대로, 본 발명은 방송을 선국하기 위한 튜너(1), 이 튜너(1)에 의해 선국된 방송신호를 전치증폭하기 위한 증폭기(2), 검파부(3), 신호 검출부(4)로 구성된 텔레비젼 수상기에 있어서, 위의 튜너(1) 후단의 중간주파 신호선과 접지사이에서 제3저항(R3), 병렬접속된 제1, 제2저항(R1,R2), 소정의 정전압을 갖는 제너다이오드(ZD1)가 직렬접속되어 구성되며, 위의 제1,제2저항(R1,R2)에 의한 강하전압과 상기 정전압을 합한 전압치 이상의 전위의 방송신호를 접지로 바이패스시켜 정전기에 의해 발생된 잡음신호를 제거하는 잡음 제거부(5)로 구성된다.In contrast to that shown in FIG. 2, the present invention provides a tuner 1 for tuning broadcasts, an amplifier 2 for preamplifying a broadcast signal tuned by the tuner 1, a detector 3, and a signal detector. In the television receiver composed of (4), the third resistor R3, the first and second resistors R1 and R2 connected in parallel, and the predetermined constant voltage are connected between the intermediate frequency signal line of the rear end of the tuner 1 and the ground. Zener diode (ZD1) having a configuration is connected in series, the static voltage by bypassing the broadcast signal of the voltage drop of the voltage equal to or higher than the sum of the constant voltage and the voltage drop by the first and second resistors (R1, R2) above to ground Noise canceling section 5 for removing the noise signal generated by the.
위와같이 구성된 본 발명의 동작을 자세히 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above in detail.
먼저, 안테나를 통해 수신된 방송신호는 튜너(1)에 의해 선국되어 잡음 제거부(5)로 입력된다.First, the broadcast signal received through the antenna is tuned by the tuner 1 and input to the noise canceling unit 5.
이 잡음제거부(5)에서는 상기 병렬접속된 저항(R1,R2)에서 강하되는 전압과 제너다이오우드(ZD1)에 의한 제너전압을 합한 전압치 이상의 레벨의 방송신호가 접지로 바이패스되게 된다.In the noise canceling section 5, a broadcast signal having a level equal to or higher than the sum of the voltage dropped by the parallel-connected resistors R1 and R2 and the zener voltage by the zener diode ZD1 is bypassed to ground.
즉, 상기 저항(R1,R2)과 제너다이오우드(ZD1)에 의한 설정전압을 중간주파 방송신호의 전위와 동일하게 설정함으로써, 정전기에 의한 잡음이 정밀하게 제거될 수 있다.That is, by setting the voltages set by the resistors R1 and R2 and the zener diode ZD1 to be equal to the potential of the intermediate frequency broadcast signal, noise caused by static electricity can be precisely removed.
또한, 상기 잡음제거부(5)는 가능한한 튜너(1)와 가까운 위치에 설치되는 것이 바람직한바, 이는 튜너(1)측에 가깝게 설치할수록 증폭기(2)로 유입되는 잡음을 줄일 수 있기 때문이다.In addition, the noise canceling unit 5 is preferably installed as close to the tuner 1 as possible, because the closer to the tuner 1 side, the less noise may be introduced into the amplifier 2. .
따라서, 잡음제거부(5)를 튜너(1)에 가능한한 가까운 위치에 설치하면서 그 접지선을 튜너(1) 공통으로 사용하게 되면, 정전기에 의한 잡음을 효과적으로 줄일 수 있게 된다.Therefore, when the noise removing unit 5 is installed in the position as close as possible to the tuner 1 and the ground wire is used in common in the tuner 1, noise caused by static electricity can be effectively reduced.
한편, 제1도의 잡음제거부(5)에서 저항(R1,R2)을 병렬로 설치한 것은 잡음제거부(5)에 의한 잡음 제거레벨을 보다 정밀하게 설정하기 위한 것인바, 즉, 상기 저항(R1,R2)을 가변저항으로 하게 되면, 장치마다의 특성의 차이를 고려하여 잡음 제거레벨을 보다 정밀하게 설정할 수 있게 된다.On the other hand, the resistors R1 and R2 provided in parallel in the noise canceling unit 5 of FIG. 1 are used to more accurately set the noise canceling level by the noise canceling unit 5, that is, the resistance ( When R1 and R2) are variable resistors, the noise cancellation level can be set more precisely in consideration of the difference in characteristics of each device.
이와같이 위의 잡음제거부(5)에서 잡음이 제거되어 출력된 방송신호는 증폭기(2)로 입력되어 전치증폭된 다음, 검파부(3)로 입력되어 검파된다.As such, the broadcast signal output by removing the noise from the noise removing unit 5 is input to the amplifier 2, preamplified, and then input to the detector 3 to be detected.
그 다음, 위의 검파부(3)에서 검파되어 출력된 방송신호는 신호검출부(4)에서 영상신호 및 음성신호로 검출되어 출력된다.Next, the broadcast signal detected and output by the detector 3 is detected and output as a video signal and an audio signal by the signal detector 4.
이상 설명한 바와같이 본 발명에 의하면, 텔레비젼 수상기의 튜너와 중간주파 신호선에 순간적으로 도입되는 정전기등에 의한 잡음을 효과적으로 제거할 수 있는 텔레비젼 수상기의 튜너와 중간주파 신호선의 잡음제거장치를 실현할 수 있게 된다.As described above, according to the present invention, it is possible to realize a noise canceling device of a tuner of a television receiver and an intermediate frequency signal line that can effectively remove noise caused by static electricity or the like momentarily introduced into the tuner of the television receiver and the intermediate frequency signal line.
또한, 본 발명은 상기 실시예에 한정되지는 않으며, 본 발명의 기술적 요지를 벗어나지 않는 범위내에서 변형 실시될 수 있다.In addition, the present invention is not limited to the above embodiments and may be modified without departing from the technical gist of the present invention.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930023034A KR960011301B1 (en) | 1993-11-01 | 1993-11-01 | Noise erasing apparatus of television receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930023034A KR960011301B1 (en) | 1993-11-01 | 1993-11-01 | Noise erasing apparatus of television receiver |
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| Publication Number | Publication Date |
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| KR950016251A KR950016251A (en) | 1995-06-17 |
| KR960011301B1 true KR960011301B1 (en) | 1996-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019930023034A KR960011301B1 (en) | 1993-11-01 | 1993-11-01 | Noise erasing apparatus of television receiver |
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