KR890000126Y1 - Rf modulator - Google Patents

Rf modulator Download PDF

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KR890000126Y1
KR890000126Y1 KR2019850014355U KR850014355U KR890000126Y1 KR 890000126 Y1 KR890000126 Y1 KR 890000126Y1 KR 2019850014355 U KR2019850014355 U KR 2019850014355U KR 850014355 U KR850014355 U KR 850014355U KR 890000126 Y1 KR890000126 Y1 KR 890000126Y1
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signal
filter
modulator
voice
power supply
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KR2019850014355U
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KR870007496U (en
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김남수
박규남
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삼성전자부품 주식회사
정재은
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C3/00Angle modulation
    • H03C3/02Details

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Abstract

내용 없음.No content.

Description

RF변조기RF Modulator

제1도는 본 고안의 블럭다이어그램.1 is a block diagram of the present invention.

제2도는 본 고안의 회로도이다.2 is a circuit diagram of the present invention.

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

1 : 분배기 2 : 신호스위칭회로1: Splitter 2: Signal Switching Circuit

3 : IF필터 4 : 발진부3: IF filter 4: Oscillator

5 : 혼합기 6 : RF필터5: Mixer 6: RF Filter

7 : IF억제용필터 8 : 발진주파수억제용필터7: IF suppression filter 8: Oscillation frequency suppression filter

RF IN : RF신호입력단 TU : 튜너단RF IN: RF signal input terminal TU: Tuner stage

RF OUT : RF신호출력단 IF IN : IF신호입력단RF OUT: RF signal output terminal IF IN: IF signal input terminal

BPF : 밴드패스필터 Q1 : 트랜지스터BPF: Band Pass Filter Q1: Transistor

C1∼C6 : 콘덴서 L1∼L9 : 코일C1 to C6: condenser L1 to L9: coil

R1,R2 : 저항 D1∼D4 : 다이오드R1, R2: resistors D1 to D4: diodes

B+ : 동작전원단 BS : 스위칭전원단B +: Operation power supply BS: Switching power supply

본 고안은 음성다중컨버터에 사용되는 RF변조기에 관한 것으로, 특히 안테나신호를 분배하거나 통과, 절연시킬 수 있도록 된 RF변조기에 관한 것이다.The present invention relates to an RF modulator used in a voice multiple converter, and more particularly, to an RF modulator capable of distributing, passing, or insulating an antenna signal.

음성다중시스템은 2개의 음성반송파를 사용해서 2가지 음성을 동시에 전송하고 수신할 수 있도록 된 시스템으로, 모국어와 외국어를 동시에 송·수신하거나 스테레오음성을 방송함으로써 프로그램의 국제교환이나 음향효과를 증대시킬 수 있도록 된 것인데, 이러한 음성다중시스템에 대한 대비가 되어있지 않는 텔레비젼(이하 기존의 텔레비젼이라함)에 있어서는 음성다중방송을 수신하여 2가지 음성을 재생시킬수가 없기 때문에 별도의 음성 다중 컨버터를 부설시켜 사용해야만 한다.The voice multiple system is a system that can transmit and receive two voices simultaneously by using two voice carriers. It can increase the international exchange and sound effect of a program by simultaneously transmitting and receiving native and foreign languages or broadcasting stereo sound. In the case of a TV which is not prepared for such a voice multiplexing system (hereinafter referred to as a conventional TV), a separate voice multiplexing converter can be installed because the two voices cannot be reproduced by receiving the voice multicasting. Must be used

한편 상기와 같은 기능이 수행되도록 종래에 사용되고 있는 음성다중컨버터로서는 안테나신호를 영상반송파와 음성반송파로 분리한 다음, 음성반송파는 음성회로를 통해 출력시키고, 영상반송파는 영상중간주파회로와 영상검파회로를 거쳐 영상신호를 얻어낸 다음 RF 변조기를 통해 RF신호로 변환시켜 기존의 텔레비젼으로 전달하도록 된것이 있는바, 이러한 종래의 음성다중컨버터는 단지 음성다중방송에 대비한 기능만을 갖고 있을 뿐이어서, 영상반송파의 증폭, 검파등과 같은 과정이 중복되기 때문에 신호의 손실이나 전력의 소모를 가져오게 된다고 하는 등의 문제점을 갖고 있었다.Meanwhile, as a voice multi-converter conventionally used to perform the above functions, the antenna signal is separated into a video carrier and a voice carrier, and then the voice carrier is output through a voice circuit, and the image carrier is an image intermediate frequency circuit and an image detection circuit. After obtaining the video signal through the RF modulator to convert the RF signal to the existing TV, the conventional voice multiple converter has only a function for the audio multi-broadcast, the video carrier Due to the overlap of processes such as amplification, detection, and so on, there are problems such as loss of signal and power consumption.

