KR940003508Y1 - Catv circuit - Google Patents

Catv circuit Download PDF

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Publication number
KR940003508Y1
KR940003508Y1 KR2019880013563U KR880013563U KR940003508Y1 KR 940003508 Y1 KR940003508 Y1 KR 940003508Y1 KR 2019880013563 U KR2019880013563 U KR 2019880013563U KR 880013563 U KR880013563 U KR 880013563U KR 940003508 Y1 KR940003508 Y1 KR 940003508Y1
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KR
South Korea
Prior art keywords
voice
signal
circuit
audio
modulator
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Application number
KR2019880013563U
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Korean (ko)
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KR900005964U (en
Inventor
이병욱
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삼성전기 주식회사
서주인
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Priority to KR2019880013563U priority Critical patent/KR940003508Y1/en
Publication of KR900005964U publication Critical patent/KR900005964U/en
Application granted granted Critical
Publication of KR940003508Y1 publication Critical patent/KR940003508Y1/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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers

Abstract

내용 없음.No content.

Description

유선 TV 컨버터의 음성신호합성회로Audio signal synthesis circuit of cable TV converter

제1도는 종래의 음성다증 스테레오복조기에서 음성스테레오신호회로의 일예도.1 is an example of a voice stereo signal circuit in a conventional voice multiplex demodulator.

제2도는 본 고안에 의한 음성신호합성회로도.2 is a voice signal synthesis circuit according to the present invention.

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

1 : 음성신호합성회로 2 : 음성다중스테레오 복조기1: voice signal synthesis circuit 2: voice multiple stereo demodulator

본 고안은 음성스테레오 청취기능이 부가되는 유선 TV컨버터에서 그 스테레오원음재생을 좀더 양호히 유지시키려는 유선 TV 컨버터의 음성 신호합성회로에 관한 것이다.The present invention relates to a voice signal synthesizing circuit of a cable TV converter to maintain stereo stereo sound reproduction better in a cable TV converter to which voice stereo listening function is added.

이러한 기술분야에서의 유선 TV 컨버터측에서 음성스테레오신호를 베이스밴드오디오로 청취할때 제1도와 같은 음성다중스테레오복조기(2)를 통하여 복조된 좌, 우신호를 소리재생장치의 좌, 우 스피커에 연결하여 사용되어졌으며, 또, RF변조기측으로는 상기 음성다중스테레오복조기(2)로부터의 좌출력을 입력시켜 음성입력으로 사용되었다.In the technical field of the wired TV converter, the left and right signals demodulated through the voice multiple stereo demodulator 2 as shown in FIG. 1 are transmitted to the left and right speakers of the sound reproducing apparatus. In addition, the left side output from the voice multiple stereo demodulator 2 was input to the RF modulator side and used as a voice input.

그러나, 상기 음성다중스테레오복조기(2)에서의 음성신호를 RF변조기축으로 좌 출력음성신호만 가해지므로서 완전한 스테레오신호재생이 이뤄지지못하므로 이에따른 문제점이 발생하였다.However, since only the left output audio signal is applied to the RF modulator axis as a voice signal from the voice multiple stereo demodulator 2, a full stereo signal reproduction cannot be performed.

본 고안은 종래의 상기와같은 문제점을 개선하고져 안출한 것이다.The present invention has been made to improve the problems as described above.

본 고안은 특히 음성다중스테레오복조기측에서의 좌, 우음성신호를 RF변조기축으로 보낼때 좌, 우음성신호를 합성하여 출력토록하는 음성신호발생회로를 제공코져 한 것이다.The present invention is to provide a voice signal generating circuit for synthesizing the left and right audio signals and outputting the left and right audio signals from the voice multiple stereo demodulator side to the RF modulator axis.

이하에서 이를 좀더 구체적으로 설명하면 다음과 같다.Hereinafter, this will be described in more detail.

제2도는 본 고안에 외한 음성신호합성회로(1)를 나타내고 있다. 이음성신호합성회로(1)는 음성다중스테레오복조기(2)로부터 출력되는 좌, 우출력측과 RF 변조기측사이에 구비되는 구성으로된다.2 shows an audio signal synthesis circuit 1 other than the present invention. The bidirectional signal synthesis circuit 1 has a configuration provided between the left and right output side and the RF modulator side output from the voice multiple stereo demodulator 2.

