KR910005806Y1 - High frequency characteristic improvement circuit - Google Patents
High frequency characteristic improvement circuit Download PDFInfo
- Publication number
- KR910005806Y1 KR910005806Y1 KR2019860011496U KR860011496U KR910005806Y1 KR 910005806 Y1 KR910005806 Y1 KR 910005806Y1 KR 2019860011496 U KR2019860011496 U KR 2019860011496U KR 860011496 U KR860011496 U KR 860011496U KR 910005806 Y1 KR910005806 Y1 KR 910005806Y1
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- South Korea
- Prior art keywords
- signal
- high frequency
- input
- resistor
- transistor
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Classifications
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- 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
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
- H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
Abstract
내용 없음.No content.
Description
제 1 도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
제 2 도는 종래의 회로도.2 is a conventional circuit diagram.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
R1∼R4: 저항 Q1: 트랜지스터R 1 to R 4 : Resistance Q 1 : Transistor
C1,C2: 콘덴서C 1 , C 2 : condenser
본 고안은 텔레비젼의 고주파 증폭회로에 있어서 고주파 신호의 특성을 개선한 회로에 관한 것이다.The present invention relates to a circuit that improves the characteristics of a high frequency signal in a high frequency amplification circuit of a television.
일반적으로 칼러 텔레비젼 회로의 구성과 수신신호의 흐름에서 안테나에 수신된 합성칼러 영상신호와 음성신호가 고주파 증폭회로에서 증폭되어 별개로 분리된 후, 검파하여 음성신호는 음성계 회로를 통하여 스피커로 출력을 하게되고 영상신호는 영상검파회로에서 검파되고 여기에서 휘도신호와 색도신호로 분리되어 브라운관의 개소오드와 제 1 그리드에 가해져 흑,백화상 및 색채화상을 재생하게 된다.In general, a composite color video signal and an audio signal received by an antenna are separately amplified by a high frequency amplification circuit and separated separately, and then detected and output to a speaker through a voice system circuit. The image signal is detected by the image detection circuit, and is separated into a luminance signal and a chromaticity signal, and is applied to the cathode and the first grid of the CRT to reproduce a black, white image, and a color image.
이러한 칼라 텔레비젼의 영상주파수의 특성은 방송을 수신할 때 발생하는 비이트 방해를 경감하기 위해 주로 영상검파와 6MHz의 검파를 별개로 수신하게 되나 입력된 고주파 신호의 최대 이득의 신호 특성이 저하되면, 화면재생에 필요한 색채신호 및 음성신호의 불안정으로 인하여 화면이 불안정한 상태가 된다.The characteristics of the image frequency of the color television are mainly to receive the image detection and the detection of 6MHz separately in order to reduce the bite interference caused when receiving the broadcast, but when the signal characteristics of the maximum gain of the input high frequency signal is degraded, The screen becomes unstable due to the instability of the color signal and the audio signal necessary for the screen reproduction.
이에 종래에는 제 2 도와 같이 입력되는 고주파 특성을 개선하기 위해 트랜지스터(Q2)의 콜렉터에 전원전압(B+)을 연결하고 그의 에미터에 저항(R7)과 콘덴서(C3)를 연결하므로서 베이스에 신호가 입력되면 출력단(OUT PUT)에는 그의 특성에 의해 증폭된 신호가 나가게 되나 약한 고주파 신호 혹은 잡음신호가 입력되면 입력되는 주파수의 이득의 변하로 인하여 증폭되는 신호주파수의 특성이 변하게 된다.In the related art, in order to improve the high frequency characteristics inputted as the second diagram, the power supply voltage B + is connected to the collector of the transistor Q 2 , and the resistor R 7 and the capacitor C 3 are connected to the emitter thereof. When a signal is input to the output terminal (OUT PUT), the signal amplified by its characteristic is output, but when a weak high frequency signal or a noise signal is input, the characteristic of the amplified signal frequency is changed due to the change of the gain of the input frequency.
이에 본 고안은 고주파 신호가 입력될 때에는 펄스(PULSE)특성이 영상에 큰 영향을 주므로 입력신호를 조정하여 가장좋은 펄스파형을 얻고자 하는데 그 목적이 있다.Therefore, the present invention is intended to obtain the best pulse waveform by adjusting the input signal since the pulse characteristic has a great influence on the image when a high frequency signal is input.
또 다른 목적은 추가된 콘덴서(C1)와 저항(R2)입력신호의 펄스특성 파형 조정 콘덴서(C2)와 그에 따른 신호레벨콘트롤 저항(R2)으로서 입력신호를 변화시켜 입력시킴으로서 트랜지스터(Q1)의 출력으로부터 조정된 파형을 얻는데 있다.Still another object is to add a pulse (C 1 ) and a resistor (R 2 ) to the pulse characteristic waveform adjustment capacitor (C 2 ) and the signal level control resistor (R 2 ) according to the input signal by changing the input of the transistor ( The adjusted waveform is obtained from the output of Q 1 ).
이에 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.When described in detail by the accompanying drawings as follows.
