KR890002425Y1 - Channel selecting circuit of television - Google Patents
Channel selecting circuit of television Download PDFInfo
- Publication number
- KR890002425Y1 KR890002425Y1 KR2019850012428U KR850012428U KR890002425Y1 KR 890002425 Y1 KR890002425 Y1 KR 890002425Y1 KR 2019850012428 U KR2019850012428 U KR 2019850012428U KR 850012428 U KR850012428 U KR 850012428U KR 890002425 Y1 KR890002425 Y1 KR 890002425Y1
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- KR
- South Korea
- Prior art keywords
- channel
- signal
- input terminal
- signal input
- tuning
- Prior art date
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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
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/036—Radio; TV
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도이다.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1, 2 : 신호반전부 3 : 채널선국용집적회로1, 2: signal inverting unit 3: integrated channel for channel tuning
4 : 튜닝회로 PRS : 예약녹화신호입력단4: Tuning circuit PRS: Reserved recording signal input terminal
RST : 리셋트신호입력단 UP : 엎채널신호입력단RST: Reset signal input terminal UP: Side channel signal input terminal
DOWN : 다운채널신호입력단DOWN: Down channel signal input terminal
본 고안은 텔레비젼의 채널선국회로에 관한 것으로, 특히 펄스신호에 의하여 선국채널의 번호를 증가시키거나 감소시키는 채널선국용 집적회로를 사용하여 2개의 채널 선택스위치로 각채널을 선국할 수 있도록 간단하게 구성된 텔레비젼의 채널선국회로에 관한 것이다.The present invention relates to a channel tuning circuit of a television, and in particular, it is possible to simply tune each channel with two channel selection switches by using an integrated channel tuning circuit for increasing or decreasing the number of the tuning channel by a pulse signal. A channel tuning circuit of a constructed television.
종래 텔레비젼의 채널선국방식은 각 채널을 고정시켜 놓고 미조정만 한다거나 마이크로프로세서를 이용하여 소프트스위치로 채널선국을 하고, 또한 이를 숫자로 표시하는 등의 방식을 채택하고 있으나, 이들은 그 성능면에서는 월등하지만 이에 비례해서 제품가격이 높아지는 결점이 있었다.Conventional TV channel selection method is to adjust each channel fixedly and to fine tune, or to select the channel by soft switch using a microprocessor, and also to display it numerically, but they are superior in terms of performance. However, there was a drawback that the price of the product increased in proportion.
또한 일반적으로 많이 사용되고 있는 소프트스위치에 의한 채널선국방식에 있어서는 그 채널선국회로가 복잡하고 예약녹화시 타채널과 혼선이 발생하게 되는 등 작업성과 생산성 및 품질안정도 등에서 뒤떨어지게 되는 결점이 있었다.In addition, in the channel tuning method by soft switch, which is widely used, the channel tuning circuit is complicated, and there is a disadvantage in that it is inferior in workability, productivity, and quality stability, such as cross talk with other channels during reservation recording.
본 고안은 위와 같은 제결점을 개선하기 위하여 고안된 것으로, 2개의 채널선택스위치로 채널선국용집적회로에 펄스신호를 인가하여 채널을 선국하고, 예약녹화시에 상기 채널선택스위치의 조작에 관계없이 정확한 동작을 하도록 다이오드와 트랜지스터로 간단하게 구성된 텔레비젼의 채널선국회로를 제공하고자 함에 그 목적이 있다.The present invention was devised to improve the above-mentioned defects, and two channel selection switches apply a pulse signal to the channel selection integrated circuit to tune a channel, and at the time of reservation recording, regardless of the operation of the channel selection switch, It is an object of the present invention to provide a channel tuning circuit of a television which is simply composed of a diode and a transistor for operation.
이하 본 고안의 구성 및 작용, 효과를 예시도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.
