KR960009711Y1 - Fm/mono system auto-switching circuit of tv receiver - Google Patents
Fm/mono system auto-switching circuit of tv receiver Download PDFInfo
- Publication number
- KR960009711Y1 KR960009711Y1 KR92028505U KR920028505U KR960009711Y1 KR 960009711 Y1 KR960009711 Y1 KR 960009711Y1 KR 92028505 U KR92028505 U KR 92028505U KR 920028505 U KR920028505 U KR 920028505U KR 960009711 Y1 KR960009711 Y1 KR 960009711Y1
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- mono
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- switching circuit
- switching
- input
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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
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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
- H04N5/455—Demodulation-circuits
-
- 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
- H04N5/52—Automatic gain control
-
- 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
- H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
- H04N5/605—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals according to the NICAM system
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 텔레비젼 수상기의 에프엠 모노(FM MONO)시스템 전환 회로도.1 is a schematic diagram of a FM MONO system switching circuit of a conventional television receiver.
제2도는 본 고안의 텔레비젼 수상기의 에프엠 모노(FM MONO)시스템 자동전환 회로도.2 is an automatic switching circuit diagram of an FM MONO system of a television receiver of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 스위칭단 20 : 유럽향 디코더부10: switching stage 20: European decoder unit
30 : FM 신호 강제 구동부 31 : FM 강제스위치30: FM signal forced drive 31: FM forced switch
40 : 마이콤 50 : 튜너40: Micom 50: Tuner
60 : 버퍼부60: buffer part
본 고안은 텔레비젼의 수신방식 전환회로에 관한 것으로, 특히 유럽향(NICAN) 사운드신호 수신시에 무선주파수(Radio Frequency) 신호가 약할 경우에, 이를 감지하고 FM 모노신호로 자동으로 전환하여 출력할 수 있게 한 텔레비젼 수상기의 에프엠 모노시스템 자동전환회로에 관한 것이다.The present invention relates to a circuit for switching a reception method of a television. In particular, when a radio frequency signal is weak when receiving a NICAN sound signal, the present invention can detect and automatically switch to an FM mono signal for output. The present invention relates to an FM switching system of a television receiver.
이하, 제1도를 참조하여 종래의 텔레비젼 수상기의 에프엠 모노시스템 전환회로의 구성 및 동작을 설명한다.The configuration and operation of the FM mono system switching circuit of the conventional television receiver will be described below with reference to FIG.
에프엠 사운드신호(R, L)와 유럽향 사운드신호를 스위칭 출력하는 스위칭단(10)과, 출력되는 FM 모노신호와 유럽향 모노신호에 따라 상태신호를 출력하는 수단과 단자(IN)를 구비한 유럽향 모노 디코더(20), 위의 유럽향 모노 디코더(20)로부터 출력되는 상태신호를 강제 FM 선택스위치(31)의 조작에 의하여 위의 스위칭단(10)의 제어신호 입력단자(FN)로 출력하는 FM 모노신호 강제구동부(30)로 구성된다.And a switching stage 10 for switching and outputting the FM sound signals R and L and the European sound signal, and means for outputting a status signal according to the output FM mono signal and the European mono signal. The European mono decoder 20 and the status signal outputted from the European mono decoder 20 to the control signal input terminal FN of the above switching stage 10 by the operation of the forced FM selection switch 31. It is composed of an FM mono signal forced drive unit 30 to output.
위와 같이 구성된 종래의 텔레비젼 수상기의 에프엠 모노시스템 전환회로의 동작 및 그 문제점을 설명한다.The operation of the FM mono system switching circuit of the conventional television receiver configured as described above and its problems will be described.
유럽향 사운드신호 수신시에 무선주파수(Radio Frequency) 신호가 약할 경우, 난시청 지역등에서는 특히 데이타의 손실이 많아 사운드의 에러가 자주 발생하였다.When the radio frequency signal is weak when receiving a European sound signal, a large amount of data is lost, especially in an astigmatism area, and so a sound error frequently occurs.
종래에는 이를 보완하고자, 제1도에 도시된 바와 같이, 무선주파수(Radio Frequency) 신호가 약하게 수신이 되고, 유럽향에서 FM 모노신호로 전환하여 출력하고자 하는 경우에는, 강제스위치(SW)를 사용자가 직접누름으로써, FM 모노신호 강제구동부(30)의 스위칭용 트랜지스터(Q1)의 베이스에 전원(Vcc)이 인가되도록 하여 스위칭용 트랜지스터(Q1)를 도통시키고, 스위칭단(10)의 선택신호 제어단자(FN)로 저전위의 전압을 인가시킴으로써, 스위칭단(10)으로 입력되는 FM 모노신호를 위의 스위칭단(10)의 출력단으로 출력시켰었다.Conventionally, to compensate for this, as shown in FIG. 1, when a radio frequency signal is weakly received and a European mono frequency signal is to be converted and outputted, a forced switch SW is used. Presses directly, the power supply Vcc is applied to the base of the switching transistor Q1 of the FM mono signal driving unit 30 so as to conduct the switching transistor Q1, and control the selection signal of the switching stage 10. By applying a low potential voltage to the terminal FN, the FM mono signal input to the switching stage 10 was output to the output terminal of the above switching stage 10.
이와 같이, 종래에는 사용자가 직접 강제스위치(SW)를 조작해야만 좋은 음질의 사운드를 청취할 수 있는 불편함이 있어 왔다.As described above, in the related art, there is inconvenience in that a user can directly operate the forced switch SW to hear a sound having good sound quality.