트랜지스터(Q1)의 컬렉터에 저항(R4)을 통해 전원전압(B+)과 연결하고, 그의 베이스에는 저항(R1)을 통해 입력단자(INPUT)에 접속하며, 그의 에미터에는 일측이 접지된 저항(R3) 타측과 콘덴서(C2)가 출력단자(OUT PUT)에 접속된 공지의 것에 있어서, 저항(R1)양단에 콘덴서(C1)를 접속하고 트랜지스터(Q1)의 베이스에 일측이 접지된 저항(R2)타측을 연결하여 구성한다.The collector of transistor Q 1 is connected to the power supply voltage B + through a resistor R 4 , and its base is connected to the input terminal INPUT through a resistor R 1 , and one side of the emitter is grounded. In the known one in which the other side of the resistor R 3 and the capacitor C 2 are connected to the output terminal OUT PUT, the capacitor C 1 is connected across the resistor R 1 and the base of the transistor Q 1 is connected. It is configured by connecting the other side of the grounded resistor (R 2 ) to the other side.
미설명부호 R5, R6, R7는 저항이고, C3는 콘덴서, Q2는 트랜지스터이다.Reference numerals R 5 , R 6 and R 7 are resistors, C 3 is a capacitor and Q 2 is a transistor.
이와같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.
우선 입력단자(INPUT)에 외부로부터 수신된 고주파 신호가 입력되면 저항(R1)과 콘덴서(C1)을 통하여 트랜지스터(Q1)의 베이스에 입력이된다.First, when a high frequency signal received from the outside is input to the input terminal INPUT, the input is input to the base of the transistor Q 1 through the resistor R 1 and the capacitor C 1 .
즉, 트랜지스터(Q1)의 베이스에 신호전압이 가하여지게 되면 그의 트랜지스터(Q1)가 턴 온이 되어 공급전원(B+)은 컬렉터와 에이터 사이에 흐르게 됨으로서 컬렉터 전압은 거의 에미터 전압 가까이까지 저하되게된다.That is, when become a signal voltage is added to the base of the transistor (Q 1) his transistor (Q 1) is a turn-on supply voltage (B +) is the collector voltage by being flowing between the collector and the initiator is substantially emitter decreases to a voltage near Will be.
이때 입력단자(INPUT)에 입력된 고주파 신호가 저항(R1)과 콘덴서(C1)에 흐르게 되면 저항(R1) 및 콘덴서(C1)의 필터작용에 의하여 트랜지스터(Q1)에서 고주파 신호의 게인을 높이게 되며, 출력단자(OUT PUT)에는 저항(R1)(R2)에 의해 분할(Divide)되어 적정 바이어스된 신호가 콘덴서(C1)의 용량에 의해 고주파영역에서의 트랜지스터(Q1)입력 임피던스(Impedance)를 줄어들게 된다.The input terminal (INPUT) of the high-frequency signal is a resistance (R 1) and a high-frequency signal from the capacitor (C 1) when the flow through the resistance (R 1) and a capacitor transistor (Q 1) by a filter function of the (C 1) input to the The gain of the signal is increased, and the output terminal OUT PUT is divided by resistors R 1 and R 2 so that the signal biased properly is transistor Q in the high frequency region by the capacitance of the capacitor C 1 . 1 ) Reduce the input impedance.
따라서 트랜지스터(Q1)의 베이스와 에미터간이 전압(VBE)이 증가됨에 따라 출력단자(OUT PUT)의 전압 또한 증가하게 되므로 트랜지스터(Q1)의 에미터에는 증폭된 고주파 신호가 얻어지는데 이 증폭된 신호의 폭은 트랜지스터(Q1)의 베이스의 시정수에 따르게 되며, 그의 에미터에 출력된 신호는 저항(R3)과 콘덴서(C2)에 의해 불필요한 신호가 제거된 후 출력단자(OUT PUT)에 인가됨으로서 증폭단(미도시)에 연결되어 각 신호로 분류되고 텔레비젼의 모니터에 나타나게 된다.Therefore, as the voltage VBE between the base and the emitter of the transistor Q 1 increases, the voltage of the output terminal OUT PUT also increases, and thus an amplified high frequency signal is obtained at the emitter of the transistor Q 1 . The width of the given signal depends on the time constant of the base of the transistor Q 1 , and the signal output to the emitter is output terminal OUT after the unnecessary signal is removed by the resistor R 3 and the capacitor C 2 . PUT) is connected to an amplifier stage (not shown) to be classified into each signal and appear on a television monitor.
이상에서와 같이 본 고안은 입력단자(INPUT)에 인가된 고주파신호를 저항(R1)(R2)과 콘덴서(C1)에 의해 주파수의 특성을 개선함으로서 출력단자(OUT PUT)에 출력되는 주파수의 이득을 높여주게 되어 보다 선명한 화면으로 텔레비젼을 시청할 수 있는 효과가 있다.As described above, the present invention improves the frequency characteristics of the high frequency signal applied to the input terminal INPUT by the resistor R 1 (R 2 ) and the condenser C 1 and is output to the output terminal OUT PUT. By increasing the gain of the frequency, you can watch TV on a clearer screen.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860011496U KR910005806Y1 (en) | 1986-07-31 | 1986-07-31 | High frequency characteristic improvement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860011496U KR910005806Y1 (en) | 1986-07-31 | 1986-07-31 | High frequency characteristic improvement circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880003617U KR880003617U (en) | 1988-04-14 |
| KR910005806Y1 true KR910005806Y1 (en) | 1991-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860011496U KR910005806Y1 (en) | 1986-07-31 | 1986-07-31 | High frequency characteristic improvement circuit |
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| Country | Link |
|---|---|
| KR (1) | KR910005806Y1 (en) |
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1986
- 1986-07-31 KR KR2019860011496U patent/KR910005806Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880003617U (en) | 1988-04-14 |
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