또, 상기 음성신호합성회로(1)는 반전연산증폭기(11)에 의한 신호가산회로로되고 이의 반전단자(-)엔 좌신호단으로부터의 캐패시터(C2), 저항(R3)과 우신호단으로부터의 캐패시터(C4), 저항(R6)를 거쳐 상호공접되고, 그 비반전단자(+)에는 저항(R4,R5)으로 전원(Vcc)을 분압하는 구성으로 된다.The voice signal synthesizing circuit 1 is a signal adding circuit by the inverting operational amplifier 11, and its inverting terminal (-) is a capacitor (C 2 ), a resistor (R 3 ) and a right signal from the left signal terminal. The capacitor C 4 from the stage and the resistor R 6 are mutually joint, and the non-inverting terminal + is divided into resistors R 4 and R 5 to divide the power supply Vcc.

미설명부호 3은 전자볼륨, R2, R1은 이득조정용저항, C1은 바이패스캐패시터이다.Reference numeral 3 is an electron volume, R 2 , R 1 are gain adjusting resistors, and C 1 is a bypass capacitor.

이러한 구성의 본 고안은 음성다중스테레오복조기(2)로부터 출력되는 좌, 우음성신호는 음성신호합성회로(1)의 연산증폭기(11)의 반전단자측으로 각기 공통으로 가해지고 연산증폭기(11)에 의해 좌, 우두신호는 합산되어 RF 변조기측으로 가해지는 것이다.According to the present invention, the left and right audio signals output from the voice multiple stereo demodulator 2 are commonly applied to the inverting terminal side of the operational amplifier 11 of the audio signal synthesis circuit 1, and to the operational amplifier 11. As a result, the left and right head signals are summed and applied to the RF modulator side.

그리고, 이때의 합성출력신호는 저항(R3, R6, R2)등에 의하여 그 이득이 조정되어지고 분압저항(R4, R5)에 의해서는 전원(Vcc)을로 하여 A 및 B점이 모두 동일전원으로 된다.In this case, the gain of the synthesized output signal is adjusted by the resistors R 3 , R 6 , R 2 , etc., and the power supply Vcc is supplied by the voltage divider R 4 , R 5 . A and B are both the same power supply.

그러므로 좌, 우신호는 연산증폭기(11)의 기준전위Vcc를 중심으로 합성되어지고 좌+우 신호가 출력되는 것이다.Therefore, the left and right signals are the reference potentials of the operational amplifier 11. It is synthesized around Vcc and the left and right signals are output.

이러한 본 고안은 좌신호를 RF변조기의 음성입력신호로 사용함에 의해 완전한 스테레오 신호를 제공치 못하게 되는 불리함을 제거할 수 있는 유익한 특징이 있다.This invention has an advantageous feature that can eliminate the disadvantage of not providing a complete stereo signal by using the left signal as the voice input signal of the RF modulator.

Claims (1)

음성다중스테레오복조기(2)에서 유선 TV컨버터의 RF 변조기측으로 음성신호를 입력하는 회로에 있어서, 상기 음성다중스테레오복조기(2) 좌, 우출력과 RF변조기음성입력과의 사이에는 좌, 우음성신호합성용 음성신호합성회로(1)가 구비되어진 구성을 특징으로 하는 유선 TV 컨버터의 음성신호합성회로.A circuit for inputting a voice signal from an audio multiple stereo demodulator (2) to an RF modulator side of a wired TV converter, wherein the left and right outputs of the audio multiple stereo demodulator (2) are between a left and right audio signal and an RF modulator audio input. An audio signal synthesizing circuit of a cable TV converter, characterized in that the audio signal synthesizing circuit (1) is provided.
KR2019880013563U 1988-08-19 1988-08-19 Catv circuit KR940003508Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880013563U KR940003508Y1 (en) 1988-08-19 1988-08-19 Catv circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880013563U KR940003508Y1 (en) 1988-08-19 1988-08-19 Catv circuit

Publications (2)

Publication Number Publication Date
KR900005964U KR900005964U (en) 1990-03-09
KR940003508Y1 true KR940003508Y1 (en) 1994-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880013563U KR940003508Y1 (en) 1988-08-19 1988-08-19 Catv circuit

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Publication number Publication date
KR900005964U (en) 1990-03-09

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