KR900001337Y1 - Rf distributer of multi-channel screen tv - Google Patents

Rf distributer of multi-channel screen tv Download PDF

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Publication number
KR900001337Y1
KR900001337Y1 KR2019860011549U KR860011549U KR900001337Y1 KR 900001337 Y1 KR900001337 Y1 KR 900001337Y1 KR 2019860011549 U KR2019860011549 U KR 2019860011549U KR 860011549 U KR860011549 U KR 860011549U KR 900001337 Y1 KR900001337 Y1 KR 900001337Y1
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KR
South Korea
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output
input
transformer
core
connection point
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KR2019860011549U
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Korean (ko)
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KR880003657U (en
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이기봉
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대우전자주식회사
김용원
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Priority to KR2019860011549U priority Critical patent/KR900001337Y1/en
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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
    • 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
    • H04N5/50—Tuning indicators; Automatic tuning control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

내용 없음.No content.

Description

다중채널 화면 텔레비젼의 RF 분배기Multichannel Screen TV, RF Splitter

제1도는 종래의 다중 채널 화면 텔레비젼의 RF 분배 회로도.1 is an RF distribution circuit diagram of a conventional multi-channel screen television.

제2도는 제1도의 종래의 RF 분배회로가 채용된 분배기의 사시도.2 is a perspective view of a distributor employing the conventional RF distribution circuit of FIG.

제3도는 본 고안의 실시 회로도.3 is an implementation circuit diagram of the present invention.

제4도는 제3도의 실시예인 분배기의 사시도.4 is a perspective view of a dispenser that is the embodiment of FIG.

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

1,11 : 입력단자 2 : 분배트랜스1,11: Input terminal 2: Distribution transformer

2a,12a,12b : 입력권선 2b,2c,13a,13b : 출력권선2a, 12a, 12b: input winding 2b, 2c, 13a, 13b: output winding

2d,12c,13c : 코아 3,4,14,15 : 출력단자2d, 12c, 13c: Core 3, 4, 14, 15: Output terminal

12 : 입력트랜스 13 : 출력트랜스12: input transformer 13: output transformer

A,B : 접속점A, B: connection point

본 고안은 다중 채널화면 텔레비젼의 RF 분배기에 관한 것으로 특히 손실 특성을 향상시킨 다중 채널화면 텔레비젼의 RF 분배기에 관한 것이다.The present invention relates to an RF splitter of a multichannel screen television, and more particularly, to an RF splitter of a multichannel screen television having improved loss characteristics.

종래의 RF 분배기는 제1도 및 제2도에 도시된 바와 같이 안테나로부터 수신한 RF 신호를 전송간선을 통하여 입력단자(1)에 인가시키고 이중 한개의 코아(2d)에 감긴 입력권선(2a)으로 인가 받아서, 상기 코아(2d)에 각각 감긴 2개의 출력권선(2b)(2c)을 통하여 각각 출력단자(3), (4)에 접속된 튜너에 입력시킨다.The conventional RF splitter applies an RF signal received from an antenna to the input terminal 1 through a transmission line as shown in FIGS. 1 and 2, and the input winding 2a wound around one core 2d. Is applied to the tuner connected to the output terminals 3 and 4, respectively, via two output windings 2b and 2c wound around the core 2d.

이 때문에 일측 출력권선에 접속된 튜너에서의 국부발진신호의 누전 및 분배기측으로 되반사되는 신호등이 동일 코아상에서 상호 간섭이 발생될 뿐만 아니라 이로 인하여 입력신호 레벨에 대해서 출력신호 레벨의 6dB정도의 손실이 야기되며 VHF대 및 UHF대의 넓은 영역의 주파수에 대하여 평탄한 특성을 얻기가 어려웠다.As a result, the leakage of local oscillation signal from the tuner connected to one output winding and the signal reflecting back to the splitter side cause mutual interference on the same core. It is difficult to obtain flat characteristics for frequencies in a wide range of the VHF band and the UHF band.

본 고안의 목적은 이와같은 문제점을 개선시킨 저손실의 주파수 특성이 양호한 다중채널 화면 텔레비젼의 RF 분배기를 제공하는데 있다.An object of the present invention is to provide an RF splitter of a multi-channel screen television having good low loss frequency characteristics which has improved such a problem.

상기 목적을 달성하기 위하여 본 고안은 별개의 코아로 된 입력 트랜스와 출력트랜스를 구비하고 상기 코아들에 특정권선 수로 권선을 감아서 된 것을 특징으로 하는 것으로 이하 제3도 및 제4도를 참조하여 상세히 설명하면 다음과 같다.In order to achieve the above object, the present invention has an input transformer and an output transformer made of separate cores, and a winding of a specific winding channel wound around the cores. Referring to FIGS. 3 and 4 below. It will be described in detail as follows.

제3도는 본 고안의 실시회로도로서 입력단자(11)에 접속되고 입력코아(12c)에 2회 감긴 권선(12a)와 일단이 접지되고 입력코아(12c)에 4회 감긴 권선(12b)의 타단을 접속점(A)에 공접시켜서 입력트랜스(12)를 구성시키고, 출력단자(14),(15)에 그 일단이 각각 접속되고 출력코아(13c)에 1회씩 감겨진 권선(13a),(13b)의 타단을 접속점(B)에 공접시켜서 출력트랜스(13)을 구성시키며, 상기 입력단자(11)와 접지 사이에 콘덴서(C)를 접속시키고 상기 접속점(A)과 접속점(B)을 접속시키고 그 접속점과 접지사이에 콘덴서(C2)를 접속시키며 상기 두 출력단자(14),(15)사이에 저항(R)을 접속시켜서 구성시킨 것이다.3 is an implementation circuit diagram of the present invention, the other end of the winding 12a connected to the input terminal 11 and wound twice on the input core 12c and one end of which is grounded and wound four times on the input core 12c. To the connection point A to form the input transformer 12, one end of which is connected to the output terminals 14 and 15, respectively, and wound once on the output core 13c, and the windings 13a and 13b. The output end 13 is formed by making the other end of the () joint to the connection point B, and the condenser C is connected between the input terminal 11 and the ground, and the connection point A and the connection point B are connected. The capacitor C 2 is connected between the connection point and the ground, and the resistor R is connected between the two output terminals 14 and 15.

