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KR900010908Y1 - Switching circuit of multimodal TV - Google Patents

Switching circuit of multimodal TV Download PDF

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Publication number
KR900010908Y1
KR900010908Y1 KR2019860018124U KR860018124U KR900010908Y1 KR 900010908 Y1 KR900010908 Y1 KR 900010908Y1 KR 2019860018124 U KR2019860018124 U KR 2019860018124U KR 860018124 U KR860018124 U KR 860018124U KR 900010908 Y1 KR900010908 Y1 KR 900010908Y1
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transistor
resistor
switching
multimodal
output
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KR880011002U (en
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장시호
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삼성전자 주식회사
한형수
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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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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Television Systems (AREA)

Abstract

내용 없음.No content.

Description

다방식 텔레비젼의 스위칭 회로Switching circuit of multimodal TV

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

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

5 : 스위칭부 10 : 차동증폭회로5: switching unit 10: differential amplifier circuit

15 : 출력부 Q1-Q4: 트랜지스터15: output part Q 1 -Q 4 : transistor

S1: 절환스위치 C1, C2: 콘덴서S 1 : selector switch C 1 , C 2 : condenser

R1-R14: 저항R 1 -R 14 : resistance

본 고안은 다방식 텔레비젼의 스위칭 회로에 관한 것이다.The present invention relates to a switching circuit of a multimodal television.

텔레비젼 방송에는 미주 지역에서 개발한 NTSC(National Television System)방식과 독일의 PAL(Phase Alternation by Line Cdor T.V System)방식등 여러 가지 전송 방식들이 있으며 유럽 지역의 경우 국가간의 교류가 많고 인접한 국가간에 서로 TV방송이 수신 가능하므로 PAL 및 SECAM방송을 모두 수신할 수 있는 다방식 텔레비젼이 요구되는 것이었다.There are various types of TV broadcasting such as NTSC (National Television System) developed in the Americas and Phase Alternation by Line Cdor TV System (PAL) in Germany. In Europe, there are many exchanges between countries and TV between neighboring countries. Since the broadcast could be received, a multimodal television capable of receiving both PAL and SECAM broadcasts was required.

본 고안의 목적은 PAL 및 SECAM방송 신호를 모두 처리할 수 있는 다방식 텔레비젼 회로에 있어서 절환스위치에 의하여 차동증폭 회로가 구동하여 원하는 방송의 시그널을 얻을 수 있는 다방식 텔레비젼의 스위칭 회로를 제공하고자 하는 것으로 절환스위치로 구성된 스위칭부와 서로 역구동하는 트랜지스터로서 구성된 차동증폭 회로와 차동증폭 회로의 신호를 출력시키는 출력부로 구성시켜 된 것이다.An object of the present invention is to provide a switching circuit of a multimodal television that can obtain a desired broadcast signal by driving a differential amplifier circuit by a switching switch in a multimodal television circuit capable of processing both PAL and SECAM broadcasting signals. It consists of a switching part composed of a switching switch and a differential amplification circuit configured as a reverse driving transistor and an output part for outputting a signal of the differential amplification circuit.

이를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.

본 고안은 저항(R1)(R2)과 연결된 트랜지스터(Q1)의 베이스측에 절환스위치(S1)를 통하여 접점(P)(S)과 연결되게 스위칭부(5)를 구성하고 SECAM 및 PAL방송 신호가 인가되는 입력단자(1)(2)에는 직류차단용 콘덴서(C1)(C2) 및 저항(R7)(R7)을 통하여 트랜지스터(Q2)(Q3)의 베이스측에 인가되게 구성시킨후 콜렉터 및 에미터측 저항(R3)(R8)이 서로 공접되게 차동증폭 회로(10)를 구성시킨다.The present invention configures the switching unit 5 to be connected to the contact (P) (S) through the switching switch (S 1 ) on the base side of the transistor (Q 1 ) connected to the resistor (R 1 ) (R 2 ) and SECAM And an input terminal (1) (2) to which a PAL broadcast signal is applied, through the DC blocking capacitor (C 1 ) (C 2 ) and the resistor (R 7 ) (R 7 ) of the transistor (Q 2 ) (Q 3 ). After being configured to be applied to the base side, the differential amplifier circuit 10 is configured such that the collector and emitter side resistors R 3 and R 8 are in common with each other.

