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KR900003407Y1 - 3 band tuner circuit - Google Patents

3 band tuner circuit Download PDF

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Publication number
KR900003407Y1
KR900003407Y1 KR2019860014681U KR860014681U KR900003407Y1 KR 900003407 Y1 KR900003407 Y1 KR 900003407Y1 KR 2019860014681 U KR2019860014681 U KR 2019860014681U KR 860014681 U KR860014681 U KR 860014681U KR 900003407 Y1 KR900003407 Y1 KR 900003407Y1
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South Korea
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signal
signal processing
band
capacitor
processing unit
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KR2019860014681U
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Korean (ko)
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KR880007106U (en
Inventor
이규안
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삼성전자 주식회사
한형수
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Priority to KR2019860014681U priority Critical patent/KR900003407Y1/en
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Publication of KR900003407Y1 publication Critical patent/KR900003407Y1/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
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • 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)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

내용 없음.No content.

Description

3밴드 튜너회로3-band tuner circuit

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

제2도는 6조식 바리콘의 사시도.2 is a perspective view of a six-barrier barricon.

제3도는 6조식 바리콘의 내부 회로도.3 is an internal circuit diagram of a six-barrier barricon.

제4도는 4조식 바리콘의 사시도.4 is a perspective view of a four-barrier barricon.

제5도는 오디오기기에 널리 사용되고 있는 4조식 바리콘의 내부 회로도.5 is an internal circuit diagram of a four-barrier barricon widely used in audio equipment.

제6도는 본 고안에 사용되는 4조식 바리콘의 내부 회로도.6 is an internal circuit diagram of a four-barrier barricon used in the present invention.

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

1, 2 : 밴드 패스 필터 IC1: FM 신호 처리용 집적소자1, 2: band pass filter IC 1 : integrated signal processing FM signal

IC2: TV 신호처리용 집적소자 10 : FM 신호 처리부IC 2 : TV signal processing integrated device 10: FM signal processing unit

20 : AM 신호 처리부 30 : 신호 처리부20: AM signal processor 30: signal processor

40 : 버퍼용 앰프 FC1: FC4: 페이딩 콘덴서40: buffer amplifier FC 1 : FC 4 : fading capacitor

VC1, VC4: AM용 가변콘덴서 VC3, VC4: TV용 가변 콘덴서VC 1 , VC 4 : Variable capacitor for AM VC 3 , VC 4 : Variable capacitor for TV

TC1, TC2: FM용 트리머 콘덴서 TC101,TC102: AM용 트리머 콘덴서TC 1 , TC 2 : FM trimmer capacitor TC 101 , TC 102 : AM trimmer capacitor

TC3, TC4: TV용 트리머 콘덴서 L1, L2: FM 용 코일TC 3 , TC 4 : TV trimmer condenser L 1 , L 2 : FM coil

L3, L4: TV용 코일 D1, D2: 가변용량 다이오드L 3 , L 4 : Coil for TV D 1 , D 2 : Variable capacitance diode

D3, D4: 다이오드 R1- R3: 저항D 3 , D 4 : Diode R 1 -R 3 : Resistance

T1: FM 중간 주파 트랜스 T2: TV중간 주파 트랜스T 1 : FM intermediate frequency transformer T 2 : TV intermediate frequency transformer

X : FM·TV 세라믹 필터 Q : 트랜지스터X: FM-TV ceramic filter Q: Transistor

S1- S3: 스위치 T11, T12: AM용 트랜스S 1 -S 3 : Switch T 11 , T 12 : Transformer for AM

본 고안은 AM/FM/TV 밴드를 수신하는 3밴드 튜너회로에 관한 것이다.The present invention relates to a three-band tuner circuit for receiving AM / FM / TV bands.

