KR850001849Y1 - Singnal matching circuit - Google Patents
Singnal matching circuit Download PDFInfo
- Publication number
- KR850001849Y1 KR850001849Y1 KR2019830011386U KR830011386U KR850001849Y1 KR 850001849 Y1 KR850001849 Y1 KR 850001849Y1 KR 2019830011386 U KR2019830011386 U KR 2019830011386U KR 830011386 U KR830011386 U KR 830011386U KR 850001849 Y1 KR850001849 Y1 KR 850001849Y1
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- KR
- South Korea
- Prior art keywords
- signal
- external signal
- matching circuit
- transistor
- drive circuit
- 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
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/036—Radio; TV
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
1,2,3 : 외부신호 입력단자 B : 신호배칭회로부1,2,3: External signal input terminal B: Signal batching circuit
1',2',3' : 내부신호 입력단자 C : 스위칭회로부1 ', 2', 3 ': Internal signal input terminal C: Switching circuit part
A : 외부신호 드라이브 회로부A: External signal drive circuit
본 고안은 티브이 세트를 퍼스날 컴퓨터의 모니터로도 사용할 수 있도록 한 티브이의 외부신호 매칭회로에 대한 것이다.The present invention relates to an external signal matching circuit of a TV that can be used as a monitor of a personal computer.
일반적인 티브이 세트에 퍼스날 컴퓨터를 연결했을 경우 퍼스날 컴퓨터의 출력신호의 주파수 대역이 10MHz정도의 넓은 대역을 갖고 있음에 비해 티브이의 출력단회로는 대역이 졸기 때문에 퍼스날 컴퓨터의 출력신호를 재생하기에는 불충분하여 티브이의 브라운관에 재현되는 글씨가 번지고 희미해지는 폐단이 있었다.When the personal computer is connected to a general TV set, the output signal of the personal computer has a wide band of about 10 MHz, but the output stage circuit of the TV is not enough to reproduce the output signal of the personal computer because the band is sleepy. There was a discoloration of the letters reproduced in the CRT and fading.
본 고안은 이와 같은 점을 개선하여 티브이 세트를 퍼스날 컴퓨터의 모니터로도 겸용할 수 있도록 한 것으로서 이를 첨부도면에 의해 상술하면 다음과 같다.The present invention is to improve the above point as a TV set can also be used as a monitor of a personal computer as described in detail by the accompanying drawings as follows.
퍼스날 컴퓨터로부터 출력되는 적·녹·청 신호가 입력되는 외부신호 입력단자(1)(2)(3)를 공지의 외부신호드라이브 회로부(A)에 연결하고 그 출력단을 트랜지스터(Q4-Q9) 및 저항(R4-R12)으로 구성된 신호매칭회로부(B)에 연결하며, 티브이의 색신호인 적·녹·청 신호가 입력되는 내부신호 입력단자(1')(2')(3')를 트랜지스터(Ql0-Ql3) 및 저항(R13-R22)으로 구성된 스위칭회로부(C)에 연결하고 그 출력단을 신호매침회로부(B)에 연결하며, B+전압을 신호선택스위치(SW)를 통해 외부신호 드라이브회로부(A)와 스위칭회로부(C)내의 트랜지스터(Q13)의 베이스에 공접시키고, 신호매칭회로부(B)의 출력단을 각각 공지의 영상 드라이브회로의 입력단자(4)(5)(6)에 연결한 구성으로서, 미설명부호중 Cl,C2,C3는 콘덴서 R1,R2,R3,R13은 저항 Ql,Q2,Q3는 트랜지스터이다.Connect the external signal input terminals (1) (2) (3) to which the red, green, and blue signals output from the personal computer are input to a known external signal drive circuit section (A), and the output terminals of the transistors (Q 4 to Q 9). ) and the resistor (R 4 -R 12) to the signal matching circuit (B), and connected to, inside which the color signals of red, green, blue signals of the input television signal input terminal (1 ') (2') (3 'consisting of ) Is connected to the switching circuit section C consisting of transistors Q l0 -Q l3 and resistors R 13 -R 22 , and its output terminal is connected to the signal embedding circuit section B, and the B + voltage is connected to the signal selection switch SW. ) And the output terminal of the signal matching circuit portion B are coupled to the base of the transistor Q 13 in the external signal drive circuit portion A and the switching circuit portion C, respectively. as a configuration connected to the 5) and (6), the reference numeral of C l, C 2, C 3 are capacitors R 1, R 2, R 3 , R 13 is the resistance Q l, Q 2, Q 3 is a transistor The.
상기와 같이 구성된 본 고안에 있어 외부신호 드라이브 회로부(A)는 공지된 회로이나, 퍼스날 컴퓨터로부터 입력되는 외부신호의 넓은 주파수 대역에 대응하여 티브이의 브라운관에 재현되는 글씨를 좀더 선명하게 하기위해 적당한 값의 콘덴서(C1-C3)와 저항(R1-R3)을 부가시켜 피킹(peaking)을 준 점이 다르다.In the present invention configured as described above, the external signal drive circuit unit A is a well-known circuit or a suitable value for sharpening the text reproduced in the CRT of a TV corresponding to a wide frequency band of an external signal input from a personal computer. Peaking is different by adding capacitors (C 1 -C 3 ) and resistors (R 1 -R 3 ).