본 고안은 엎채널선택스위치(S1)에다 저항(R1)과 콘덴서(C1) 및 다이오드(D1)(D2)를 매개하여 신호반전부(1)를 연결하고, 다운채널선택스위치(S2)에다 저항(R2)과 콘덴서(C2) 및 다이오드(D3)(D4)를 매개하여 신호반전부(2)를 연결하며, 상기 선택스위치(S1)(S2)의 일측에는 트랜지스터(TR1)를 매개하여 예약녹화신호입력단(PRH)을 연결하고, 상기 신호반전부(1)(2)의 출력단에다 채널선국용 집적회로(3)의 채널증가신호입력단(U)과 채널감소신호입력단(D)을 각각 연결한 구조로 되어있다.The present invention connects the signal inversion unit 1 to the channel selector switch S 1 through a resistor R 1 , a capacitor C 1 , and a diode D 1 , D 2 . (S 2 ) to the signal inverting unit (2) via the resistor (R 2 ), capacitor (C 2 ) and diode (D 3 ) (D 4 ), the selection switch (S 1 ) (S 2 ) The reserved recording signal input terminal PRH is connected to one side of the transistor TR 1 , and the channel increase signal input terminal U of the channel selection integrated circuit 3 is connected to the output terminal of the signal inverting unit 1 and 2. ) And the channel reduction signal input terminal (D).
미설명부호 4는 튜닝회로, RST는 리셋트신호입력단, UP은 엎채널선택신호입력단, DOWN은 다운채널선택신호입력단을 나타낸다.Reference numeral 4 denotes a tuning circuit, RST denotes a reset signal input terminal, UP denotes a channel select signal input terminal, and DOWN denotes a down channel select signal input terminal.
제1도는 위와 같은 구조로 되어 있는 본 고안의 회로도를 나타내는 것으로, 채널선국용집적회로(3)는 채널증가신호입력단(U)과 채널감소신호입력단(D)에 각각 펄스신호가 입력되게 되면 이에 따라 선국채널이 1씩 증가 혹은 감소하게 된다. 따라서 선택신호에 의해 선국된 채널에 따라 튜닝회로에서는 동조회로를 절환시켜 방송신호를 수신하는 한편 선국된 채널을 표시하기 위해 발광다이오드 등을 구동시키게 된다.FIG. 1 shows a circuit diagram of the present invention having the above structure, and when the channel selection integrated circuit 3 receives a pulse signal to the channel increase signal input terminal U and the channel decrease signal input terminal D, respectively. As a result, the tuning channel increases or decreases by one. Therefore, the tuning circuit switches the tuning circuit according to the channel tuned by the selection signal to receive the broadcast signal and drives the light emitting diode to display the tuned channel.
이와 같은 채널선국용집적회로(4)에 채널번호를 증가시키도록 하기 위하여 엎채널선택용스위치(S1)를 누르면 전원 B_이 콘덴서(C1)에 인가되고, 이 직류전원 B_가 콘덴서(C1)에 의하여 미분되어서 펄스파형으로 되어 신호반전부(1)의 트랜지스터(TR2)에 공급되므로 트랜지스터(TR2)에 의해 미분파형이 반전된 펄스파형으로 채널선국용집적회로(3)의 입력단자(U)에 공급된다. 따라서 채널선국용집적회로(3)는 선국채널을 1만큼 증가시켜 튜닝회로(4)에 공급하게 된다.When the channel selection switch S 1 is pressed in order to increase the channel number in the channel selection integrated circuit 4, the power source B _ is applied to the capacitor C 1 , and the DC power source B _ is the capacitor. Since the derivative is differentiated by (C 1 ) to be a pulse waveform and is supplied to the transistor TR 2 of the signal inversion unit 1, the integrated waveform circuit for channel channel selection 3 is a pulse waveform in which the differential waveform is inverted by the transistor TR 2 . It is supplied to the input terminal U of. Therefore, the channel tuning integrated circuit 3 increases the tuning channel by 1 and supplies it to the tuning circuit 4.
한편 채널선국용집적회로(4)에 채널번호를 감소시키도록 하기 위하여는 다운채널선택스위치(S2)를 누르게 되는데, 스위치(S2)가 눌리워지면 전원 B_이 콘덴서(C2)에 공급되어서 미분되고, 그 미분출력이 다이오드(D4)를 매개하여 신호반전부(2)의 트랜지스터(TR3)에 공급되어서 미분파형이 반전된 신호로 되어 채널선국용 집적회로(3)의 입력단자(D)에 공급된다. 따라서 채널선국용집적회로(3)는 선국채널을 1만큼 감소시켜 튜닝회로(4)에 공급하게 되는 것이다.On the other hand, in order to reduce the channel number in the channel selection integrated circuit 4, the down channel select switch S 2 is pressed. When the switch S 2 is pressed, the power source B _ is applied to the capacitor C 2 . The differential output is supplied to the transistor TR 3 of the signal inverting unit 2 via the diode D 4 to form a signal in which the differential waveform is inverted, thereby inputting the integrated circuit 3 for channel selection. It is supplied to the terminal D. Therefore, the channel tuning integrated circuit 3 reduces the tuning channel by 1 and supplies it to the tuning circuit 4.