종래의 오디오 수신기는 제4도에 그외관이 도시되고 제5도에 내부 회로도가 표시된 2밴드용 4조식 바리콘을 이용하여 AM 및 FM의 2밴드 신호를 처리하였으나 점차 상기의 AM/FM밴드 이외에 TV의 VHF밴드까지 수신할 수 있는 수신 장치가 개발되어 AM/FM/TV밴드 수신을 위하여 제2도에 그외관이 도시되고 제3도에 내부 회로도가 표시된 3밴드용 6조식 바리콘이 이용되었다.Conventional audio receivers process two-band signals of AM and FM using two band four-barrier baricons, which are shown in FIG. 4 and the internal circuit diagram in FIG. A receiving device capable of receiving up to VHF band was developed. For the AM / FM / TV band reception, a 3-band 6-barrier barricon was used for the external appearance of FIG. 2 and the internal circuit diagram of FIG.

즉 AM/FM/TV 수신 장치에 있어서, 종래에는 제3도에서와 같이 6조식 바리콘을 사용하여 3밴드를 모두 수신하였으나 이같은 6식 바리콘은 설계 구성의 어려움이 있으며 또한 새로운 부품의 개발에 따른 원가 상승의 요인이 되어 대외 경쟁력이 약화되는 원인이 되는 것이다That is, in the AM / FM / TV receiver, conventionally, as shown in FIG. 3, all three bands are received by using six-barrier barricades, but such six-barricades have difficulty in designing and cost due to the development of new parts. It is the cause of the increase, which causes the weakness of external competitiveness.

본 고안은 상기와 같은 점을 감안하여 기존의 AM/FM 수신기에 널리 보급되어 사용되는 2밴드용 4조식 바리콘의 트리머 콘덴서만 분리하여 AM/FM/TV 의 3밴드를 모두 수신할 수 있는 3밴드 튜너 회로를 제공하고자 한 것이다.In consideration of the above, the present invention separates the trimmer capacitor of the 4-band barricon for 2-band, which is widely used in the existing AM / FM receiver, and is capable of receiving all three bands of AM / FM / TV. It is intended to provide a tuner circuit.

이와 같이 4조식 바리콘을 이용하여 AM/FM/TV의 3밴드를 모두 수신할 수 있도록 하는 본 고안을 첨부 도면에 의거 상세히 설명하면 다음과 같다.As described above, the present invention for receiving all three bands of AM / FM / TV using four-barrier barricone will be described in detail with reference to the accompanying drawings.

제1도는 본 고안의 회로도로서 로우드 안테나(RA)에 밴드패스 필터(1) (2)를 통하여 각각 FM신호 처리용 집적소자(IC1) 및 TV신호 처리용 집적소자(IC2)가 연결되게 구성한 후 상기의 FM신호 처리용 집적소자(IC1) 와 TV신호 처리용 집적소자 (IC2)에는 각각 콘덴서, 인덕턴스코일, 가변용량 다이오드(D1),( D2)로 구성된 FM 신호 처리부(10) 및 TV 신호 처리부(30)를 연결하며 상기 FM신호 처리부(10)에 연결된 AM용 가변콘덴서(VC1)(VC2)와 밴드 선택 스위치(S1)(S2)를 통하여 AM용 트리머 콘덴서(TC101)(TC102)와 AM용 트랜스(T11)(T12)가 연결되게 AM 신호 처리부(20)를 구성한다.FIG. 1 is a circuit diagram of the present invention, in which an FM signal processing integrated device (IC 1 ) and a TV signal processing integrated device (IC 2 ) are connected to a low antenna (RA) through a band pass filter (1) and (2), respectively. After the configuration, the FM signal processing integrated device (IC 1 ) and TV signal processing integrated device (IC 2 ) of the FM signal processing unit consisting of a capacitor, an inductance coil, a variable capacitance diode (D 1 ), (D 2 ), respectively An AM variable capacitor VC 1 (VC 2 ) and a band selection switch S 1 (S 2 ) connected to the FM signal processing unit 10 and connected to the TV signal processor 30. The AM signal processor 20 is configured to connect the trimmer capacitor TC 101 (TC 102 ) and the AM transformer T 11 (T 12 ).

이때 상기 밴드 선택스위치(S1)(S2)와 연동되는 밴드 선택 스위치(S3)는 FM과 TV 및 AM밴드 선택시 전원 공급을 제어하게 된다.In this case, the band selection switch S 3 interlocked with the band selection switch S 1 and S 2 controls the power supply when the FM, TV and AM bands are selected.