그리고 트랜지스터(Q2)(Q3)의 콜렉터측에 연결된 출력부(15)가 저항(R5)(R9)(R11)(R12) 및 트랜지스터(Q4)로 구성되게 하여 출력단자(OUT)로 각 방송 신호가 출력되게 한 것이다.The output terminal 15 connected to the collector side of the transistors Q 2 and Q 3 is composed of a resistor R 5 , R 9 , R 11 , R 12 , and a transistor Q 4 . Each broadcast signal is output as (OUT).

여기서 차동증폭 회로(10)에서 트랜지스터(Q3)의 바이어스 전압이 트랜지스터 바이어스 전압보다 낮게 저항(R4)(R14)으로 설정하여 다른 조건이 없는한 트랜지스터(Q3)가 먼저 도통할 수 있게 구성한 것이다.Here, in the differential amplification circuit 10, the bias voltage of the transistor Q 3 is set lower than the transistor bias voltage to the resistor R 4 and R 14 so that the transistor Q 3 can conduct first unless there is another condition. It is made up.

이와 같이 구성된 본 고안에서 절환스위치(S1)가 도면과 같이 접점(P)에 연결되어 있는 경우 스위칭부(5)에 인가되는 전원(B+)이 저항(R1), 절환스위치(S1), 저항(R13)을 통하여 트랜지스터(Q1)의 베이스측에 인가되고 콜렉터측 저항(R2)을 통하여 전원(B+)이 인가되므로 트랜지스터(Q1)가 도통하여 차동증폭회로(10)의 트랜지스터(Q2)의 베이스측이 「L레벨」로 유지되어 트랜지스터(Q2)는 차단상태를 유지하게 되고 트랜지스터(Q2)와 역구동하는 트랜지스터(Q3)에는 저항(R3)(R4)을 통하여 콜렉터측과 베이스측에 전원(B+)이 인가되며 입력단자(2)에 인가되는 PAL방송 신호가 직류 차단용 콘덴서(C2)를 통하여 인가되므로 트랜지스터(Q3)가 도통되어 트랜지스터(Q3)의 콜렉터측에는 반전된 PAL방송신호가 출력되게 된다.In the present invention configured as described above, when the switching switch S 1 is connected to the contact point P as shown in the drawing, the power supply B + applied to the switching unit 5 is a resistor R 1 and the switching switch S 1. Is applied to the base side of the transistor Q 1 through the resistor R 13 and the power supply B + is applied through the collector side resistor R 2 so that the transistor Q 1 conducts and the differential amplification circuit 10 is applied. Of the transistor Q 2 of the transistor Q 2 is maintained at " L level " so that the transistor Q 2 is kept in a shut-off state, and the resistor R 3 is applied to the transistor Q 3 which is driven back with the transistor Q 2 . The power supply B + is applied to the collector side and the base side via (R 4 ), and the transistor Q 3 is applied because the PAL broadcast signal applied to the input terminal 2 is applied through the DC blocking capacitor C 2 . The inverted PAL broadcast signal is output to the collector side of the transistor Q 3 .

그리고 출력부(15)의 트랜지스터(Q4)의 콜렉터측은 저항(R5)을 통하여 전원(B+)이 공급되고 저항(R3)(R9)을 통하여 전원(B+)이 트랜지스터(Q4)의 베이스측에 항상 공급되므로 트랜지스터(Q4)는 항상 도통 상태를 유지하게 되는 것으로 트랜지스터(Q3)의 콜렉터측의 반전된 상태 신호가 출력부(15)의 트랜지스터(Q1)베이스측에 인가되므로 트랜지스터(Q4)의 콜렉터측에서 다시 반전된 원래의 PAL방송신호가 출력하게 된다.And the side of the collector of the transistor (Q 4) of the output section 15, a resistance (R 5) and the power (B +) is supplied through a resistor (R 3) (R 9) power supply (B +) of the transistors (Q through the 4) it is always supplied to the base side of the so transistor (Q 4) is always conducting the inverted state of the collector side of that transistor (Q 3) which keeps the status signal, the output unit 15 in the transistor (Q 1) base-side Since it is applied to, the original PAL broadcast signal inverted again on the collector side of transistor Q 4 is output.

