KR900003100Y1 - Tuning display circuit - Google Patents
Tuning display circuit Download PDFInfo
- Publication number
- KR900003100Y1 KR900003100Y1 KR2019860010886U KR860010886U KR900003100Y1 KR 900003100 Y1 KR900003100 Y1 KR 900003100Y1 KR 2019860010886 U KR2019860010886 U KR 2019860010886U KR 860010886 U KR860010886 U KR 860010886U KR 900003100 Y1 KR900003100 Y1 KR 900003100Y1
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- KR
- South Korea
- Prior art keywords
- output
- transistor
- tuning
- potential
- display circuit
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/02—Indicating arrangements
- H03J1/04—Indicating arrangements with optical indicating means
- H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
- H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/02—Indicating arrangements
- H03J1/04—Indicating arrangements with optical indicating means
- H03J1/041—Pointers, markers, or the like, for tuning dials; Folding dials
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
내용 없음.No content.
Description
첨부된 도면은 본 고안의 튜우닝 표시 회로도이다.The accompanying drawings are a tuning diagram circuit of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 영상증폭기 2 : 적분기1: Image Amplifier 2: Integrator
3 : 필터 4 : 비교부3: filter 4: comparison unit
5 : 구동회로 6 : 구동부5 driving circuit 6 driving unit
본 고안은 비디오 카세트 레코더 등과 같은 기기에 있어서 방송신호가 정확히 튜우닝되었는지를 표시하는 튜우닝 표시회로에 관한 것이다.The present invention relates to a tuning display circuit for indicating whether a broadcast signal is correctly tuned in a device such as a video cassette recorder.
종래의 수동으로 튜우닝하는 비디오 카세트 레코더 등의 기기들은 사용자가 채널을 선정한 후 미세조정을 하게 구성되어 있으므로 사용자는 방송신호를 튜우닝할 경우에 일일이 모니터에 나타나는 화면을 보면서 조정해야 됨은 물론 튜우닝이 정확히 되었는지도 알 수 없는 결함이 있었다.Conventional manual tuning equipment such as video cassette recorder is configured to fine tune after user select channel, so user should adjust while watching the screen appearing on monitor when tuning broadcasting signal. There was a flaw of which it was not known exactly.
본 고안은 이와 같은 종래의 결함을 감안하여, 튜우닝에 따라 발광다이오드 또는 부저 등의 구동부를 구동시켜 튜우닝 상태를 표시하게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is designed to display a tuning state by driving a driving unit such as a light emitting diode or a buzzer according to tuning in consideration of such a conventional defect, which will be described in detail with reference to the accompanying drawings.
첨부된 도면은 본 고안의 튜닝 표시회로도로서, 이에 도시한 바와 같이 영상증폭기(1)의 출력단자를 저항(R1)을 통해 콘덴서(C1) 및 증폭기(AMP1)의 입력단자에 접속함과 아울러 그 접속점을 콘덴서(C2)를 통해 증폭기(AMP1)의 출력측에 접속하여 적분기(2)를 구성하고, 적분기(2)의 출력단자는 콘덴서(C3,C4) 및 코일(L1)로 된 필터(3)를 통해 비교기(COM1)의 비반전입력단자(+) 및 저항(R2)에 접속하고, 비교기(COM1)의 반전입력단자(-)에는 저항(R3,R4)을 접속하여 비교부(4)를 구성하며, 비교부(4)의 출력단자는 트랜지스터(TR1)의 에미터 및 저항(R5)에 접속하여, 트랜지스터(TR1)의 베이스에는 저항(R6,R7)을 접속하고, 콜렉터는 저항(R8)에 접속함과 아울러 그 접속점을 저항(R9)을 통해 트랜지스터(TR2)의 베이스 및 저항(R10)에 접속하여 구동회로(5)를 구성하며, 구동회로(5)의 출력단자인 트랜지스터(TR2)의 콜렉터는 구동부(6)의 부저(B2)에 접속하여 구성한 것으로, 상기에서 구동부(6)는 부저(BZ)대신에 발광다이오드로 대용할 수도 있고, 도면의 설명중 미설명 부호 TH는 튜우닝시 고전위가 입력되는 튜우닝 제어신호 입력단자이고, VCC는 전원단자이다.The accompanying drawings are a tuning display circuit diagram of the present invention, and as shown therein, the output terminal of the image amplifier 1 is connected to the input terminals of the capacitor C1 and the amplifier AMP1 through the resistor R1 and the same. The connection point is connected to the output side of the amplifier AMP1 through the capacitor C2 to form the integrator 2, and the output terminal of the integrator 2 connects the filter 3 composed of the capacitors C3 and C4 and the coil L1. The comparator 4 is configured by connecting to the non-inverting input terminal (+) and the resistor R2 of the comparator COM1 and connecting the resistors R3 and R4 to the inverting input terminal (-) of the comparator COM1. The output terminal of the comparator 4 is connected to the emitter and the resistor R5 of the transistor TR1, the resistors R6 and R7 are connected to the base of the transistor TR1, and the collector is connected to the resistor R8. In addition, the connection point is connected to the base of the transistor TR2 and the resistor R10 through the resistor R9 to form the driving circuit 5, and the output of the driving circuit 5 is performed. The collector of the transistor TR2, which is a terminal, is connected to the buzzer B2 of the driver 6, and the driver 6 may be replaced by a light emitting diode instead of the buzzer BZ. The explanation code TH is a tuning control signal input terminal to which a high potential is input during tuning, and V CC is a power supply terminal.