이에, 본 고안은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 신호스위칭회로를 결합시켜줌으로써 안테나로부터 인가된 신호를 분배해서 직접 기존의 텔레비젼에 연결시켜주거나 IF신호와 발진주파수신호가 혼합된 다음 필터를 통해 RF 신호가 출력되도록 함으로써 튜너를 통해 신호가 전달되어지도록 된 RF변조기를 제공함에 그 목적이 있다.Therefore, the present invention was devised to solve the above problems, and by combining the signal switching circuit, the signal applied from the antenna is distributed and directly connected to an existing television, or IF signal and oscillation frequency signal are mixed. It is an object of the present invention to provide an RF modulator through which a signal is transmitted through a tuner by outputting an RF signal through a filter.

이상과 같은 목적을 달성하기 위한 본 고안은 RF변조기를 예시도면에 의거 상세히 설명하면 다음과 같다.The present invention for achieving the above object will be described in detail based on the RF modulator drawings.

RF신호입력단(RF IN)에 연결된 분배기(1)가 튜너단(TU)과 신호스위칭회로(2)에 연결되면서 이 신호스위칭회로(2)는 RF신호출력단(RF OUT)에 연결되고, IF신호입력단(IF IN)을 갖는 IF필터(3)가 발진부(4)에 연결된 혼합기(5)의 마이너스입력단에 연결된 다음 RF필터(6)를 거쳐 RF신호출력단(RF OUT)에 연결되어 구성되면서, 상기 신호스위칭필터(2)가 병렬의 코일(L3)(L4)및 콘덴서(C2)(C3)로 이루어져 다이오드(D1∼D3)를 통해 접지되어진 구조로 되어 있다.The divider 1 connected to the RF signal input terminal RF IN is connected to the tuner stage TU and the signal switching circuit 2, and the signal switching circuit 2 is connected to the RF signal output terminal RF OUT, and the IF signal is The IF filter 3 having the input terminal IF IN is connected to the negative input terminal of the mixer 5 connected to the oscillator 4 and then connected to the RF signal output terminal RF OUT via the RF filter 6. The signal switching filter 2 has a structure in which the coils L3 and L4 and the capacitors C2 and C3 in parallel are grounded through the diodes D1 to D3.

미설명부호 7은 IF억제용 필터, 8은 발진주파수 억제용필터, Q1은 트랜지스터, C3∼C6는 콘덴서, L3∼L9는 코일, R2는 저항, D4는 다이오드, BPF는 밴드패스필터, B+는 동작전원단, BS는 스위칭전원단이다.Reference numeral 7 is IF suppression filter, 8 is oscillation frequency suppression filter, Q1 is transistor, C3 ~ C6 is capacitor, L3 ~ L9 is coil, R2 is resistor, D4 is diode, BPF is band pass filter, B + is The operating power supply stage and the BS are switching power supply terminals.

상기와 같이 구성된 본 고안은, 신호스위칭회로(2)를 통해 안테나신호를 직접 종래의 텔레비젼에 연결시켜주거나 IF신호를 RF신호를 변환하여 출력시켜 줄 수 있게 됨으로써, 기존의 텔레비젼으로서도 음성다중 방송을 수신할 수 있게 될뿐만 아니라 별도의 영상매개체를 동시에 사용할 수 있게 된다.According to the present invention configured as described above, an antenna signal can be directly connected to a conventional television through the signal switching circuit 2, or an IF signal can be output by converting an RF signal into a conventional television. In addition to being able to receive, separate video media can be used simultaneously.

