KR810001311Y1 - Input circuit of sound if amplifier - Google Patents

Input circuit of sound if amplifier Download PDF

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Publication number
KR810001311Y1
KR810001311Y1 KR2019800006258U KR800006258U KR810001311Y1 KR 810001311 Y1 KR810001311 Y1 KR 810001311Y1 KR 2019800006258 U KR2019800006258 U KR 2019800006258U KR 800006258 U KR800006258 U KR 800006258U KR 810001311 Y1 KR810001311 Y1 KR 810001311Y1
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KR
South Korea
Prior art keywords
amplifier
circuit
input circuit
detector
trap
Prior art date
Application number
KR2019800006258U
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Korean (ko)
Inventor
박찬웅
Original Assignee
주식회사금성사
허신구
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Application filed by 주식회사금성사, 허신구 filed Critical 주식회사금성사
Priority to KR2019800006258U priority Critical patent/KR810001311Y1/en
Application granted granted Critical
Publication of KR810001311Y1 publication Critical patent/KR810001311Y1/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/22—Continuous tuning of single resonant circuit by varying inductance and capacitance simultaneously
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/148—Video amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/246—A series resonance being added in shunt in the input circuit, e.g. base, gate, of an amplifier stage, e.g. as a trap

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음.No content.

Description

음성중간주파 증폭기의 입력회로Input circuit of voice intermediate frequency amplifier

제1도는 종래의 음성중간주파 증폭기의 입력회로 결합 방식을 보여주고 있는 회로도.1 is a circuit diagram showing an input circuit coupling method of a conventional voice intermediate frequency amplifier.

제2도는 본 고안에 의한 음성중간주파 증폭기의 입력회로 결합 방식을 표시한 회로도.2 is a circuit diagram showing an input circuit coupling method of the voice intermediate frequency amplifier according to the present invention.

본 고안은 텔레비전의 음성중간주파 증폭기의 입력회로에 관한것이며, 특히 영상중간 주파증폭기 및 검파기와 영상증폭기 사이에 브리지 T트랩회로를 접속시켜서 결합 및 트랩 기능을 동시에 행할 수 있도록 한음성주파 증폭기의 입력회로에 관한 것이다.The present invention relates to an input circuit of an audio intermediate frequency amplifier of a television, and in particular, an intermediate frequency amplifier and a bridge T trap circuit connected between a detector and an image amplifier to perform a combination and trap function at the same time. It is about a circuit.

종래 음성주파 증폭기의 입력회로 결합방식은 영상 검파출력이 SIF(signal intmediate frequency) 신호 검출용 IFT(intermedite frequency transformer)와 SIF신호 필터용 트랩(trap) 회로에 각기 공급 되었었다. 이 경우에 있어서는, 동일주파수에 공진하는 공진회로를 2개 구성한 연유로, 회로가 복잡해질 뿐만 아니라 주파수조정을 두번하여야만 하는 결점이 제기되었었다.In the input circuit coupling method of a conventional audio frequency amplifier, an image detection output was supplied to an intermedite frequency transformer (IFT) for detecting a signal intmediate frequency (SIF) signal and a trap circuit for an SIF signal filter, respectively. In this case, due to the configuration of two resonant circuits resonating at the same frequency, a drawback has arisen that the circuit is not only complicated but also requires two frequency adjustments.

본 고안은 상술한 결점을 고려하여 인출한 것인데, 종래의 2개의 공진회로 대신, 단 1개의 공진회로를 사용하여 결합 및 트랩기능을 동시에 행할 수 있는 회로를 변경시킴에 따라 회로가 간단해지고, 이에 따른 조정시간이 짧아져서 조립시간이 단축되며, 또한 회로구성소자의 절약으로 제조원가가 낮아지는 특징이 있는 것으로 첨부된 도면을 참조하여 이것을 상세히 설명하면 다음과 같다.The present invention is drawn in consideration of the above-described drawbacks, and the circuit becomes simpler by changing the circuit capable of simultaneously performing the coupling and trap functions using only one resonant circuit instead of the two conventional resonant circuits. According to the accompanying drawings, the adjustment time is shortened, the assembly time is shortened, and the manufacturing cost is reduced due to the saving of circuit components.

제1도는 종래의 음성주파 증폭기의 입력회로 결합방식을 보여주고 있는 회로도이다. VIF(video intermediate frequency)증폭기 및 검파기(1)와 비데오 증폭기 (7), SIF 증폭기 및 검파기(14) 사이에 브리지 T트랩회로(B) 및 단동조회로(A)를 구성하였다. 브리지 T트랩회로(B)는 저항기(4), 콘덴서(3),(6), 인덕터(5)로 구성되어 VIF증폭기 및 검파기(1)의 출력에 포함된 음성주파 신호를 기준점으로 바이패스시키고 영상신호는 비데오 증폭기(7)로 인입되게 한다.1 is a circuit diagram showing an input circuit coupling method of a conventional voice frequency amplifier. A bridge T trap circuit (B) and a single tuning circuit (A) were constructed between a video intermediate frequency (VIF) amplifier and detector (1), a video amplifier (7), a SIF amplifier and a detector (14). The bridge T trap circuit (B) is composed of a resistor (4), a capacitor (3), (6), and an inductor (5) to bypass the voice frequency signal included in the output of the VIF amplifier and detector (1) to a reference point. The video signal is led to the video amplifier 7.

