KR0147906B1 - Booster and high modulated matching circuit - Google Patents
Booster and high modulated matching circuit Download PDFInfo
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- KR0147906B1 KR0147906B1 KR1019950021071A KR19950021071A KR0147906B1 KR 0147906 B1 KR0147906 B1 KR 0147906B1 KR 1019950021071 A KR1019950021071 A KR 1019950021071A KR 19950021071 A KR19950021071 A KR 19950021071A KR 0147906 B1 KR0147906 B1 KR 0147906B1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1766—Parallel LC in series path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
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- Processing Of Color Television Signals (AREA)
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Abstract
본 발명은 PAL방식에서의 위상동기루우프용 고주파변조기회로내 부우스터단과 고주파변조단간의 매칭회로에 관한 것으로, 특히 상기 부우스터단과 고주파변조 단간에 크로마비트(Chroma beat)를 개선하므로써, 양호한 화질을 제공하는 부우스터단과 고주파변조단간의 매칭회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matching circuit between a booster stage and a high frequency modulation stage in a high frequency modulator circuit for a phase-locked loop in a PAL method. The present invention relates to a matching circuit between a booster stage and a high frequency modulation stage.
본 발명은 기술적인 구성은 재생된 오디오/비디오신호(Ain/Vin)를 데이터(D)와 클럭신호(CLK)에 의해 텔레비젼신호로 고주파변조하는 고주파변조IC와, 고주파입력 단자를 통해서 유입되는 고주파신호와 상기 고주파변조IC에서 변조된 오디오/비디오신호(Ain/Vin)를 고주파출력단자 또는 비디오단자를 통해서 고주파신호로 출력하는 부우스터IC간의 매칭회로에 있어서, 상기 부우스터IC과 고주파변조IC간에 콘덴서(C2)와 저항(R2)을 직렬로 접속구성하고, 상기 콘덴서(C2)에 코일(L2)을 병렬로 접속구성한 것이다.The technical configuration of the present invention is a high frequency modulation IC which modulates a reproduced audio / video signal (Ain / Vin) into a television signal by data (D) and a clock signal (CLK), and a high frequency introduced through a high frequency input terminal. A matching circuit between a signal and a booster IC for outputting an audio / video signal (Ain / Vin) modulated by the high frequency modulation IC as a high frequency signal through a high frequency output terminal or a video terminal, wherein the booster IC and the high frequency modulation IC The capacitor C2 and the resistor R2 are connected in series, and the coil L2 is connected in parallel with the capacitor C2.
Description
제1도는 종래 부우스터단과 고주파변조단간의 매칭회로.1 is a matching circuit between a conventional booster stage and a high frequency modulation stage.
제2도는 본 발명에 따른 부우스터단과 고주파변조단간의 매칭회로.2 is a matching circuit between the booster stage and the high frequency modulation stage according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 부우스터 IC 3 : 고주파변조 IC1: Booster IC 3: High Frequency Modulation IC
20 : 매칭회로20: matching circuit
본 발명은 PAL방식에서의 위상동기루우프용 고주파변조기회로내 부우스터단과 고주파변조단간의 매칭회로에 관한 것으로, 특히 상기 부우스터단과 고주파변조 단간에 크로마비트(Chroma beat)를 개선하므로써, 양호한 화질을 제공하는 부우스터단과 고주파변조단간의 매칭회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matching circuit between a booster stage and a high frequency modulation stage in a high frequency modulator circuit for a phase-locked loop in a PAL method. The present invention relates to a matching circuit between a booster stage and a high frequency modulation stage.
일반적으로, 전기회로간의 신호전송에 있어서, 신호의 손실을 방지하면서 효율적인 신호전송을 위해서는 임피던스를 매칭시킨다.In general, in signal transmission between electric circuits, impedance is matched for efficient signal transmission while preventing signal loss.
한편, NTSC(National Television System Committee)방식에서는 (R-Y),(B-Y), (G-Y)의 3가지의 색차신호중에 R-Y신호와 B-Y신호의 2개의 신호만 전송하고 이것에 휘도 신호인 Y신호를 가하여 전송한다. 상기 휘도신호인 Y신호는 적색신호(R)와 녹색신호(G)와 청색신호(B)가 적절한 비율로 합성된 신호이다.On the other hand, in the NTSC (National Television System Committee) method, only two signals of the RY signal and the BY signal are transmitted among the three color difference signals (RY), (BY), and (GY), and a Y signal, which is a luminance signal, is added to the signal. send. The Y signal, which is the luminance signal, is a signal obtained by combining the red signal R, the green signal G, and the blue signal B at an appropriate ratio.