그리고 상기된 FM 신호 처리부(10) 및 TV신호 처리부(30)에는 4조직 바리콘의 트리머 콘덴서(TC1- TC4) 및 가변콘덴서(VC1- VC4)를 연결 구성시킨후 연동되는 밴드 선택 스위치(S1)(S2)(S3)를 통하여 페이딩 콘덴서(FC1-FC4)와 연결되게 구성시키고 FM신호 처리용 집적 소자(IC1)와 TV 신호 처리용 집적소자(IC2)의 중간 주파 신호는 중간주파 트랜스(T1)(T2)의 2차측에서 역방향 저지용 다이오드 (D3)(D4)를 통한 후 바이어스 저항(R1-R3)과 연결된 트랜지스터(Q)를 통하여 세라믹 필터(X)에 인가되게 버퍼용 앰프(40)를 구성시켜 된 것이다.In addition, the FM signal processing unit 10 and the TV signal processing unit 30 are connected to the trimmer capacitor TC 1 -TC 4 and the variable capacitor VC 1 -VC 4 of the four-barrier structure and the band selection switch to be interlocked. It is configured to be connected to the fading capacitors FC 1 -FC 4 through (S 1 ) (S 2 ) (S 3 ) and the integrated signal for FM signal processing device IC 1 and TV signal processing integrated device IC 2 . The intermediate frequency signal passes through the reverse blocking diode (D 3 ) (D 4 ) on the secondary side of the intermediate frequency transformer (T 1 ) (T 2 ) and then receives the transistor (Q) connected to the bias resistors (R 1 -R 3 ). The buffer amplifier 40 is configured to be applied to the ceramic filter X through the filter.

제2도는 6조식 바리콘의 사시도로서 그 바리콘의 내부 회로도는 제3도와 같이 FM, AM, TV용 가변 콘덴서와 트리머 콘덴서로 구성된 것을 나타내는 것으로 종래에는 이와 같은 3밴드 처리용 바리콘을 이용하여 AM/FM/TV 밴드를 수신하였다.FIG. 2 is a perspective view of a six-barrier barricon, and the internal circuit diagram of the barricon is composed of a variable capacitor and a trimmer capacitor for FM, AM, and TV as shown in FIG. 3. Conventionally, such a three-band processing barricon is used for AM / FM. Received the / TV band.

제4도는 4조식 바리콘의 사시도로써 내부 회로는 제5도와 같이 FM용과 AM용 가변콘덴서와 트리머 콘덴서로 나타내는 것으로 본 고안은 이같은 4조식 바리콘을 이용하여 AM/FM/TV의 3밴드를 처리할 수 있도록 제6도와 같이 변형시켜 4조식 바리콘의 2조는 TV용으로 나머지 2조는 AM, FM 공통으로 사용할 수 있게 구성시킨 것이다.4 is a perspective view of a four-barrier barricon, and the internal circuit is represented by a variable capacitor and a trimmer capacitor for FM and AM as shown in FIG. 5. The present invention can process three bands of AM / FM / TV using such four-barrier barricon. As shown in FIG. 6, two sets of four-barrier baricons are used for TV, and the other two sets can be used for AM and FM in common.

이와 같이 구성된 본 고안은 AM신호처리부 (20)는 AM신호를 처리하며 FM처리부(10)는 FM신호 처리용 집적소자(IC1)에서 처리하고 TV 신호처리부(30)는 TV신호 처리용 집적소자(IC2)에서 각기 콘덴서 및 인덕턴스로 구성되는 공진 회로의 공진 주파수를 이용하여 신호처리를 행하는 것으로 밴드선택 스위치(S1)(S2)(S3)에 의하여 원하는 밴드를 선택할 때 종래의 6조식 바리콘의 3밴드 튜너와 동일하게 각각의 밴드를 선택할 수 있다.According to the present invention configured as described above, the AM signal processor 20 processes the AM signal, the FM processor 10 processes the FM signal processing integrated device IC 1 , and the TV signal processor 30 processes the TV signal processing integrated device. The signal processing is performed by using the resonant frequency of the resonant circuit composed of the capacitor and the inductance in (IC 2 ), and when the desired band is selected by the band selection switch S 1 (S 2 ) (S 3 ) 6 Each band can be selected to match the three-band tuner on the breakfast baricone.

