KR890006333Y1 - Sound intermediate frequency circuit - Google Patents
Sound intermediate frequency circuit Download PDFInfo
- Publication number
- KR890006333Y1 KR890006333Y1 KR2019860013009U KR860013009U KR890006333Y1 KR 890006333 Y1 KR890006333 Y1 KR 890006333Y1 KR 2019860013009 U KR2019860013009 U KR 2019860013009U KR 860013009 U KR860013009 U KR 860013009U KR 890006333 Y1 KR890006333 Y1 KR 890006333Y1
- Authority
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- South Korea
- Prior art keywords
- voice
- filter
- image
- signal
- intermediate frequency
- Prior art date
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Classifications
-
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
- H03H7/0161—Bandpass filters
- H03H7/0169—Intermediate frequency filters
-
- 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)
- Processing Of Color Television Signals (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 회로 구성도.1 is a conventional circuit configuration diagram.
제2도는 본 고안에 따른 회로 구성도.2 is a circuit diagram according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
C4, C5: 콘덴서 6 , 7 : 트랩회로C 4 , C 5 : condenser 6, 7: trap circuit
8 : 음성반송파필터 9 : 음성필터부8: voice carrier filter 9: voice filter unit
본 고안은 음성중간 주파회로에 관한 것으로, 특히 SECAM-L방식의 칼라 텔레비젼 회로에서 영상 중간주파신호와 음성중간주파신호의 전단 증폭기를 공용하고 음성 중간주파에 고가의 톱니파필터를 사용하지 않으므로써 제조부품수를 줄여 제품원가를 절감시킨 음성 중간주파회로에 관한 것이다.The present invention relates to an audio intermediate frequency circuit, and is manufactured by using a common amplifier of a video intermediate frequency signal and an audio intermediate frequency signal in a SECAM-L type color television circuit, and not using an expensive sawtooth filter for the audio intermediate frequency. The present invention relates to a voice intermediate frequency circuit that reduces product cost by reducing the number of parts.
종래 SECAM-L방식의 음성 중간주파회로 구성시 영상신호와 음성신호의 처리에 전단증폭부 및 고가의 톱니파필터를 각기 사용함으로써 부품수가 많아지고 원가상승의 요인이 되는 단점이 있었다. 즉 제1도는 이와같은 종래의 회로도로서 이에 도시한 바와 같이 안테나(ANT)를 통해 신호를 수신하는 튜너(1)의 출력단자는 전단증폭부(2)(2')를 통해 음성톱니파필터(3)및 영상톱니파필터(3')의 입력측에 접속하고, 그 필터(3)(3')의 출력단자는 음성검파부(4)및 영상검파부(4')의 입력단자에 접속하며, 영상검파부(4')의 출력단자는 음성트랩회로(5)의 입력단자에 접속한 것으로 이와같이 구성된 종래 회로의 동작을 보면 다음과 같다.In the conventional SECAM-L speech intermediate frequency circuit, a shear amplifier and an expensive sawtooth filter are respectively used to process the video signal and the audio signal, thereby increasing the number of parts and causing a cost increase. That is, FIG. 1 is a circuit diagram of the related art, and as shown therein, the output terminal of the tuner 1 receiving the signal through the antenna ANT is provided through the shear amplifiers 2 and 2 '. And an input terminal of the image sawtooth filter 3 ', and an output terminal of the filter 3, 3' is connected to an input terminal of the audio detector 4 and the image detector 4 '. The output terminal (4 ') is connected to the input terminal of the voice trap circuit 5, and the operation of the conventional circuit configured as described above is as follows.
