KR890001531Y1 - Booster device for a vhf - Google Patents

Booster device for a vhf Download PDF

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Publication number
KR890001531Y1
KR890001531Y1 KR2019850013057U KR850013057U KR890001531Y1 KR 890001531 Y1 KR890001531 Y1 KR 890001531Y1 KR 2019850013057 U KR2019850013057 U KR 2019850013057U KR 850013057 U KR850013057 U KR 850013057U KR 890001531 Y1 KR890001531 Y1 KR 890001531Y1
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South Korea
Prior art keywords
capacitor
resistor
transistor
vhf
coil
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KR2019850013057U
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Korean (ko)
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KR870007566U (en
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성관희
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주식회사 금성사
허신구
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Priority to KR2019850013057U priority Critical patent/KR890001531Y1/en
Publication of KR870007566U publication Critical patent/KR870007566U/en
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Publication of KR890001531Y1 publication Critical patent/KR890001531Y1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards

Abstract

내용 없음.No content.

Description

VHF용 부스터 장치Booster device for VHF

제1도는 종래 부스터 장치의 회로도.1 is a circuit diagram of a conventional booster device.

제2도는 본 고안 장치의 회로도.2 is a circuit diagram of the device of the present invention.

본 고안은 VHF 안테나용 부스터 장치(Booster)장치에 관한 것으로, 특히 안테나 입력단은 교류등가적으로 부스터 내부 발생신호에 대하여서는 접지상태로 되도록 용량조자를 연결하되 시정수회로 및 용량소자를 연결하여 입력된 고주파수 신호는 출력측으로 나오도록한 VHF용 부스터 장치에 관한 것이다.The present invention relates to a booster device for a VHF antenna, and in particular, the antenna input terminal is connected to the capacitor to be grounded with respect to the internally generated signal of the booster, but is connected to the time constant circuit and the capacitor. The high frequency signal is related to a booster device for a VHF to be output to the output side.

종래에는 제1도와 같이, 수신코져하는 신호(RF신호, TV신호)의 입력단자(1)는 코일(L1, L2) 및 콘덴서(C1)로써 구성되어 입력임피던스 및 TV의 VHF대역에 맞게 용량값을 정한다.Conventionally, as shown in FIG. 1, the input terminal 1 of the received signal (RF signal, TV signal) is composed of coils L 1 , L 2 and condenser C 1 , and is connected to the input impedance and the VHF band of the TV. Set the capacity value accordingly.

트랜지스터(Q1)의 바이어스를 설정해주기 위한 저항(R4, R5, R1)과 순간적인 임펄스의 제거를 위한 다이오드(D1) 그리고 신호의 부하저항 및 감쇄를 행하는 저항 (R4) 및 콘덴서(C2)로 구성되어 트랜지스터(Q1)의 베이스에 연결 구성되었다.Resistors R 4 , R 5 , R 1 for setting the bias of transistor Q 1 , diodes D 1 for eliminating instantaneous impulses, resistors R 4 for load resistance and attenuation of the signal, and The capacitor C 2 was connected to the base of the transistor Q 1 .

저항(R4), 콘덴서(C2) 및 코일(L3)은 출력(2)에서 방사되는 신호의 세기중 입력(1)부분으로 방사되는 주파수 성분중 저주파수 성분을 차단하는 고역통과필터로써 동작한다.The resistor R 4 , the condenser C 2 and the coil L 3 operate as a high pass filter that blocks low frequency components of the frequency components radiated to the input 1 portion of the intensity of the signal radiated from the output 2. do.

트랜지스터(Q1)는 3-7dB정도의 낮은 이득으로서 증폭하기 위하여 사용하며 저항(R2, R3), 콘덴서(C4)로써 된 병렬회로중 저항(R2, R3)은 바이어스의 안정을 위하여 낮게 사용되며 공차의 범위를 줄이기 위해 병렬로 사용한다.Transistor (Q 1) is used to amplify a low gain of about 3-7dB and resistors (R 2, R 3), the capacitor resistor (R 2, R 3) of the parallel circuit by a (C 4) is stabilized in bias It is used low for the purpose and in parallel to reduce the range of tolerance.

콘덴서(C3)은 트랜지스터(Q1)의 콜렉터와 연결되어 부하의 입력에 직류성분을 제거하기 위하여 사용되며 출력(2)부분은 뒷단 증폭기의 입력에 사용되게 한다. 코일(L4)과 저항(R7)은 전원을 통한 직류성분의 잡음을 제거하기 위하여 사용한다.The capacitor C 3 is connected to the collector of the transistor Q 1 and used to remove the direct current component at the input of the load, and the output 2 part is used at the input of the rear stage amplifier. The coil L 4 and the resistor R 7 are used to remove noise of the DC component through the power supply.