그리고 SECAM 방송 수신시 절환스위치(S1)를 접점(S)에 접속시키면 트랜지스터(Q1)의 베이스측은 접지와 연결되어 스위칭부(5)의 트랜지스터(Q1)가 차단 상태를 유지하게 되고 저항(R2)을 통하여 인가되는 전원(B+)은 저항(R6)을 통하여 트랜지스터(Q2)의 베이스측에 인가되는 동시에 입력단자(1)에 인가되는 SECAM방송신호는 직류차단용 콘덴서(C1)와 저항(R7)을 통하여 트랜지스터(Q2)의 베이스측에 인가되므로 트랜지스터(Q2)는 도통하게 되고 이와 역구동하는 트랜지스터(Q3)가 차단 상태를 유지하게 된다.When the switching switch S 1 is connected to the contact point S when receiving the SECAM broadcast, the base side of the transistor Q 1 is connected to ground, so that the transistor Q 1 of the switching unit 5 maintains a blocking state, and The power source B + applied through R 2 is applied to the base side of the transistor Q 2 through the resistor R 6 , while the SECAM broadcast signal applied to the input terminal 1 is a DC blocking capacitor. Since it is applied to the base side of the transistor Q 2 through the C 1 ) and the resistor R 7 , the transistor Q 2 is turned on, and the transistor Q 3 , which is driven backward thereto, is kept in a blocked state.

따라서 SECAM방송신호가 트랜지스터(Q2)의 콜렉터측에서 반전된 후 전원(B+)에 의하여 항상 구동되는 출력부(15)의 트랜지스터(Q4)를 통하여 콜렉터측에서 재반전되어 출력단자(OUT)로 SECAM방송 신호가 출력하게 된다.Therefore, the SECAM broadcast signal is inverted at the collector side of the transistor Q 2 and then inverted at the collector side through the transistor Q 4 of the output unit 15 which is always driven by the power supply B + , thereby outputting the output terminal OUT. ) Will output SECAM broadcast signal.

이상에서와 같이 본 고안은 절환스위치(S1)의 절환유무에 따라 차동증폭회로(10)에 인가되는 각 방송 신호를 스위칭시켜 출력부로 출력되게 하여 사용자가 원하는 방송을 수신할 수가 있는 것으로 국가간의 교류가 많고 인접한 국가간에 텔레비젼 방송 수신이 가능한 유럽 지역에서 PAL 및 SECAM방송을 간단히 절환 수신할 수 있는 효과가 있는 것이다.As described above, according to the present invention, it is possible to switch the broadcasting signals applied to the differential amplification circuit 10 according to whether the switching switch S 1 is switched and output them to an output unit so that a user can receive a desired broadcast. In Europe, where there is a lot of exchange and TV reception is possible between neighboring countries, PAL and SECAM broadcasting can be easily switched.

Claims (1)

트랜지스터(Q1)의 베이스측에 절환스위치(S1)를 연결시켜 스위칭부(5)를 구성하고 SECAM 및 PAL방송 신호가 콘덴서(C1)(C2) 및 저항(R7)(R8)을 통하여 저항(R3)(R8)을 통하여 콜렉터측 및 에미터측이 공접된 트랜지스터(Q2)(Q3)의 베이스측에 인가되는 차동증폭회로(10)를 구성시킨 후 트랜지스터(Q2)(Q3)의 콜렉터측에 출력부(15)를 연결시켜된 다방식 텔레비젼의 스위칭 회로.Switching switch S 1 is connected to the base side of transistor Q 1 to form a switching unit 5, and the SECAM and PAL broadcast signals are condenser C 1 (C 2 ) and resistor R 7 (R 8 ). After forming the differential amplifier circuit 10 applied to the base side of the transistor (Q 2 ) (Q 3 ) and the collector side and the emitter side through the resistor (R 3 ) (R 8 ) through the transistor (Q) 2 ) A switching circuit of a multi-mode television set by connecting an output unit 15 to the collector side of (Q 3 ).
KR2019860018124U 1986-11-21 1986-11-21 Switching circuit of multimodal TV Expired KR900010908Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860018124U KR900010908Y1 (en) 1986-11-21 1986-11-21 Switching circuit of multimodal TV

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860018124U KR900010908Y1 (en) 1986-11-21 1986-11-21 Switching circuit of multimodal TV

Publications (2)

Publication Number Publication Date
KR880011002U KR880011002U (en) 1988-07-29
KR900010908Y1 true KR900010908Y1 (en) 1990-12-08

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Application Number Title Priority Date Filing Date
KR2019860018124U Expired KR900010908Y1 (en) 1986-11-21 1986-11-21 Switching circuit of multimodal TV

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KR880011002U (en) 1988-07-29

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