본 고안은 위와 같은 문제점을 해결하고자 안출된 것으로, 회로상의 입력 무선주파수(Radio Frequency) 신호가 적을때, 이를 감자하여 FM 모노신호를 자동으로 출력할 수 있도록 전환이 가능한 텔레비젼 수상기의 에프엠 모노시스템 자동전환회로를 제공함에 그 목적이 있다.The present invention was devised to solve the above problems, and when the input radio frequency signal on the circuit is small, the FM system of the television receiver can be switched to automatically output the FM mono signal by using it. The purpose is to provide a switching circuit.
이하, 첨부된 도면들을 참조하여 본 고안을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제2도에 도시된 바대로, 본 고안은 스위칭단(10), 유럽향 모노 디코더(20), FM 모노신호 강제구동수단(30)으로 구성된 텔레비젼 수상기의 에프엠 모노시스템 전환회로에 있어서, 출력단자(RF-AGC)를 통해 고전위의 전압을 출력하는 튜너(50), 입력되는 고전위의 전압을 버퍼링하여 출력하는 버퍼수단(60), 입력되는 전압에 근거하여, 온스크린 화면을 자동으로 표시하고, 실제 사운드와의 입력을 매칭시켜 FM 모노신호로의 전환을 자동으로 가능하게 하는 제어신호를 출력하는 마이콤(40)으로 구성된다.As shown in FIG. 2, the present invention provides an output terminal in an FM mono system switching circuit of a television receiver composed of a switching stage 10, a European mono decoder 20, and an FM mono signal forced driving means 30. Tuner 50 for outputting high potential voltage through RF-AGC, buffer means 60 for buffering and outputting high potential voltage, and displaying on-screen screen automatically based on the input voltage And a microcomputer 40 that outputs a control signal that automatically switches to the FM mono signal by matching the input with the actual sound.
위와 같이 구성된 본 고안의 동작 및 효과를 상세히 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above in detail.
무선주파수 신호가 약할 경우에, 튜너(50)는 출력단자(RF-AGC)를 통해 고전위의 전압을 출력하고, 위의 고전위의 전압은 버퍼부(60)의 제2트랜지스터(Q2)의 베이스에 인가되어, 입력전원(B+)을 접지하여 저전위로 강하시킴으로써, 마이콤(40)의 입력단자(RAI)에 인가된다.When the radio frequency signal is weak, the tuner 50 outputs a voltage of high potential through the output terminal RF-AGC, and the voltage of the high potential of the second transistor Q2 of the buffer unit 60. It is applied to the base and is applied to the input terminal RAI of the microcomputer 40 by lowering the input power source B + to ground and lowering it.
위와 같이 입력된 레벨신호에 의해 마이콤(40)에 포함된 온스크린 디스플레이 수단이 구동되고, 마이콤(40)의 온스크린 출력단자(OSD)를 통해 문제 데이타가 출력된다.The on-screen display means included in the microcomputer 40 is driven by the level signal input as described above, and the problem data is output through the on-screen output terminal OSD of the microcomputer 40.
그리고, 선택신호 출력단자(OUT)를 통해 출력되는 고준위의 신호가 제1트랜지스터(Q1)의 베이스에 인가되어 제1트랜지스터(Q1)가 도통되고, 스위칭단(10)의 선택신호 제어단자(FN)에 저전위의 전압이 인가됨으로써 스위칭단(10)이 자동으로 전환되어 FM 모노신호가 위의 스위칭단(10)에 출력단으로 출력된다.Then, a high level signal outputted through the selection signal output terminal OUT is applied to the base of the first transistor Q1 to conduct the first transistor Q1, and the selection signal control terminal FN of the switching terminal 10 is turned on. When a low potential voltage is applied to the switching stage 10, the switching stage 10 is automatically switched, and the FM mono signal is output to the switching stage 10 as an output terminal.
이상과 같이, 종래와 텔레비젼 수상기의 에프엠 모노시스템 전환회로에 마이콤(40)에 내장된 온스크린 디스플레이 처리장치와 버퍼부, 튜너등으로 구성된 본 고안을 첨가함으로써, 튜너를 통하여 마이콤으로 입력되는 전압에 따라 온스크린 화면이 자동으로 표시되고, 실제 사운드와의 입력을 매칭시켜 FM 모노신호로의 전환이 자동으로 가능하게 하여, 강제스위치(SW)를 사용하지 않게 됨으로써, 사용자에게 편의를 제공함은 물론, 강제스위치(SW)의 사용으로 인한 급격한 전압의 변화에 따른 부품의 손상을 억제할 수 있는 효과가 있다.As described above, the present invention comprising the on-screen display processing apparatus embedded in the microcomputer 40, the buffer unit, the tuner, and the like is conventionally added to the FM mono system switching circuit of a television receiver, thereby providing a voltage input to the microcomputer through the tuner. As a result, the on-screen screen is automatically displayed and the input to the real sound is automatically switched to the FM mono signal so that the forced switch (SW) is not used, thereby providing convenience to the user. There is an effect that can suppress the damage to the component caused by the sudden change in voltage due to the use of the forced switch (SW).
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92028505U KR960009711Y1 (en) | 1992-12-31 | 1992-12-31 | Fm/mono system auto-switching circuit of tv receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92028505U KR960009711Y1 (en) | 1992-12-31 | 1992-12-31 | Fm/mono system auto-switching circuit of tv receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940018474U KR940018474U (en) | 1994-07-30 |
| KR960009711Y1 true KR960009711Y1 (en) | 1996-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR92028505U KR960009711Y1 (en) | 1992-12-31 | 1992-12-31 | Fm/mono system auto-switching circuit of tv receiver |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR960009711Y1 (en) |
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1992
- 1992-12-31 KR KR92028505U patent/KR960009711Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR940018474U (en) | 1994-07-30 |
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