이에 반하여, PAL(Phase Alternation by Line)방식은 2개의 색성분, (B-Y),(R-Y)를 동시에 보내는 것은 NTSC방식과 동일하지만 (R-Y)신호를 주사선마다 위상 반전하고 이것과 (B-Y)신호로 부반송파를 직각변조하여 보낸다.In contrast, the PAL (Phase Alternation by Line) method is the same as the NTSC method of simultaneously sending two color components, (BY) and (RY), but inverts the (RY) signal for each scan line and subcarriers with this and (BY) signals. Send a right-handed modulation.
상기 부반송파와 수평주사의 동기는 NTSC와 동일하게 수평주사 주파수의 1/2의 홀수배에 부반송주파수를 선정하면 (R-Y)성분의 부반송파위상의 주사선간에서 같아져서 이른바 베네시언 블라인드라고 하는 세로무늬방해가 나타난다. 그래서 PAL 방식에서는 NTSC방식과 다르게 1/4라인 오프셋을 쓰고 있다. 따라서 부반송주파수(fp)는 fp=(284-1/4)fh+fh/625=4.43[MHz]이고, 여기서 fh는 수평동기 주파수로 1,5625[Hz]이다.The synchronization between the subcarrier and the horizontal scan is the same as that of the NTSC, and when the subcarrier frequency is selected at an odd multiple of 1/2 of the horizontal scan frequency, it is equal between scan lines on the subcarrier phase of the (RY) component, so called a vertical blind called a venetian blind. Interference appears. Therefore, PAL method uses 1/4 line offset unlike NTSC method. Thus, the subcarrier frequency fp is fp = (284-1 / 4) fh + fh / 625 = 4.43 [MHz], where fh is 1,5625 [Hz] as the horizontal synchronization frequency.
제1도는 종래 부우스터단과 고주파변조단간의 매칭회로이다.1 is a matching circuit between a conventional booster stage and a high frequency modulation stage.
제1도를 참조하면, 재생된 오디오/비디오(Ain/Vin)를 고주파변조(IC3)에서 텔레비젼신호로 고주파변조하여 매칭회로(2)를 통해서 부우스터IC(1)로 출력한다. 이때, 상기 부우스터IC(1)는 매칭회로(2)를 통해서 입력받은 변조된 오디오/비디오(Ain/Vin)와 고주파입력단자(RFin)를 통해서 입력되는 고주파신호를 증폭하여 고주파출력단자(RFout)를 통해서 텔레비젼세트로 전송하거나 또는 비디오단자(TUout)를 통해서 비디오테이프레코더로 전송하게 되는 것이다. 상기 매칭회로(R1)는 콘덴서(C1)와 저항(R1)으로 구성되어 있다.Referring to FIG. 1, the reproduced audio / video Ain / Vin is subjected to high frequency modulation from a high frequency modulation IC3 to a television signal and output to the booster IC 1 through the matching circuit 2. At this time, the booster IC 1 amplifies a high frequency signal input through a modulated audio / video Ain / Vin and a high frequency input terminal RFin received through the matching circuit 2 and outputs a high frequency output terminal RFout. ), Or to a video tape recorder through a video terminal (TUout). The matching circuit R1 is composed of a capacitor C1 and a resistor R1.
그러나, 종래의 매칭회로는 단순히 신호손실만을 방지하기 위해서 구성된 것으로, 크로마비트성분을 고려하지 않았던 관계로 이 크로마비트에 의해서 화질이 현저히 떨어지는 문제점이 있었던 것이다.However, the conventional matching circuit is simply configured to prevent signal loss, and since the chroma bit component has not been considered, there is a problem that the image quality is significantly degraded by this chroma bit.
따라서, 본 발명의 목적은 상기와 같은 문제점을 해결하기 위하여 이루어진 것으로써, 부우스터단과 고주파변조단간에 크로마비트(Chroma beat) 주파수를 트랩시키는 기능을 갖는 부우스터단과 고주파변조단간의 매칭회로를 제공하는데 있다.Accordingly, an object of the present invention has been made to solve the above problems, and provides a matching circuit between a booster stage and a high frequency modulation stage having a function of trapping a chroma beat frequency between the booster stage and the high frequency modulation stage. It is.