만일 엎채널선택스위치(S1)와 다운채널선택스위치(S2)를 동시에 누르게 되면 전술한 바와 마찬가지 동작으로 채널선국용집적회로(3)의 입력단자(U)(D)에 동시에 펄스신호가 가해지게 되는 데, 이 때는 채널선국용집적회로(3)의 특성에 따라 리셋트되어 처음의 채널이 선국되게 된다.If the channel select switch S 1 and the down channel select switch S 2 are pressed at the same time, the pulse signal is simultaneously applied to the input terminal U (D) of the channel selection integrated circuit 3 in the same manner as described above. In this case, the channel is reset according to the characteristics of the channel selection integrated circuit 3 so that the first channel is tuned.
이와 같이 동작되는 회로에서 예약녹화를 하게 되면 예약녹화신호입력단자(PRH)는 하이레벨이 되어 트랜지스터(TR1)를 턴온시키므로써 스위치(S1)(S2)에 전원 B_가 공급되지 않게 되어 스위치(S1)(S2)에 의한 채널선국을 방지하므로써 예약녹화시의 채널오동작을 방지할 수가 있게 된다.When the reserved recording is performed in the above-described circuit, the reserved recording signal input terminal PRH becomes high level so that the transistor TR 1 is turned on so that the power B _ is not supplied to the switch S 1 and S 2 . By preventing the channel selection by the switches S 1 and S 2 , it is possible to prevent channel malfunction during the reservation recording.
한편, 외부로부터 채널선국을 위한 신호(DOWN)(UP)(RST)가 입력되면 이 신호는 각각 신호반전부(1)(2)에 공급되어서 전술한 바와 마찬가지로 채널선국용집적회로(3)의 입력단자(U)(D)에 각각 채널선국을 위한 펄스신호를 가하게 되어 채널을 선국하게 되는 것이다.On the other hand, when a signal DOWN (UP) (RST) for channel tuning is input from the outside, these signals are supplied to the signal inverting units 1 and 2, respectively, so that the channel tuning integrated circuit 3 for channel tuning is as described above. A pulse signal for channel tuning is applied to the input terminals U and D, respectively, to tune the channel.
여기서 다이오드(D1)(D3)는 스위치(S1)(S2)의 단속시에 콘덴서(C1)(C2)의 충방전을 위해 설치되는 것이고, 다이오드(D5~D8)는 역전류방지용으로 사용된다.Here, the diodes D 1 and D 3 are installed for charging and discharging the capacitors C 1 and C 2 during the interruption of the switches S 1 and S 2 , and the diodes D 5 to D 8 . Is used to prevent reverse current.
상기한 바와 같이 본 고안은 다이오드와 트랜지스터등으로 간단하게 구성되어 2개의 스위치로 텔레비젼의 채널을 선국할 수가 있고, 예약녹화시 채널변동을 방지하여 정확한 예약녹화동작을 하게 되는 장점이 있다.As described above, the present invention is simply configured with a diode, a transistor, and the like, so that two channels can be tuned to a television channel, and there is an advantage in that an accurate reservation recording operation is performed by preventing channel variation during reservation recording.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850012428U KR890002425Y1 (en) | 1985-09-25 | 1985-09-25 | Channel selecting circuit of television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850012428U KR890002425Y1 (en) | 1985-09-25 | 1985-09-25 | Channel selecting circuit of television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870006001U KR870006001U (en) | 1987-04-25 |
| KR890002425Y1 true KR890002425Y1 (en) | 1989-04-22 |
Family
ID=19245509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850012428U KR890002425Y1 (en) | 1985-09-25 | 1985-09-25 | Channel selecting circuit of television |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890002425Y1 (en) |
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1985
- 1985-09-25 KR KR2019850012428U patent/KR890002425Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR870006001U (en) | 1987-04-25 |
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