이와같이 구성된 본 고안에서는 입력단자(11)에 안테나로부터 수신된 TV 신호가 입력되고 이 입력신호는 입력트랜스(12)에서 임피던스 변환되어 출력트랜스(13)의 접속점(B)에 전하여지며 이 신호는 출력트랜스(13)에서 동일 권선수의 권선(13a)(13b)을 통하여 분기되어 출력단자(14)(15)에 접속된 각 튜너로 출력된다.According to the present invention configured as described above, the TV signal received from the antenna is input to the input terminal 11, and the input signal is impedance-converted at the input transformer 12 and transmitted to the connection point B of the output transformer 13, and the signal is output. The transformer 13 branches through the windings 13a and 13b of the same number of windings and is output to each tuner connected to the output terminals 14 and 15.

여기서 저항(R)은 전력 흡수용 저항으로서 두 출력단자간의 상호간섭을 방지하며 넓은 주파수 대역에서 평탄한 주파수 특성을 가지도록 한다.The resistor R is a power absorption resistor that prevents mutual interference between the two output terminals and has a flat frequency characteristic in a wide frequency band.

이와같이 입력트랜스(12)와 출력트랜스(13)를 별개의 코아를 사용하여 각각 특정 권선수로 구성시킬 경우 각 권선수에 있어서 입력신호 레벨에 대한 출력신호 레벨의 손실은 다음 표1과 같다.As such, when the input transformer 12 and the output transformer 13 are configured with a specific number of windings using separate cores, the loss of the output signal level with respect to the input signal level in each winding number is shown in Table 1 below.

[표 1]TABLE 1

상기 표 1에서와 같이 입력트랜스(12)에 있어서 입력단자(12c)에 권선(12a)(12b)을 2T-4T 감고 출력트랜스(13)에 있어서는 출력코아(13c)에 권선(13a)(13b)을 1T-1T감았을 경우에 손실특성이 각각 -3.1dB, -3.2dB로서 가장 개선된 권선수임을 알 수 있다.As shown in Table 1, the windings 12a and 12b are wound on the input terminal 12c in the input transformer 12, 2T-4T, and the windings 13a and 13b in the output core 13c in the output transformer 13. ), The loss characteristics are -3.1dB and -3.2dB respectively, which is the most improved number of turns.

이와같이 본 고안의 RF 분배기에 있어서는 그 구조적 특성으로 신호의 상호간섭을 배제시킬 수 있을뿐만 아니라 저손실 특성과 VHF, UHF대의 넓은 주파수 특성으로 전송품질을 향상시킬 수 있다.Thus, in the RF divider of the present invention, the structural characteristics can not only eliminate the interference of signals, but also improve the transmission quality with low loss characteristics and wide frequency characteristics of the VHF and UHF bands.

Claims (1)

입력단자(11)와 한쌍의 출력단자(14)(15), 입력트랜스(12)와 출력트랜스(13)를 구비하며, 일단이 상기 입력단자(11)에 접속되고 입력코아(12c)에 2회 감긴 권선(12a)과 일단이 접지되고 입력코아(12c)에 4회 감긴 권선(12b)의 타단을 접속점(A)에 공접시켜서 입력트랜스(12)를 구성시키고 출력단자(14),(15)에 일단이 각각 접속되고 출력코아(13c)에 1회씩 감겨진 권선(13a),(13b)의 타단을 접속점(B)에 공접시켜서 출력트랜스(13)를 구성시키며 상기 접속점(A)(B)를 접속시키고 그 접속점과 접지사이에 콘덴서(C2)를 접속시키고, 상기 출력단자(14),(15)사이에 저항을 접속시켜서 구성시킨 것을 특징으로 하는 다중채널 화면 텔레비젼의 RF 분배기.It has an input terminal 11 and a pair of output terminals 14 and 15, an input transformer 12 and an output transformer 13, one end of which is connected to the input terminal 11 and is connected to the input core 12c. The winding 12a and one end are grounded, and the other end of the winding 12b wound four times on the input core 12c is joined to the connection point A to form the input transformer 12, and the output terminals 14, 15 ) And the other end of the windings 13a and 13b wound one time on the output core 13c and making the output transformer 13 co-connect with the connection point B. And a capacitor (C 2 ) between the connection point and ground, and a resistor connected between the output terminals (14) and (15).
KR2019860011549U 1986-07-31 1986-07-31 Rf distributer of multi-channel screen tv KR900001337Y1 (en)

Priority Applications (1)

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KR2019860011549U KR900001337Y1 (en) 1986-07-31 1986-07-31 Rf distributer of multi-channel screen tv

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Application Number Priority Date Filing Date Title
KR2019860011549U KR900001337Y1 (en) 1986-07-31 1986-07-31 Rf distributer of multi-channel screen tv

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KR880003657U KR880003657U (en) 1988-04-14
KR900001337Y1 true KR900001337Y1 (en) 1990-02-20

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