본 발명은 다른 목적은 부우스터단과 고주파변조단간에 크로마비트(Chroma beat)주파수를 트랩시키는 기능을 갖는 부우스터단과 고주파변조단간의 매칭회로를 제공함에 의해서, 화질을 개선하도록함에 있다.Another object of the present invention is to improve image quality by providing a matching circuit between a booster stage and a high frequency modulation stage having a function of trapping a chroma beat frequency between the booster stage and the high frequency modulation stage.
상기한 목적을 달성하기 위한 수단으로써의 본 발명은 재생된 오디오/비디오신호(Ain/Vin)를 데이터(D)와 클럭신호(CLK)에 의해 텔레비젼신호로 고주파변조하는 고주파변조IC와, 고주파입력단자를 통해서 유입되는 고주파신호와 상기 고주파 변조IC에서 변조된 오디오/비디오신호(Ain/Vin)를 고주파출력단자 또는 비디오단자를 통해서 고주파신호로 출력하는 부우스터IC간의 매칭회로에 있어서,The present invention as a means for achieving the above object is a high frequency modulation IC for high frequency modulation of the reproduced audio / video signal (Ain / Vin) to a television signal by the data (D) and the clock signal (CLK), and a high frequency input In a matching circuit between a high frequency signal introduced through a terminal and a booster IC for outputting an audio / video signal (Ain / Vin) modulated by the high frequency modulation IC as a high frequency signal through a high frequency output terminal or a video terminal,
상기 부우스터IC과 고주파변조IC간에 콘덴서와 저항을 직렬로 접속구성하고, 상기 콘덴서에 코일을 병렬로 접속구성함을 특징으로한다.A capacitor and a resistor are connected in series between the booster IC and the high frequency modulation IC, and a coil is connected to the capacitor in parallel.
이하, 본 발명은 제2도를 참조하여 설명한다.Hereinafter, the present invention will be described with reference to FIG.
제2도는 본 발명에 따른 부우스터단과 고주파변조단간의 매칭회로이다.2 is a matching circuit between the booster stage and the high frequency modulation stage according to the present invention.
제2도를 참조하면, 1은 부우스터IC 이며, 이는 고주파입력단자(RFin)를 통해서 유입되는 고주파신호와, 고주파변조IC(3)에서 변조된 오디오/비디오신호(Ain/Vin)를 증폭하여 고주파출력단자(RFout)또는 비디오단자(TUout)를 통해서 고주파신호로 출력하는 고주파증폭부이다.Referring to FIG. 2, 1 is a booster IC, which amplifies a high frequency signal introduced through a high frequency input terminal RFin and an audio / video signal Ain / Vin modulated by the high frequency modulation IC 3. A high frequency amplification unit outputs a high frequency signal through a high frequency output terminal RFout or a video terminal TUout.
3은 고주파변조IC이며, 이는 재생된 오디오/비디오신호(Ain/Vin)를 데이터(D)와 클럭신호(CLK)에 의해 텔레비젼신호로 고주파변조하여 부우스터IC(1)로 출력하는 고주파변조부이다.3 is a high frequency modulation IC, which is a high frequency modulation unit for outputting the reproduced audio / video signal (Ain / Vin) to the booster IC (1) by performing high frequency modulation on the television signal by the data (D) and the clock signal (CLK). to be.
20은 매칭회로이며, 이는 부우스터IC(1)과 고주파변조IC(3)간에 콘덴서(C2)와 저항(R2)을 직렬로 접속구성하고, 상기 콘덴서(C2)에 코일(L2)을 병렬로 접속구성하는데, 상기 매칭회로(20)는 대략 4.43MHz정도인 크로마주파수(fp)를 트랩시키도록 콘덴서(C2)와, 코일(L2)로 트랩회로를 구성한다.20 is a matching circuit, in which a capacitor C2 and a resistor R2 are connected in series between the booster IC 1 and the high frequency modulation IC 3, and the coil L2 is connected in parallel to the capacitor C2. In the connection configuration, the matching circuit 20 constitutes a trap circuit with a capacitor C2 and a coil L2 to trap a chroma frequency fp of about 4.43 MHz.
이하 본 발명에 따른 작용 및 효과를 제2도를 참조하여 상세하게 설명한다.Hereinafter, the operation and effect according to the present invention will be described in detail with reference to FIG.