즉 본 고안의 블럭다이어그램인 제1도로 도시된 바와같이 RF신호입력단(RF IN)으로 부터 인가된 안테나신호가 분배기(1)를 통해 튜터(TU)에만 연결되거나 스위칭회로(2)를 매개로 RF신호출력단(RF OUT)으로 출력되어 기존의 텔레비젼으로 직접 전달 되게되는데, IF신호입력단(IF IN)을 통해 IF신호가 인가되면 신호스위칭회로(2)가 RF신호가 RF출력단(RF OUT)으로 출력되는 것을 차단시켜 줌으로써, IF신호가 혼합기(5)를 통해 RF신호로 변환시켜진 다음 RF필터(6)를 거쳐 RF신호출력단(RF OUT)으로 출력시켜지게 된다.That is, the antenna signal applied from the RF signal input terminal (RF IN) is connected to only the tutor (TU) through the divider 1 or the RF through the switching circuit 2, as shown in FIG. It is output to the signal output terminal (RF OUT) and directly transmitted to the existing television. When the IF signal is applied through the IF signal input terminal (IF IN), the signal switching circuit 2 outputs the RF signal to the RF output terminal (RF OUT). By blocking it, the IF signal is converted into an RF signal through the mixer 5 and then output to the RF signal output terminal RF OUT through the RF filter 6.

이를 제2도로 도시된 회로도를 가지고 좀더 상세히 설명하면, RF신호입력단(RF IN)으로 인가된 안테나의 RF신호가 코일(L1)(L2)과 저항(R1)및 콘덴서(C1)로 구성된 분배기(1)를 거쳐 튜너단(TU)과 신호스위칭회로(2)에 전달되게 되는데, 이때 튜너단(TU)으로는 항시 신호가 전달되지만 신호스위칭회로(2)에는 동작전원단(B+)의 전원공급에 따라 신호가 전달 또는 차단되게 된다.In more detail with the circuit diagram shown in FIG. 2, an RF signal of an antenna applied to the RF signal input terminal RF IN includes a splitter consisting of coils L1, L2, a resistor R1, and a capacitor C1. It is transmitted to the tuner stage TU and the signal switching circuit 2 through 1). At this time, the signal is always transmitted to the tuner stage TU, but the power supply of the operating power stage B + is supplied to the signal switching circuit 2. Depending on the signal is transmitted or blocked.

즉 동작 전원단(B+)으로 전원이 공급되어 발진부(4)와 혼합기(5)등이 동작하게 되면 동작전원단(B+)과 저항(R2)을 통해 연결된 신호스위칭회로(2)가 다이오드(D1∼D3)를 통해 접지됨으로써 신호를 차단시켜 주게 되고, 동작전원이 공급되지 않을 경우에는 신호를 통과시켜 줌으로써 RF신호출력단(RF OUT)으로 RF신호가 출력되게 되는 것이다.That is, when power is supplied to the operating power supply terminal B + and the oscillator 4 and the mixer 5 operate, the signal switching circuit 2 connected through the operating power supply terminal B + and the resistor R2 is connected to the diode D1. By grounding through D3), the signal is cut off, and when the operating power is not supplied, the signal is passed through the signal to output the RF signal to the RF signal output terminal RF OUT.

한편 튜너를 통한 IF신호는 IF신호입력단(IF IN)을 통해 입력되어 코일(L5∼L7)과 콘덴서(C4∼C6)로 구성된 IF필터(3)를 통해 혼합기(5)로 인가되어, 이 신호가 동작전원단(B+)으로 전원이 공급됨에 따라 트랜지스터(Q1)와 다수의 코일, 콘덴서 및 저항으로 구성된 발진부(4)로부터 발생되어 공급되는 발진주파수와 혼합되게 된다.Meanwhile, the IF signal through the tuner is input through the IF signal input terminal IF IN and applied to the mixer 5 through an IF filter 3 composed of coils L5 to L7 and capacitors C4 to C6. As the power is supplied to the operating power supply terminal B +, it is mixed with the oscillation frequency generated and supplied from the oscillation unit 4 composed of the transistor Q1 and a plurality of coils, capacitors, and resistors.

이때 발진부(4)에서는 채널선택에 따른 스위칭전원단(BS)의 인가전압에 따라 코일의 용량을 제어해 줌으로써 적합한 발진주파수를 얻을 수 있게 된다.At this time, the oscillation unit 4 can obtain a suitable oscillation frequency by controlling the capacity of the coil in accordance with the applied voltage of the switching power supply terminal (BS) according to the channel selection.