그러나 이러한 회로의 구성을 하는데 있어 주목적은 입격(1)부로 방사되는 내부발생신호를 제거하는데 주목적인데 반해 방사주파수량은 주파수대 설정에 따르므로 많은 문제가 발생된다.However, the main purpose in constructing such a circuit is to remove the internally generated signal radiated to the inlet (1) part, while the radiation frequency amount depends on the frequency band setting, which causes a lot of problems.

본 고안은 이와같은 종래의 단점을 없이하도록 부스터내의 트랜지스터의 콜랙터에 가변코일과 콘덴서 및 저항을 연결하고 출력단에 직렬 접속된 콘덴서를 연결하여 입력측으로 방사되는 내부발생신호에 대하여서는 교류등가적으로 접지되도록 하되 입력단 고주파수신호는 출력측으로 나오도록 고역통과 여파기가 되도록 하므로서 입력측으로 방사되는 주파구를 방지할 수 있는 VHF용 부스터를 제공하는 것을 목적으로 하며 이하 첨부된 도면을 참조하면서 본 고안 구성, 작용효과를 설명하면 다음과 같다.The present invention connects a variable coil, a capacitor, and a resistor to a collector of a transistor in a booster, and connects a capacitor connected in series to an output terminal, so that the internally generated signal radiated to the input side is alternatingly equivalent to the conventional collector. The purpose of the present invention is to provide a VHF booster that can be grounded, but the high-frequency filter of the input stage high frequency filter is output to the output side. The effect is as follows.

제2도를 참조하면, 콘덴서(C1, C2), 저항(R1~ R4), 코일 (L1, L3), 트랜지스터 (Q1) 및 다이오드(D1)로 구성된 부스터 회로(가)에서 트랜지스터(Q1)의 콜렉터를 전원(B+)에 가변코일(L4) 및 저항(R7)을 통하여 연결하되 가변코일(L4)과 저항(R7)의 접속점을 콘덴서(C7)로 접지하고, 가변코일(L4)의 중간탭과 트랜지스터 (Q1)의 콜렉터를 접속하여 직렬접속된 콘덴서(C5, C6, C3)를 통하여 출력(2)에 연결함과 동시에 콘덴서(C6)의 양단에 저항(R8)을 병렬 접속하고, 콘덴서(C6)와 콘덴서(C3)의 접속점을 저항(R6)으로 접지하여된 구성으로서, 이러한 본 고안의 구성의 작용효과를 설명하면, 가변코일(L4)은 가변탭이 달려있어 그 용량 조정이 되므로 콘덴서(C7)와 저항(R7)에 의하여 입력신호를 트랜지스터(Q1)에 증폭하여된 신호가 출력(2)측에서 반사되는 내부발생 신호성분에 대하여 교류적으로 접지상태로 한다.Referring to FIG. 2 , a booster circuit composed of a capacitor C 1 , C 2 , a resistor R 1 to R 4 , a coil L 1 , L 3 , a transistor Q 1 , and a diode D 1 A) Connect the collector of transistor Q 1 to power supply B + through variable coil L 4 and resistor R 7 , but connect the connection point of variable coil L 4 and resistor R 7 with capacitor ( C 7 ) and the middle tap of the variable coil (L 4 ) and the collector of the transistor (Q 1 ) are connected to the output (2) through the series-connected capacitors (C 5 , C 6 , C 3 ). and at the same time parallel connection of a resistor (R 8) at both ends of the capacitor (C 6), and a capacitor as a (C 6) with the formation to ground the connection point to the resistor (R 6) of the capacitor (C 3), of this subject innovation When explaining the effect of the configuration, the variable coil (L 4 ) is equipped with a variable tap to adjust its capacity, so that the input signal is amplified by the capacitor (C 7 ) and the resistor (R 7 ) to the transistor (Q 1 ) On the output (2) side And a grounded AC-wise with respect to the internally generated signal component is used.

