KR200143237Y1 - An unnecessary wave cutting circuit incoming the prescaler - Google Patents

An unnecessary wave cutting circuit incoming the prescaler Download PDF

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Publication number
KR200143237Y1
KR200143237Y1 KR2019960017433U KR19960017433U KR200143237Y1 KR 200143237 Y1 KR200143237 Y1 KR 200143237Y1 KR 2019960017433 U KR2019960017433 U KR 2019960017433U KR 19960017433 U KR19960017433 U KR 19960017433U KR 200143237 Y1 KR200143237 Y1 KR 200143237Y1
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South Korea
Prior art keywords
prescaler
circuit
oscillator
cable
present
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KR2019960017433U
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Korean (ko)
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KR980005931U (en
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박성동
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이형도
삼성전기주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/10Adaptations for transmission by electrical cable
    • H04N7/102Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/21Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

본 고안은 프리스케일러로 유입되는 불요파 차단회로에 관한 것으로, 특히 케이블-텔레비젼 수신시스템에서 발진부에서 프리스케일러로 유입되는 불필요한 신호를 차단시킴으로써, 케이블-텔레비젼의 영상화질을 개선하는 프리스케일러로 유입되는 불요파 차단회로에 관한 것이다.The present invention relates to an unwanted wave blocking circuit flowing into the prescaler, and in particular, by blocking unnecessary signals flowing into the prescaler from the oscillator in the cable-television receiving system, the unwanted wave blocking introduced into the prescaler improves the image quality of the cable television. It is about a circuit.

본 고안의 회로는 케이블-텔레비젼(cable-television) 수신시스템내 광대역 발진부와 프리스케일러 사이에 불요파를 차단시키는 회로에 있어서, 상기 발진부와 프로스케일러 사이에 크기감쇄용 저항회로부를 접속구성한 것이다.The circuit of the present invention is a circuit which cuts out an undesired wave between a wideband oscillator and a prescaler in a cable-television reception system, and connects a resistance circuit for size reduction between the oscillator and a proscaler.

Description

프리스케일러로 유입되는 불요파 차단회로Uninterrupted blocking circuit flowing into the prescaler

본 고안은 프리스케일러로 유입되는 불요파 차단회로에 관한 것으로, 특히 케이블-텔레비젼 수신시스템에서 발진부에서 프리스케일러로 유입되는 불필요한 신호를 차단시키도록 하는 프리스케일러로 유입되는 불요파 차단회로에 관한 것이다.The present invention relates to an unwanted wave blocking circuit flowing into the prescaler, and more particularly, to an unwanted wave blocking circuit flowing into the prescaler to block an unnecessary signal flowing into the prescaler from the oscillator in a cable-television receiving system.

일반적으로, 케이블-텔레비젼 수신시스템에는 발진된 주파수를 프리스케일러로 분주하여 PLL로 제공하고, 상기 PLL에서는 상기 주파수를 검출한후 소망하는 대역을 수신하도록 발진주로 튜닝전압을 제공한다.In general, a cable-television receiver system divides an oscillated frequency into a prescaler and provides it to a PLL, and the PLL provides a tuning voltage as an oscillation line so as to receive a desired band after detecting the frequency.

일반적인 기술에 관련되는 종래의 기술에 대한 구성은 제1도에 도시되어 있으며, 제1도를 참조하면, 종래의 발진부(1)와 프리스케일러(3)간에는 직접접속되어 있으며, 튜닝전압(Vt)에 의한 바랙터다이오드의 용량가변에 따른 공진주파수를 발진부(1)에서 발진시켜서 프리스케일러(3)로 제공한다.The configuration of the conventional technique related to the general technique is shown in FIG. 1, and referring to FIG. 1, the conventional oscillation unit 1 and the prescaler 3 are directly connected and connected to the tuning voltage Vt. The oscillation frequency is oscillated by the oscillator 1 according to the capacitance change of the varactor diode by the oscillator 1 and is provided to the prescaler 3.

이와갈은 종래기술에 대한 개선적 및 분제적은 상기 발진부와 프리스케일러와의 완충기능을 수행하는 회로가 없는 관계로, 과도한 임펄스나 직류전압에 의해 프리스케일러IC가 파괴되는 것이다.In this regard, the improvement and separation of the prior art is that the prescaler IC is destroyed by excessive impulse or DC voltage since there is no circuit for performing the buffer function between the oscillator and the prescaler.