이와같이 구성된 고안을 첨부한 제1도를 참조하여 상세히 설명하면, 방송 주파수 신호(RF)가 로우드 안테나(RA)를 통하여 입력되어지면 밴드 패스 필터(1), (2)를 통하여 FM신호처리용 집적 소자(IC1)에 입력되어지고 TV신호는 TV신호 처리용 집적소자(IC2)에 입력 되어지며 AM신호는 AM용 가변콘덴서(VC1) (VC2)에 입력되어진다.Referring to FIG. 1 attached to the present invention, the broadcast frequency signal RF is inputted through the loudspeaker RA, and the band pass filters 1 and 2 are used for FM signal processing. The TV signal is input to the integrated device IC 1 , the TV signal is input to the TV signal processing integrated device IC 2 , and the AM signal is input to the AM variable capacitor VC 1 (VC 2 ).

여기서 AM용 가변콘덴서(VC1)(VC2)는 FM신호 처리시에도 공통으로 사용되고 있으나 종래의 FM용 바리콘에 비해 낮은 주파수를 공진할 수 있도록 용량을 매우 크게 설정하였으므로 FM수신시에는 페이딩 콘덴서(FC1)(FC2)를 사용하여 FM주파수대에 알맞은 용량 변화를 할 수 있는 범위로 선정하면 밴드 선택 스위치(S1)(S2)(S3)가 FM의 위치일 경우 AM용 가변 콘덴서(VC1)(VC2)는 FM수신 주파수를 변경하여 수신 가능하도록 하고 밴드 선택 스위치(S1)(S2)(S3)가 AM신호 위치시에는 종래의 AM 수신 방식과 동일한 회로로 구성되므로 방송을 수신하게 된다.Here, the AM variable capacitor VC 1 (VC 2 ) is commonly used in FM signal processing, but the capacitance is set very large so as to resonate a lower frequency than conventional FM variicons. If you select the range that can change the capacity appropriate to the FM frequency band using FC 1 ) (FC 2 ), if the band selection switch (S 1 ) (S 2 ) (S 3 ) is the position of FM, the variable capacitor for AM ( VC 1 ) (VC 2 ) changes the FM reception frequency so that reception is possible, and when the band selection switch S 1 (S 2 ) (S 3 ) is positioned at the AM signal, it is composed of the same circuit as the conventional AM reception method. You will receive a broadcast.

여기서 밴드 선택스위치(S1)(S2)가 FM 위치일 경우를 살펴보면, 밴드 패스 필터(1)를 통한 FM 및 AM신호가 신호 처리용 집적소자(IC1)에 입력되어지며 이때 밴드 선택 스위치(S3)가 FM위치에서 선택되므로 FM신호처리부(10)에만 전원이 공급되어지고 TV신호 처리부(30) 및 AM신호 처리부(20)에는 전원이 공급되지 않아 FM신호 처리부(10)만 동작되게 된다.In the case where the band selection switch S 1 (S 2 ) is the FM position, the FM and AM signals through the band pass filter 1 are input to the signal processing integrated device IC 1 . Since S 3 is selected at the FM position, power is supplied only to the FM signal processing unit 10 and only the FM signal processing unit 10 is operated because no power is supplied to the TV signal processing unit 30 and the AM signal processing unit 20. do.