즉, 튜너를 통한 IF신호는 텔레비젼의 채널 3또는 4에 적합한 RF신호로 변환되어져 기존의 텔레비젼에 인가되게 되는데, 채널선택에 따라 3채널이 선택될 경우에는 스위칭전원단(BS)에 전원이 공급되지 않게되어 동작전원단(B+)의 전압이 저항(R2)과 다이오드(D4)를 통해 코일(L8)과 코일(L9)사이에 가해지게 되고, 4채널이 선택될 경우에는 스위칭전원단(BS)에 동작전원단(B+)보다 높은 스위칭전압이 공급되게 되어 다이오드(D4)에 의해 동작전원이 차단되게 되므로서 유도용량값이 변화되게되고, 그에 따라 채널선택에 접합한 발진주파수가 얻어질 수 있게되는 것이다.That is, the IF signal through the tuner is converted into an RF signal suitable for channels 3 or 4 of the television and applied to the existing television. When three channels are selected according to the channel selection, power is supplied to the switching power supply BS. When the voltage of the operating power supply terminal B + is applied between the coil L8 and the coil L9 through the resistor R2 and the diode D4, the switching power supply terminal BS is selected when four channels are selected. ), The switching voltage higher than the operating power supply terminal B + is supplied and the operating power is cut off by the diode D4 so that the inductance value is changed, and thus the oscillation frequency connected to the channel selection can be obtained. Will be.

상기와 같이 혼합기(5)에서 혼합된 신호는 RF필터(6)를 거치게 되는데, 이 RF필터(6)는 IF억제용 필터(7)와 밴드패스필터(BPF)및 발진주파수억제용 필터(8)로 구성되어, 잔류된 중간주파수와 발진주파수를 완전히 제거하고 3채널 또는 4채널에 적합한 대역만을 통과시켜 줌으로써 양호한 RF신호를 RF출력단(RF OUT)을 통해 출력 시키게 된다.As described above, the mixed signal from the mixer 5 passes through the RF filter 6, which is an IF suppression filter 7, a band pass filter (BPF), and an oscillation frequency suppression filter (8). ), It removes the remaining intermediate frequency and oscillation frequency and passes only the band suitable for 3 channel or 4 channel to output good RF signal through RF OUT.

한편, 상기와 같은 RF변조기의 작동에 관계없이 안테나를 통해 인가되는 RF입력신호는 분배기(1)를 통해 항상 튜너단(TU)으로 공급되게 되므로, 튜너단(TU)에 음성다중컨버터의 음성회로를 연결해서 음성다중방송을 재생시킬 수 있게 될 뿐만 아니라, 음성다중컨버터의 영상회로에다 모니터나 A/V텔레비젼, VTR등과 같은 별도의 영상매개체를 연결시켜 동시에 사용할 수도 있다.On the other hand, regardless of the operation of the RF modulator as described above, since the RF input signal applied through the antenna is always supplied to the tuner stage (TU) through the divider (1), the voice circuit of the voice multiple converter to the tuner stage (TU) In addition to being able to play voice multi-broadcasting, it is also possible to connect a separate video media such as a monitor, A / V TV, VTR, etc. to the video circuit of the voice multi-converter.

Claims (1)

음성다중컨버터의 RF변조기에 있어서, 분배기(1)가 튜너단(TU)과 신호스위칭회로(2)에 연결되면서, 이 신호스위칭회로(2)는 병렬로 연결된 코일(L3)(L4)과 콘덴서(C2)(C3)가 다이오드(D1∼D3)를 통해 접지된 구조를 통해 RF신호출력단(RF OUT)에 연결되고, IF신호 입력단(IF IN)을 갖는 IF필터(3)가 발진부(4)에 연결되면서 RF필터(6)를 통해 RF신호출력단(RF OUT)에 연결된 혼합기(5)의 마이너스입력단에 연결된 것을 특징으로 하는 RF변조기.In the RF modulator of the voice multiple converter, the divider 1 is connected to the tuner stage TU and the signal switching circuit 2, so that the signal switching circuit 2 is connected to the coils L3 and L4 connected in parallel. (C2) (C3) is connected to the RF signal output terminal (RF OUT) through a structure grounded through the diode (D1 ~ D3), the IF filter (3) having the IF signal input terminal (IF IN) is oscillator (4) RF modulator, characterized in that connected to the negative input terminal of the mixer (5) connected to the RF signal output terminal (RF OUT) through the RF filter (6).
KR2019850014355U 1985-10-30 1985-10-30 Rf modulator KR890000126Y1 (en)

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KR890000126Y1 true KR890000126Y1 (en) 1989-03-06

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KR2019850014355U KR890000126Y1 (en) 1985-10-30 1985-10-30 Rf modulator

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KR870007496U (en) 1987-05-13

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