여기에서 콘덴서(C7)는 교류적으로 내부발생 신호성분을 접지시키는 역할을 함과 동시에 전원(B+)에서의 외부 잡음을 차단시키는 역할을 겸한다. 또한 입력되어 트랜지스터(Q1)에서 증폭된 신호는 콘덴서(C5, C5), 저항(R8, R9) 및 코일(L4)에 의하여 구성된 고역통과 필터에 의하여 고주파수성분만 통과되는 것이다.Here, the capacitor C 7 acts to ground the internally generated signal components in an alternating current and at the same time serves to block external noise from the power supply B +. In addition, the input signal amplified by the transistor (Q 1 ) is a high-pass filter composed of a capacitor (C 5 , C 5 ), a resistor (R 8 , R 9 ) and a coil (L 4 ) is passed only high frequency components. .

여기에서 가변코일(L4)을 가변시켜 통과 주파수대를 설정한다. 또한 출력(2)에서 입력(1)으로 방사되는 신호 중 일부를 고역통과필터에서 감쇄시키고 나머지는 트랜지스터(Q1)의 콜랙터에서 베이스로 방사되는 것은 트랜지스터(Q1)의 1/10만큼 감소되는 것이다.Here, the variable coil L 4 is varied to set a pass band. In addition, it is reduced by one-tenth of the transistor (Q 1) and emitted to the base at the output (2) of the collector attenuating part from the high-pass filter and the rest transistor (Q 1) of the signal to be emitted to the input (1) Will be.

또한 본 과안의 부스터를 다단접속한 경우에는 첫번째단과 두번째단의 이득을 G1, G2라 하고 잡음지수(N/F)를 F1, F2라하면 잡음감소율(△F)은 10log(1+)이 되므로 매우 우수한 결과가 얻어진다. 즉, 두번째단의 잡음지수가 10이라하고 첫번째단의 잡음지수를 7이라하면 7보다는 높고 10보다는 낮은 잡음지수의 발생을 적개하는 효율좋은 설계가 얻어지는 것이다.In addition, when the boosters in this section are connected in multiple stages, the gains of the first and second stages are G 1 and G 2 , and the noise indexes (N / F) are F 1 and F 2 . + ), Very good results are obtained. In other words, if the noise index of the second stage is 10 and the noise index of the first stage is 7, it is possible to obtain an efficient design that resists the occurrence of the noise index higher than 7 and lower than 10.

이상에서 설명된 바와같이, 본 고안에 의하면 입력측으로 방사되는 불요방사를 억제할 수 있고 잡음지수가 뛰어난 특성으로 가진 안테나용 부스터 장치를 제공하게 된 것이다.As described above, the present invention is to provide an antenna booster device that can suppress the unwanted radiation radiated to the input side and has an excellent noise figure.

Claims (1)

콘덴서, 저항, 코일, 트랜지스터 및 다이오드로 구성된 부스터회로에서 있어서, 트랜지스터(Q1)의 콜랙터를 전원(B'')에 가변코일(L4) 및 저항(R7)을 통하여 연결하되 가변코일(L4)과 저항(R7)의 접속점을 콘덴서(C7)로 접지하고, 가변코일(L4)의 중간탭과 트랜지스터(Q1)의 콜랙터를 접속하여 직렬접속된 콘덴서(C5, C6, C3)를 통하여 출력(2)에 연결함과 동시에 콘덴서(C6)의 양단에 저항(R8)을 병렬 접속하고, 콘덴서(C6)와 콘덴서(C3)의 접속점을 저항(R6)으로 접지하여된 VHF용 부스터 장치.In a booster circuit composed of a capacitor, a resistor, a coil, a transistor, and a diode, the collector of transistor Q 1 is connected to a power supply B '' through a variable coil L 4 and a resistor R 7 , but the variable coil The connection point of (L 4 ) and the resistor (R 7 ) is grounded with a capacitor (C 7 ), and the capacitor (C 5) connected in series by connecting the middle tap of the variable coil (L 4 ) and the collector of the transistor (Q 1 ). , C 6, C 3) a through the connection point of the parallel-connected, and a capacitor (C 6) and a capacitor (C 3), a resistor (R 8) at both ends of the connection, and at the same time the capacitor (C 6) to the output (2) Booster device for VHF grounded with resistor (R 6 ).
KR2019850013057U 1985-10-08 1985-10-08 Booster device for a vhf KR890001531Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019850013057U KR890001531Y1 (en) 1985-10-08 1985-10-08 Booster device for a vhf

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Application Number Priority Date Filing Date Title
KR2019850013057U KR890001531Y1 (en) 1985-10-08 1985-10-08 Booster device for a vhf

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KR870007566U KR870007566U (en) 1987-05-13
KR890001531Y1 true KR890001531Y1 (en) 1989-04-06

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KR2019850013057U KR890001531Y1 (en) 1985-10-08 1985-10-08 Booster device for a vhf

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