또 결합 콘덴서(10)을 통해서 단동조회로(A)에 인가된 VIF증폭기 및 검파기(1)의 신호중에서 음성주파 신호만 변압기(13)의 2차측 권선에 유기되어 SIF증폭기 및 검파기(14)에 인입되는데, 이 단동조회로(A)는 변압기(13, 콘덴서(12), 저항기(11)로 구성된다. 저항기(2)는 바이어스 저항이며, 저항기(8)는 전합 제한용이다.In addition, only the audio frequency signal of the VIF amplifier and the detector 1 applied to the single tuning circuit A through the coupling capacitor 10 is induced in the secondary winding of the transformer 13, and is transferred to the SIF amplifier and the detector 14. The single tuning circuit A is composed of a transformer 13, a condenser 12, and a resistor 11. The resistor 2 is a bias resistor, and the resistor 8 is for total limiting.

제2도 제1도에 표시한 브리지 T트랩회로 및 단동조회로를 개량하여 결합시킨 것으로서, 제1도의 인덕터(5)에 걸리는 음성주파 신호가 2차측 코일로 유도될 수 있게, 변압기(A)를 구성하였다. VIF증폭기 및 검파기(1)에서 출력된 영상신호 및 음성주파신호는 T트랩회로(B)에 결합된다. 이 T트랩회로에서 음성 주파신호가 콘덴서(3),(5) 및 변압기(A)의 1차측(6a)을 경유하게 되는데, 이때 음성주파신호는 변압기(A)의 2차측권선(6B)에 유기되어 SIF증폭기 및 검파기(9)에 인가되고, 영상 주파신호는 비데오 증폭기(7)에 인입하게 된다.Fig. 2 is a modified combination of the bridge T trap circuit and the monotuning circuit shown in Fig. 1, so that the voice frequency signal applied to the inductor 5 of Fig. 1 can be induced into the secondary coil. Was constructed. The video signal and the audio frequency signal output from the VIF amplifier and detector 1 are coupled to the T trap circuit B. FIG. In this T-trap circuit, the audio frequency signal passes through the capacitors 3, 5 and the primary side 6a of the transformer A. At this time, the audio frequency signal is transmitted to the secondary winding 6B of the transformer A. It is extracted and applied to the SIF amplifier and detector 9, and the image frequency signal is introduced into the video amplifier 7.

따라서, 단지 트랩회로의 기준점으로의 바이패스 통로에 음성주파신호 유기를 위한 변압기(A)를 구성함으로서, 결합 및 트랩기능이 동시에 행해짐은 물론, 호로 구성이 간단해져 제조원가를 대폭 절감시킬 수 있는 잇점을 본 고안은 지니고 있다.Therefore, by constructing the transformer A for discharging the voice frequency signal only in the bypass passage to the reference point of the trap circuit, the coupling and trap functions are performed simultaneously, and the arc configuration is simplified, which greatly reduces the manufacturing cost. This invention has.

Claims (1)

도면에 표시한 바와같이, VIF증폭기 및 검파기(1)와 비데오 증폭기(7), SIF증폭기 및 검파기(9)간에 구성된 결합 및 트랩회로에 있어서, 트랩회로(B)의 음성주파바이 패스통도에 구성된 인적터(6A)에 2차측 코일(6B)을 부가하여 음성주파 신호를 유도하도록 구성한 음성주간주파 증폭기의 입력회로.As shown in the figure, in the coupling and trap circuit configured between the VIF amplifier and detector 1, the video amplifier 7, the SIF amplifier, and the detector 9, the audio frequency bypass passage of the trap circuit B is configured. An input circuit of an audio frequency amplifier with a secondary coil (6B) attached to the injector (6A) to induce an audio frequency signal.
KR2019800006258U 1980-09-27 1980-09-27 Input circuit of sound if amplifier KR810001311Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019800006258U KR810001311Y1 (en) 1980-09-27 1980-09-27 Input circuit of sound if amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019800006258U KR810001311Y1 (en) 1980-09-27 1980-09-27 Input circuit of sound if amplifier

Publications (1)

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KR810001311Y1 true KR810001311Y1 (en) 1981-09-25

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ID=19219139

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Application Number Title Priority Date Filing Date
KR2019800006258U KR810001311Y1 (en) 1980-09-27 1980-09-27 Input circuit of sound if amplifier

Country Status (1)

Country Link
KR (1) KR810001311Y1 (en)

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