안테나(ANT)를 통해 수신된 입력신호는 튜너(1)를 통해 검파 증폭되고 그 출력은 음성부와 영상부로 나뉘어져 전단증폭부(2)(2')에서 증폭되는바, 톱니파필터(3)(3')에서의 삽입손실을 미리 보상하기 위해 통상 20dB 정도 증폭되게 된다. 이때 SECAM-L방식은 음성이 진폭 변조되어 영상부와 음성부로 분리되지 않으면 안되며, 톱니파필터(3)를 통해 음성반송파 성분만을 통과시키고 음성검파부(4)를 통해 음성진폭검파를 하게된다. 이때 음성검파부(4)에서 실제 가청의 음성신호 성분만을 검파하여 음성검파 신호를 출력하게 된다. 또한 영상부는 상기 튜너(1)의 출력을 영상전단증폭부(2')를 통해 증폭되고, 증폭된 전단증폭부(2')의 출력은 색신호 반송파를 포함한 영상반송파 신호가 톱니파필터(3')에 의해 필터링되어 영상검파부(4')에 입력되며, 이 영상검파부(4')에서 검파를 통해 얻어진 합성영상신호는 음성신호 성분이 영상에 미치는 영향을 방지하기 위해 음성트랩회로(5)에서 음성반송파 성분이 트랩되어지고 색신호를 포함한 영상신호 성분 즉 합성 영상신호가 영상검파신호로서 출력되는 것이다.The input signal received through the antenna ANT is detected and amplified by the tuner 1, and its output is divided into an audio part and an image part and amplified by the shear amplifier 2, 2 '. In order to compensate for the insertion loss in 3 '), it is usually amplified by about 20dB. At this time, in the SECAM-L method, the voice is amplitude-modulated and must be separated into an image part and an audio part, and only the voice carrier component is passed through the sawtooth filter 3 and the voice amplitude detection is performed through the voice detector 4. At this time, the voice detector 4 detects only the actual audible voice signal component and outputs a voice detection signal. In addition, the image unit amplifies the output of the tuner 1 through the image shear amplifier 2 ', and the output of the amplified shear amplifier 2' is an image carrier signal including a color signal carrier is a sawtooth filter 3 '. Is filtered and input to the image detector 4 ', and the synthesized video signal obtained through the detection in the image detector 4' is used to prevent an audio signal component from affecting the image. In this case, the audio carrier component is trapped and a video signal component including a color signal, that is, a composite video signal, is output as a video detection signal.
그러나 이와같은 종래에 있어서는 상기한 바와 같이 전단증폭부(2)(2')가 음성부 및 영상부에 각기 사용되고 있으며 복잡하고 고가인 톱니파필터(3)가 음성부에 사용되고 있어 원가상승의 요인이 되는 단점이 있었다.However, in the conventional art, as described above, the shear amplifiers 2 and 2 'are used in the audio and video portions, respectively, and the complicated and expensive sawtooth filter 3 is used in the audio portion. There was a disadvantage.
본 고안은 이와같은 종래의 단점을 감안하여, 음성부와 영상부의 전단증폭부를 공통으로 하고, 음성부의 톱니파필터 대신 코일과 콘덴서를 이용한 간단한 필터를 사용하여 음성반송파 성분만을 통과시켜 음성검파신호를 출력시키게 안출한 것으로 첨부한 제2도에 의하여 이를 상세히 설명하면 다음과 같다. 첨부한 제2도는 본 고안의 회로도로서 이에 도시한 바와같이 튜너(1)의 출력단자는 전단증폭부(10)를 통해 영상톱니파필터(3')의 입력단자에 접속함과 아울러 콘덴서(C4)(C5), 트랩회로(6)(7)및 필터(8)로 된 음성필터부(9)의 입력측에 접속하고, 그 필터부(9)의 출력측은 음성검파부(4)의 입력단자에 접속하며, 상기 영상톱니파필터(3')의 출력측은 영상검파부(4')를 통해 음성트랩회로(5)의 입력측에 접속한 것으로 이와 같이 구성한 본 고안의 작용 및 효과를 상세히 설명하면 다음과 같다.In view of the above-mentioned drawbacks of the present invention, the shear and amplification parts of the audio part and the image part have in common, and instead of the sawtooth filter of the voice part, a simple filter using a coil and a condenser passes only the voice carrier component to output a voice detection signal. When described in detail by the accompanying FIG. 2 as designed to be as follows. 2 is a circuit diagram of the present invention, and as shown therein, the output terminal of the tuner 1 is connected to the input terminal of the image sawtooth filter 3 'through the shear amplifier 10 and the condenser C 4 . (C 5 ), connected to the input side of the voice filter section 9 consisting of the trap circuits 6, 7 and the filter 8, and the output side of the filter section 9 is an input terminal of the voice detector 4. The output side of the image sawtooth filter 3 'is connected to the input side of the voice trap circuit 5 through the image detector 4'. Same as
안테나(ANT)를 통해 수신된 입력신호는 튜너(1)에서 약 30dB정도 증폭되어지고, 튜너(1)의 출력신호는 영상 톱니파 필터(3')에서의 삽입손실을 감안한 만큼 전단증폭부(10)에서 증폭된 후 진폭변조된 음성부와 영상부로 나뉘어져 각기 음성필터부(9)및 영상톱니파필터(3')에 입력된다.The input signal received through the antenna ANT is amplified by about 30 dB at the tuner 1, and the output signal of the tuner 1 is considered to have an insertion loss in the image sawtooth filter 3 ', so that the shear amplifier 10 After being amplified by the amplifier, the signal is divided into an amplitude modulated voice part and an image part and input to the voice filter part 9 and the image sawtooth filter 3 ', respectively.