그리고 밴드 선택 스위치(S1)(S2)에 연결된 AM용 가변 콘덴서(VC1)(VC2)는 페이딩 콘덴서(FC1)(FC2)와 미세 조정을 위한 트리머 콘덴서(TC1)(TC2) 및 코일(L1)(L2)등과 연결되어 FM 신호 처리용 집적소자(IC1)에서 FM 의 신호를 처리할 수 있는 공진 주파수를 형성하여 주므로써 FM 신호 처리용 집적소자(IC1)에서는 FM중간주파 트랜스(T1)에 FM중간 주파신호를 출력시키게 되고 트랜스(T1)의 이차측을 유기된 FM 중간 주파신호는 역방향 저지용 다이오드(D3)를 통한후 버퍼앰프(40)의 트랜지스터(Q)를 통하여 세라믹 필터(X)를 통하여 FM중간 주파 앰프로 인가되게 되므로서 FM신호가 선택되어지게 된다.The variable capacitor (VC 1 ) (VC 2 ) for AM connected to the band select switch (S 1 ) (S 2 ) is a fading capacitor (FC 1 ) (FC 2 ) and a trimmer capacitor (TC 1 ) (TC for fine adjustment. 2 ) and the coil (L 1 ) (L 2 ) is connected to the FM signal processing integrated device (IC 1 ) to form a resonant frequency capable of processing the FM signal by processing the FM signal integrated device (IC 1 ) Outputs the FM intermediate frequency signal to the FM intermediate frequency transformer (T 1 ), and the FM intermediate frequency signal derived from the secondary side of the transformer (T 1 ) passes through the reverse blocking diode (D 3 ) and then the buffer amplifier (40). The FM signal is selected by being applied to the FM intermediate frequency amplifier through the ceramic filter X through the transistor Q.

이같은 FM신호 출력중에는 TV신호 처리부(30)에 전원이 인가되지 않아 동작되지 않게 되므로 TV신호가 출력되지 않아 FM 신호와 이중 출력이 되지 않으며, 또한 역방향 저지용 다이오드(D4)에 의하여 FM신호가 TV신호 처리부(30)의 영향을 받지 않고 출력되게 된다.During the FM signal output, the TV signal processing unit 30 does not operate because power is not applied. Therefore, the TV signal is not output and the FM signal is not dual output, and the FM signal is prevented by the reverse blocking diode D 4 . It is output without being affected by the TV signal processor 30.

한편, 밴드 선택스위치(S1)(S2)(S3)가 TV위치일 경우에는 밴드 선택스위치(S3)의 TV위치 절환으로 FM신호 처리부(10)와 AM신호 처리부(20)에는 전원이 공급되지 않아 동작되지 않게 되고 TV신호 처리부(30)만 전원이 공급되어 동작되게 된다.On the other hand, when the band selection switch (S 1 ) (S 2 ) (S 3 ) is the TV position, the power supply is supplied to the FM signal processing unit 10 and the AM signal processing unit 20 by switching the TV position of the band selection switch S 3 . This is not supplied because it is not operated, only the TV signal processing unit 30 is supplied with power to operate.

이같이 밴드선택 스위치(S1)(S2)(S3)를 TV위치로 절환시키면 TV 신호 처리부(30)에만 전원이 공급되므로 로우드 안테나(RA)를 통하여 수신되는 방송 주파수 신호(RF)는 밴드 패스 필터(2)를 통하여 TV 신호 대역만 TV 신호용 집적소자(IC2)에 입력 되어진다.When the band selection switch (S 1 ) (S 2 ) (S 3 ) is switched to the TV position, power is supplied only to the TV signal processing unit 30, so that the broadcast frequency signal RF received through the loud antenna RA is Only the TV signal band is input to the TV signal integrated device IC 2 through the band pass filter 2.

따라서, TV의 공진 주파수를 형성할 수 있도록 구성되어진 TV 용 가변 콘덴서(VC3)(VC4)와 채널의 미세 조정을 위한 트리머 콘덴서(TC3)(TC4)와 페이딩 콘덴서(FC3)(FC4) 및 TV 용 코일(L3)(L4)등으로 구성된 공진 회로에 의하여 TV의 중간 주파 트랜스(T2)에는 TV 중간 주파 신호가 인가되게 한다.Therefore, the variable capacitor VC 3 (VC 4 ) for the TV configured to form a resonant frequency of the TV, the trimmer capacitor TC 3 (TC 4 ) and the fading capacitor FC 3 ( The TV intermediate frequency signal is applied to the intermediate frequency transformer T 2 of the TV by a resonant circuit composed of FC 4 ), a coil L 3 , and an L 4 for TV.