제2도를 참조하면, 만약 텔레비젼에서 빈채널로 설정하여두고, 고주파변조IC(3)에서 상기 텔레비젼의 빈채널로 맞추면, 상기 고주파변조IC(3)에서 재생되어 변조된 오디오/비디오신호(Ain/Vin)는 부우스터IC(1)를 통해서 텔레비젼세트로 출력되므로써, 상기 재생된 화면을 텔레비젼을 통해서 시청할 수 있게 된다.Referring to FIG. 2, if the television is set to the empty channel and the high frequency modulation IC 3 is set to the empty channel of the television, the audio / video signal (Ain) reproduced and modulated by the high frequency modulation IC 3 is modified. / Vin) is output to the television set via the booster IC 1, so that the reproduced screen can be viewed on the television.
상기와 같이 고주파변조IC(3)에서 텔레비젼신호로 변조된 오디오/비디오신호(Ain/Vin)는 매칭회로(20)를 통해서 부우스터IC(1)로 출력되고, 또한 크로마주파수에 의한 크로마비트성분은 매칭회로(20)에서 재거된다.The audio / video signal (Ain / Vin) modulated to the television signal by the high frequency modulation IC 3 as described above is output to the booster IC 1 through the matching circuit 20, and also the chroma bit component by the chroma frequency. Is removed from the matching circuit 20.
이를 구체적으로 설명하면, 부반송주파수라고도 불리우는 크로마주파수(fp)는 대략 4.43[MHz]로, 이는 음성반송주파수(fs=5.5[MHz])와의 간섭으로 크로마비트성부(5.5[MHz] -4.43[MHz]=1070[MHz])이 발생되는데, 이 크로마비트성분은 본 발명에 의한 매칭회로(20)내 콘덴서(C2)와 코일(L2)에 의한 트랩특성에 의해서 양호히 제거된다.In detail, the chroma frequency (fp), also called a subcarrier frequency, is approximately 4.43 [MHz], which is due to the interference with the voice carrier frequency (fs = 5.5 [MHz]). MHz] = 1070 [MHz]), and this chroma bit component is well removed by the trap characteristics of the capacitor C2 and the coil L2 in the matching circuit 20 according to the present invention.
상기 본 발명에 의한 매칭회로(20)내의 콘덴서(C2)와 코일(L2)에 의해서 트랩되는 주파수는 ft=1/(2πγL2C2)로, 이 트랩시키는 점을 상기 크로마비트성분의 주파수에 일치하도록 설정하면, 상기 크로마비트성분은 양호히 제거되어 깨끗한 화면을 획득 할 수 있게 되는 것이다.The frequency trapped by the capacitor C2 and the coil L2 in the matching circuit 20 according to the present invention is ft = 1 / (2πγL2C2), and the trapping point is set to match the frequency of the chroma bit component. In this case, the chroma bit component may be well removed to obtain a clear screen.
상술한 바와같은 본 발명은 부우스터단과 고주파변조단간에 크로마비트(Chroma beat)주파수를 트랩시키는 기능을 갖는 부우스터단과 고주파변조단간의 매칭회로를 제공함에 의해서 고주파신호 상호간에 발생되는 간섭현상이 양호하게 개선되고 이로인하여 노이즈성분이 최소화되어 양질의 TV화면을 얻을 수 있는 우수한 효과가 있는 것이다.As described above, the present invention provides good interference between the high frequency signals by providing a matching circuit between the booster stage and the high frequency modulation stage having a function of trapping chroma beat frequencies between the booster stage and the high frequency modulation stage. This is an excellent effect to obtain a good quality TV screen by improving the noise component is minimized thereby.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1019950021071A KR0147906B1 (en) | 1995-07-18 | 1995-07-18 | Booster and high modulated matching circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950021071A KR0147906B1 (en) | 1995-07-18 | 1995-07-18 | Booster and high modulated matching circuit |
Publications (2)
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KR970008856A KR970008856A (en) | 1997-02-24 |
KR0147906B1 true KR0147906B1 (en) | 1998-12-01 |
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KR1019950021071A KR0147906B1 (en) | 1995-07-18 | 1995-07-18 | Booster and high modulated matching circuit |
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KR (1) | KR0147906B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9147513B2 (en) | 2012-12-13 | 2015-09-29 | Samsung Electro-Mechanics Co., Ltd. | Series inductor array implemented as a single winding and filter including the same |
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1995
- 1995-07-18 KR KR1019950021071A patent/KR0147906B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9147513B2 (en) | 2012-12-13 | 2015-09-29 | Samsung Electro-Mechanics Co., Ltd. | Series inductor array implemented as a single winding and filter including the same |
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KR970008856A (en) | 1997-02-24 |
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