상기한 문제점을 해결하는 것이 본 고안이 달성하고자하는 기술적인 과제이고, 이와같은 기술적인 과제를 달성하기 위한 기술적인 수단으로써, 본 고안의 회로는 케이블-텔레비젼(cable-television) 수신시스템내 광대역 발진부와 프리스케일러 사이에 불요파를 차단시키는 회로에 있어서,Solving the above problems is a technical problem to be achieved by the present invention, and as a technical means for achieving such a technical problem, the circuit of the present invention is a broadband oscillator in a cable-television receiving system. In a circuit that cuts out an unwanted wave between a and a prescaler,

상기 발진부와 프로스케일러 사이에 크기 감쇄용 저항회로부를 접속구성함을 특징으로 한다.It characterized in that the connection between the oscillation portion and the pro-scaler sized resistance circuit unit for attenuation.

제1도는 종래의 발진부 및 프리스케일러의 블럭도이다.1 is a block diagram of a conventional oscillator and a prescaler.

제2도는 본 고안에 따른 프리스케일러로 유입되는 불요파 차단회로도이다.2 is a diagram of an unwanted wave blocking circuit flowing into a prescaler according to the present invention.

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

1 : 발진부 2 : 불요파 차단회로부1: Oscillation part 2: Uninterrupted circuit breaker

3 : 프리스케일러3: prescaler

이하, 본 고안에 따른 프리스케일러로 유입되는 불요파 차단회로의 바람직한 실시에를 첨부한 도면을 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the unwanted wave blocking circuit flowing into the prescaler according to the present invention.

본 고안에 참조된 도면에서 실질적으로 동일한 구성과 기능을 가진 구성요소들은 동일한 부호를 사용할 것이다.In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

제2도는 본 고안에 따른 프리스케일러로 유입되는 목요파 차단회로도로서, 제2도를 참조하면, 본 고안의 프리스케일러로 유입되는 불요파 차단회로는 케이블-텔레비젼(cable-television) 수신시스템내 광대역 발진부(1)와 프리스케일러(3) 사이에 불요파를 차단시키는 회로에 있어서, 상기 발진부(1)와 프리스케일러(3) 사이에 크기감쇄용 저항회로부(2)를 접속하여 구성한다.FIG. 2 is a block diagram of a wooden wave breaking circuit flowing into the prescaler according to the present invention. Referring to FIG. 2, the unwanted wave blocking circuit flowing into the prescaler of the present invention is a broadband oscillation unit in a cable-television receiving system. In the circuit which interrupts an unwanted wave between 1) and the prescaler 3, it is comprised by connecting the magnitude-resistance resistance circuit part 2 between the said oscillation part 1 and the prescaler 3. As shown in FIG.

상기 저항회로부(2)는 선로상 직렬로 접속한 저항(R1)과, 상기 저항(R1)에 병렬로 접지로 접속시킨 저항(R2)으로 구성한다.The resistance circuit section 2 includes a resistor R1 connected in series on a line and a resistor R2 connected in parallel with the resistor R1 in ground.

여기서, 도면중 미설명부호인 VT는 튜닝전압이고, VD1은 바랙터다이오드이며, C1은 결합콘덴서이다.Here, VT, which is not described in the drawing, is a tuning voltage, VD1 is a varactor diode, and C1 is a coupling capacitor.

이와같이 구성된 본 고안의 회로에 따른 동작을 첨부도면에 의거하여 하기에 상세히 설명한다.Operation according to the circuit of the present invention configured as described above will be described in detail below based on the accompanying drawings.

제2도를 참조하면, 마이크로프로세서 또는 PLL에서 제공되는 튜닝전압(VT)에 의해서 바랙터데이오드(VD)의 용량이 가변되고, 상기 가변된 용량과 발진부의 내부 공진용 인덕턴스에 의해서 소정의 주파수로 공진된 다음에, 상기 공진된 주파수는 발진부(1)에서 소정의 크기로 발진되어서 불요파 차단회로부(2)를 통해서 프리스케일러(3) 로 제공된다.Referring to FIG. 2, the capacitance of the varactor diode VD is changed by a tuning voltage VT provided from a microprocessor or a PLL, and a predetermined frequency is caused by the variable capacitance and the internal resonance inductance of the oscillator. After resonating with the resonant frequency, the resonant frequency is oscillated in the oscillation section 1 to a predetermined size and provided to the prescaler 3 through the unwanted wave blocking circuit section 2.