이때 음성부의 신호는 가변코일(L1)및 콘덴서(C1)로 구성되어 그의 동작 주파수가At this time, the signal of the voice part is composed of a variable coil (L 1 ) and a capacitor (C 1 ) so that its operating frequency is
인 트랩회로(6)에서 인접영상반송파 성분이 트랩되고, 커플링 콘덴서(C5)를 통한후 가변코일(L2)및 콘덴서(C2)로 구성되어 그의 동작 주파수가In the trap circuit 6, adjacent video carrier components are trapped, and are made up of a variable coil L 2 and a capacitor C 2 through a coupling capacitor C 5 , and its operating frequency is increased.
인 트랩회로(7)를 통해 영상반송파 성분이 제거되어 음성반송파필터(8)를 통해서는 순수 음성반송파 성분만이 출력되게 된다. 이와같이하여 음성반송파신호 성분은 커플링 콘덴서(C4)를 통해 음성 검파부(4)에 입력되어 음성신호 성분만이 검파 출력되게 되고, 영상톱니파필터(3')에 입력된 영상신호 성분은 그를 통해 필터링되어 색신호를 포함한 영상반송파 성분은 영상검파부(4')에서 검파되어 합성영상신호를 얻게되며 이 합성영상신호는 음성트랩(5)을 통해 음성신호 성분이 트랩되어 영상검파 신호가 출력되게 되는 것이다.The image carrier component is removed through the in-trap circuit 7, and only the pure voice carrier component is output through the voice carrier filter 8. In this way, the audio carrier signal component is input to the audio detector 4 through the coupling capacitor C 4 so that only the audio signal component is detected and output, and the video signal component input to the image sawtooth filter 3 ' The image carrier component including color signal is filtered through the image detector 4 'to obtain a composite video signal, and the composite video signal is trapped through the audio trap 5 so that the video detection signal is output. Will be.
이상에서 설명한 바와 같이 본 고안은 전단증폭부를 음성부와 영상부에 공통으로 사용하고, 트랩(6)(7)및 필터(8)를 구성된 간단한 음성필터부(9)로서 종래 복잡하고 고가인 톱니파필터를 대신함으로써 부품 및 원가를 절감하는 효과가 있게 된다.As described above, the present invention uses a shear amplifier part in common with the voice part and the image part, and is a simple and expensive sawtooth wave as a simple voice filter part 9 composed of traps 6, 7 and a filter 8. Substituting a filter can reduce parts and costs.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860013009U KR890006333Y1 (en) | 1986-08-26 | 1986-08-26 | Sound intermediate frequency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860013009U KR890006333Y1 (en) | 1986-08-26 | 1986-08-26 | Sound intermediate frequency circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880005500U KR880005500U (en) | 1988-05-12 |
| KR890006333Y1 true KR890006333Y1 (en) | 1989-09-20 |
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ID=19255230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860013009U KR890006333Y1 (en) | 1986-08-26 | 1986-08-26 | Sound intermediate frequency circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890006333Y1 (en) |
-
1986
- 1986-08-26 KR KR2019860013009U patent/KR890006333Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880005500U (en) | 1988-05-12 |
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