이와 같이 구성된 고안의 작용효과를 상세히 설명하면 다음과 같다.If described in detail the effect of the devised in this way as follows.
전원단자(VCC)에 전원이 인가되고, 사용자가 방송신호를 튜우닝 제어신호 입력단자(TH)에 고전위가 입력되며, 영상증폭기(1)에서 튜우닝에 따른 영상신호가 출력되면, 그 출력된 영상신호는 적분기(2)를 통해 적분되고, 필터(3)를 통해 일정 직류레벨로 변환된 후 출력되어 비교기(COM1)의 비반전입력단자(+)에 인가되고, 이에따라 비교기(COM1)는 전원단자(Vcc)의 전원을 저항(R3,R4)으로 분할하여 그의 반전입력단자(-)에 인가되는 기준전압과 영상신호의 크기에 따라 그의 비반전 입력단자(+)에 인가되는 직류레벨을 비교하여 그 차이에 비례하는 일정 전위를 출력하고, 그 출력된 일정전위는 트랜지스터(TR1)의 에미터에 인가되어 트랜지스터(TR1)의 콜렉터 전압이 가변된다.When power is supplied to the power supply terminal V CC , a user inputs a broadcast signal to the tuning control signal input terminal TH, and a video signal according to tuning is output from the video amplifier 1. The output video signal is integrated through the integrator 2, converted to a constant DC level through the filter 3, and then output to the non-inverting input terminal (+) of the comparator COM1, accordingly, the comparator COM1 Divides the power supply of the power supply terminal Vcc into resistors R3 and R4, and the DC level applied to the non-inverting input terminal (+) according to the reference voltage applied to its inverting input terminal (-) and the magnitude of the image signal. Are compared to output a constant potential proportional to the difference, and the output constant potential is applied to the emitter of the transistor TR1 to vary the collector voltage of the transistor TR1.
따라서, 방송신호에 정확히 튜우닝되지 않아 비교기(COM1)에서 출력되는 전위가 낮을 경우에는 트랜지스터(TR1)의 에미터에 낮은 전위가 인가되므로 그 트랜지스터(TR1)의 에미터 전위와 베이스전위의 차이가 크게 되어 그 트랜지스터(TR1)의 콜렉터 전위가 낮아지게 되고, 이에따라 트랜지스터(TR2)의 베이스에 인가되는 전위도 낮아져 그의 도통율이 증가되므로 그 트랜지스터(TR2)의 콜렉터 전류가 증가되어 부저(BZ)로 흐르게 된다. 이와 같이 부저(BZ)에 많은 전류가 흐르게 됨에 따라 그 부저(BZ)는 크게 울리게 된다.Therefore, when the potential output from the comparator COM1 is not tuned to the broadcast signal and the potential is low, a low potential is applied to the emitter of the transistor TR1, so that the difference between the emitter potential and the base potential of the transistor TR1 is different. The larger the collector potential of the transistor TR1 is, the lower the potential applied to the base of the transistor TR2, and thus the conductivity thereof increases. Thus, the collector current of the transistor TR2 is increased to the buzzer BZ. Will flow. As much current flows through the buzzer BZ as described above, the buzzer BZ sounds greatly.
그리고, 상기에서 방송신호에 정확히 튜우닝되어 비교기(COM1)의 출력전위가 높아지면, 상기와는 반대로 트랜지스터(TR1)의 에미터 전위와 베이스전위의 차이가 작아져 그 트랜지스터(TR1)의 콜렉터 전위가 높아지게 되므로 트랜지스터(TR2)의 베이스에 인가되는 전위가 높아지고, 이에따라 그 트랜지스터(TR2)의 도통율이 감소되어 그의 콜렉터 전류가 감소되어 부저(BZ)로 흐르게 된다. 이와 같이 부저(BZ)에 작은 전류가 흐르게 됨에 따라 그 부저(BZ)는 작게 울리게 된다.When the output potential of the comparator COM1 is increased by being precisely tuned to the broadcast signal, the difference between the emitter potential and the base potential of the transistor TR1 is small as opposed to the above, and the collector potential of the transistor TR1 is reduced. Since is increased, the potential applied to the base of the transistor TR2 is increased, and accordingly, the conduction rate of the transistor TR2 is reduced, and the collector current thereof is reduced to flow to the buzzer BZ. As a small current flows through the buzzer BZ as described above, the buzzer BZ rings small.
이상에서 설명한 바와 같이 본 고안은 방송신호의 튜우닝 상태에 따라 구동부(6)의 구동상태를 가변하여 표시하므로 기기가 방송신호에 정확히 튜우닝 되었는지를 용이하게 알 수 있는 효과가 있다.As described above, the present invention varies the display state of the driving unit 6 according to the tuning state of the broadcast signal, thereby easily detecting whether the device is tuned correctly to the broadcast signal.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860010886U KR900003100Y1 (en) | 1986-07-24 | 1986-07-24 | Tuning display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860010886U KR900003100Y1 (en) | 1986-07-24 | 1986-07-24 | Tuning display circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880003530U KR880003530U (en) | 1988-04-14 |
| KR900003100Y1 true KR900003100Y1 (en) | 1990-04-14 |
Family
ID=19254118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860010886U KR900003100Y1 (en) | 1986-07-24 | 1986-07-24 | Tuning display circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900003100Y1 (en) |
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1986
- 1986-07-24 KR KR2019860010886U patent/KR900003100Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880003530U (en) | 1988-04-14 |
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