종래에는 상기 발진부(1)와 프리스케일러(3)가 적접접속되는 관제로, 상기 발진부(1)에서의 전원이나 튜닝전압 및 임펄스등이 발진부의 내부접지단과 프리스케일러로의 신호전송통로를 통해서 비정상적으로 프리스케일러(3)로 인가되어, 상기 프리스케일러가 오동작하거나 심한 경우에는 파괴되어 기능이 상실되었지만, 본 고안에 의한 불요파 차단회로부(2)에 의해서 발진부(1)에서 비정상적으로 프리스케일러로 인가되는 불요파가 차단되는 것이다.Conventionally, the oscillator 1 and the prescaler 3 are directly connected to each other, and the power supply, the tuning voltage, and the impulse in the oscillator 1 are abnormally prescaler through the signal transmission path to the internal ground terminal and the prescaler of the oscillator. (3), the prescaler malfunctions or is destroyed in severe cases, but the function is lost, but the unnecessary wave applied from the oscillation part 1 to the prescaler abnormally by the unnecessary wave blocking circuit part 2 according to the present invention is blocked. Will be.

상술한 바와같은 본 고안에 따르면, 케이블-텔레비젼 수신시스템에서 발진부에서 프리스케일러로 유입되는 불필요한 신호를 차단시킴으로써, 케이블-텔레비젼의 영상화질을 개선하는 특별한 효과가 았다.According to the present invention as described above, by blocking unnecessary signals flowing into the prescaler from the oscillator in the cable-TV receiving system, there was a special effect of improving the image quality of the cable-TV.

이상의 설명은 본 고안의 일실시예에 대한 설명에 불과하며, 본 고안은 그 구성의 범위내에서 다양한 변경 및 개조가 가능하다.The above description is only a description of an embodiment of the present invention, and the present invention is capable of various changes and modifications within the scope of its configuration.

본 고안의 목적은 케이블-텔레비젼 수신시스템에서 발진부에서 프리스케일러로 유입되는 불필요한 신호를 차단시킴으로써, 케이블-텔레비젼의 영상화질을 개선하는 프리스케일러로 유입되는 불요파 차단회로를 제공하는데 있다.An object of the present invention is to provide an unnecessary wave blocking circuit flowing into a pre-scaler to improve the image quality of the cable-TV by blocking unnecessary signals flowing from the oscillator to the prescaler in the cable-TV receiving system.

Claims (2)

케이블-텔레비젼(cable-te1evision) 수신시스템내 광대역 발진부(1)와 프리스케일러(3) 사이에 불요파를 차단시키는 회로에 있어서, 상기 발진부(1)와 프로스케일러(3) 사이에 크기감쇄용 저항회로부(2)를 접속구성함을 특징으로하는 프리스케일러로 유입되는 불요파 차단회로.A circuit for blocking unwanted waves between a wideband oscillator (1) and a prescaler (3) in a cable-te1evision receiving system, comprising: a resistance circuit portion for reducing the magnitude between the oscillator (1) and the proscaler (3) (2) an unwanted wave blocking circuit flowing into the prescaler, characterized in that the connection configuration. 상기 저항회로부(2)는 선로상 직렬로 접속한 저항(R1)과, 상기 저항(R1)에 병렬로 접지로 접속시킨 저항(R2)으로 구성함을 특징으로하는 프리스케일러로 유입되는 불요파 차단회로.The resistor circuit 2 includes a resistor R1 connected in series on a line and a resistor R2 connected in parallel with the resistor R1 to ground in parallel. .
KR2019960017433U 1996-06-25 1996-06-25 An unnecessary wave cutting circuit incoming the prescaler KR200143237Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019960017433U KR200143237Y1 (en) 1996-06-25 1996-06-25 An unnecessary wave cutting circuit incoming the prescaler

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Application Number Priority Date Filing Date Title
KR2019960017433U KR200143237Y1 (en) 1996-06-25 1996-06-25 An unnecessary wave cutting circuit incoming the prescaler

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KR200143237Y1 true KR200143237Y1 (en) 1999-06-01

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