그리고 트랜스(T2)의 2차측으로 유기된 TV 중간 주파신호는 역방향 저지용 다이오드(D4)를 통하고 버퍼 앰프(40)의 트랜지스터(Q)를 통한 후 세라믹 필터(X)를 통하여 TV 중간 주파 앰프에 인가되게 되므로써 TV 신호가 선택되어지게 된다.The TV intermediate frequency signal induced to the secondary side of the transformer T 2 passes through the reverse blocking diode D 4 , through the transistor Q of the buffer amplifier 40, and then through the ceramic filter X. The TV signal is selected by being applied to the frequency amplifier.

이같은 TV 신호 출력중에는 FM신호 처리부(10)에 전원이 인가되지 않아 동작되지 않으므로 FM신호가 출력되지 않아 TV 신호와 이중 출력이 되지 않으며 또한 역방향 저지용 다이오드(D3)에 의하여 TV 신호가 FM신호 처리부(10)의 영향을 받지 않고 출력되게 된다.During the TV signal output, the FM signal processing unit 10 does not operate because no power is applied. Therefore, the FM signal is not output and the TV signal is not dual output. Also, the TV signal is prevented by the reverse blocking diode D 3 . It is output without being affected by the processing unit 10.

한편, 본 고안의 FM TV OUT로 표시되는 단자는 FM 및 TV의 신호 출력단자가 아니고 중간 주파 앰프의 출력단자에 연결하여 자동 주파수 제어(AFC)가 걸리도록 된 단자로 이 단자는 신호가 출력이 되지 않고 출력된 신호가 들어오는 곳이다.On the other hand, the terminal labeled FM TV OUT of the present invention is not a signal output terminal of FM and TV, but is connected to the output terminal of the intermediate frequency amplifier so that automatic frequency control (AFC) is applied. This is where the output signal comes in.

즉, FM TV OUT단자는 중간 주파 앰프의 TV 및 FM출력단자에 연결하여야 한다.That is, the FM TV OUT terminal should be connected to the TV and FM output terminal of the intermediate frequency amplifier.

또한, 밴드 선택 스위치(S1)(S2)(S3)를 AM위치로 절환시켰을 경우에는 밴드 선택 스위치(S1)(S2)(S3)에 각각 AM단자가 연결되어 AM용 가변 콘덴서(VC1)(VC2)와 AM용 트리머 콘덴서(TC101)(TC102)가 AM용 공진주파수를 형성하여 AM용 트랜스(T11)(T12)를 통해 AM중간 주파 신호를 출력시킴으로써 밴드 선택 스위치(S1)(S2)(S3)를 AM위치로 절환시키면 AM신호를 수신할 수 있는 것이다.In addition, when the band select switch S 1 (S 2 ) (S 3 ) is switched to the AM position, the AM terminals are connected to the band select switch S 1 (S 2 ) (S 3 ), respectively. Band selection by condenser VC 1 (VC 2 ) and AM trimmer capacitor (TC101) (TC102) forming AM resonant frequency and outputting AM intermediate frequency signal through AM transformer (T 11 ) (T 12 ) Switching the switch (S 1 ) (S 2 ) (S 3 ) to the AM position allows the AM signal to be received.

이상에서와 같이 본 고안은 종래의 6조식 바리콘이 할 수 있었던 3밴드 튜너 기능을 4조직 바리콘으로 구성한 3밴드 튜너를 이용하여 종래의 기능과 똑같은 작용을 하므로써 종래AM/FM/TV밴드 수신시 문제점으로 지적되었던 설계시의 어려움과 원가의 상승을 해소하며 구조의 간단화를 이룰 수 있는 효과가 있는 것이다.As described above, the present invention uses a three-band tuner composed of four-structured barricades, which the conventional six-barrier barricon can perform. It has the effect of simplifying the structure while eliminating the difficulty of design and the increase of cost, which has been pointed out.

Claims (1)

밴드 패스 필터(1)(2)를 통하여 방송 주파수 신호가 인가되는 FM신호 처리용 집적소자(IC1)와 TV신호 처리용 집적소자(IC2)가 구성된 회로에 있어서, 상기 FM신호 처리용 집적소자(IC1)에 연결된 AM용 가변 콘덴서 (VC1)(VC2)에 밴드 선택 스위치(S1)(S2)를 연결하고 상기 밴드 선택 스위치(S1)(S2)의 FM단자에는 FM용 트리머 콘덴서(TC1)(TC2)와 페이딩 콘덴서(FC1)(FC2) 및 코일(L1)(L2)이 연결되어 FM신호가 트랜스(T1)로 출력되게 FM신호 처리부(10)를 구성하며 상기 밴드 선택 스위치(S1)(S2)의 AM단자에는 AM용 트리머 콘덴서(TC101)(TC102)가 연결되어 AM신호가 트랜스(T11)(T12)로 출력되게 AM신호 처리부(20)를 구성한 후 상기 TV 신호 처리용 집적소자(IC2)에 TV 용 가변 콘덴서(VC3)(VC4)와 TV용 트리머 콘덴서(TC3)(TC4) 및 페이딩 콘덴서(FC3)(FC4)와 코일(L3)(L4)을 연결시켜 TV 신호가 트랜스(T2)로 출력되게 구성하고 상기 밴드 선택 스위치(S1)(S2)와 연동되는 밴드 선택스위치(S3)에서 FM신호 처리부(10)와 TV 신호 처리부(30)의 전원 공급을 선택하게 구성하며 상기 트랜스(T1)(T2)을 통과한 FM 및 TV신호는 다이오드(D3)(D4)와 트랜지스터(Q)를 통하여 출력되게 버퍼용 앰프(40)를 구성시킨 3밴드 튜너회로.In the circuit comprising the FM signal processing integrated device (IC 1 ) and TV signal processing integrated device (IC 2 ) to which a broadcast frequency signal is applied through a band pass filter (1) (2), the FM signal processing integrated circuit is provided. The band select switch S 1 (S 2 ) is connected to the variable capacitor VC 1 (VC 2 ) for AM connected to the element IC 1 , and the FM terminal of the band select switch S 1 (S 2 ) FM signal processing unit for connecting FM trimmer capacitor TC 1 (TC 2 ), fading capacitor (FC 1 ) (FC 2 ) and coil (L 1 ) (L 2 ) to output FM signal to transformer (T 1 ) An AM trimmer capacitor (TC101) (TC102) is connected to the AM terminal of the band selection switch (S 1 ) (S 2 ) so that the AM signal is output to the transformer (T 11 ) (T 12 ). After the AM signal processing unit 20 is configured, the TV signal processing integrated device IC 2 includes a TV variable capacitor VC 3 (VC 4 ), a TV trimmer capacitor TC 3 (TC 4 ), and a fading capacitor ( FC 3 ) (FC 4 ) and coil (L 3 ) (L 4 ) is connected to configure the TV signal to be output to the transformer (T 2 ) and the FM signal processing unit 10 and the band selection switch (S 3 ) in conjunction with the band selection switch (S 1 ) (S 2 ) The power supply of the TV signal processor 30 is configured to be selected, and the FM and TV signals passing through the transformers T 1 and T 2 are outputted through the diodes D 3 and D 4 and the transistor Q. A 3-band tuner circuit comprising a buffer amplifier 40.
KR2019860014681U 1986-09-24 1986-09-24 3 band tuner circuit KR900003407Y1 (en)

Priority Applications (1)

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KR2019860014681U KR900003407Y1 (en) 1986-09-24 1986-09-24 3 band tuner circuit

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KR2019860014681U KR900003407Y1 (en) 1986-09-24 1986-09-24 3 band tuner circuit

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KR880007106U KR880007106U (en) 1988-05-31
KR900003407Y1 true KR900003407Y1 (en) 1990-04-23

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