신호선택스위치(SW)는 외부신호 드라이브 회로부(A)와 스위칭 회로부(C)에 B+전압을 공급 또는 차단시키므로서 퍼스날 컴퓨터로부터의 외부신호와 티브이 세트의 내부신호중 하나가 선택되어 신호매칭 회로부(B)를 통해 공지의 적·녹·청 드라이브회로를 거친후에 브라운관에서 재생되는 것으로서, 이를 퍼스날 컴퓨터의 모니터로서 사용할 경우와 일반 티브이로 사용할 경우로 나누어 설명하면,The signal selection switch SW supplies or cuts the B + voltage to the external signal drive circuit A and the switching circuit C, so that one of the external signal from the personal computer and the internal signal of the TV set is selected and the signal matching circuit part B is selected. After playing through the known red, green, and blue drive circuits, it is reproduced in the CRT, and it is divided into a case of using as a monitor of a personal computer and a case of using a general TV.
첫째, 퍼스날 컴퓨퓨의 모니터로 사용할 경우 신호선택스위치(SW)를 “온”시키면, B+전압이 저항(R21)(R22)을 통해 트랜지스터(Q13)의 베이스에 공급되므로 트랜지스터(Q13)가 도통되고 콜렉터와 에미터사이에는 새츄레이션(saturation)전압(약 0.2V)만이 걸리게 된다. 그러므로 스위칭회로부(C)내의 각 트랜지스터(Ql0)(Ql1)(Q12)가 오프되어 각 입력단자(1')(2')(3')에 인가된 티브이의 색신호가 트런지스터(Ql0)(Q11)(Q12)에서 차단되므로 신호매칭 회로부(B)내의 트랜지스터(Q7)(Q8)(Q9)의 베이스로는 아무 신호도 공급되지 않는 반면에, B+전압이 저항(R23)을 통해 외부신호 드라이브 회로부(A)에 공급되므로 각 입력단자(1)(2)(3)에 인가된 퍼스날 컴퓨터의 출력신호가 외부신호 드라이브 회로부(A)를 통해 신호매칭 회로부(B)내의 각 트랜지스터(Q4)(Q5)(Q6)의 베이스에 공급되고, 이로인해 트랜지스터(Q4)(Q5)(Q6)가 도통되므로 퍼스날 컴퓨퓨의 신호가 각 트랜지스터(Q4)(Q5)(Q6)의 에미터단자에 연결된, 공지의 영상 드라이브회로의 각 입력단자(4)(5)(6)로 입력되어 영상드라이브회로를 거쳐 브라운관에서 재생된다.First, peoseunal when "on" the signal selection switch (SW) when it is used as a monitor of the computer Pew, B +, so the voltage via a resistor (R 21) (R 22) supplied to the base of the transistor (Q 13) transistor (Q 13 ) Is conducted and only a saturation voltage (approximately 0.2 V) is applied between the collector and the emitter. Therefore, the transistors Q l0 , Q l1 and Q 12 in the switching circuit unit C are turned off so that the color signal of the TV applied to each of the input terminals 1 ', 2' and 3 'is converted into a transistor. Since no signal is supplied to the base of the transistors Q 7 (Q 8 ) (Q 9 ) in the signal matching circuit portion B since it is blocked at Q l0 ) (Q 11 ) (Q 12 ), the voltage B + Since the signal is supplied to the external signal drive circuit unit A through the resistor R 23 , the output signal of the personal computer applied to each of the input terminals 1, 2, and 3 is supplied through the external signal drive circuit unit A to the signal matching circuit unit. It is supplied to the base of each transistor (Q 4 ) (Q 5 ) (Q 6 ) in (B), so that the transistors Q 4 (Q 5 ) (Q 6 ) are conducted so that the signal of the personal computer is transmitted to each transistor. It is input to each input terminal 4, 5, 6 of a known image drive circuit connected to the emitter terminals of Q 4 , Q 5 and Q 6 , and reproduced in a CRT via an image drive circuit.
둘째, 일반 티브이로 사용할 경우 신호선택스위치(SW)를 “오프”시키면 외부신호 드라이브 회로부(A)로는 B+전압이 공급되지 못하므로 트랜지스터(Q1)(Q2)(Q3)가 오프되어 각 입력단자(1)(2)(3)에 인가된 퍼스날 컴퓨터의 신호는 차단되는 반면, 신호선택스위치(SW)가 “오프”상태이므로 트랜지스터(Q13)도 오프되어 이 트랜지스터(Q13)의 콜렉터에는 저항(R20)을 통해 B+전압이 인가되고 이 전압이 저항(R19) 및 저항(Rl3)(Rl4)(Rl5)을 통해 트랜지스터(Q10)(Q11)(Q12)의 베이스에 공급되므로 트랜지스터(Q10) (Q11)(Q12)가 도통된다. 따라서 각 입력단자(1')(2')(3')에 인가된 티브이의 색신호가 트랜지스터(Ql0)(Q11)(Q12)를 통해 신호매칭 회로부(B)내의 트랜지스터(Q7)(Q8)(Q9)의 베이스에 공급되므로 트랜지스터(Q7)(Q8)(Q9)가 도통되어서, 티브이의 색신호가 각 트랜지스터(Q7)(Q8)(Q9)의 에미터단자에 연결된, 공지의 영상드라이브회로의 각 입력단자(4)(5)(6)로 입력되어 영상드라브회로를 거쳐 브라운관에서 재생되는 것으로서, 퍼스날 컴퓨터로부터의 외부신호와 티브이의 색신호가 입력단자(1)(2)(3) 및 입력단자(1')(2')(3')에 동시에 인가되어 있으나 신호선택스위치(SW)의 온, 오프에 의해 어느 한 신호만이 선택되도록 한 것이다.Second, in case of using as a general TV, when the signal selection switch SW is “off”, since the B + voltage is not supplied to the external signal drive circuit unit A, the transistors Q 1 , Q 2 and Q 3 are turned off. the input terminal (1) and (2) a signal of a personal computer, on the other hand blocked, and a signal selection switch (SW) "oFF" state because the transistor (Q 13) is also turned off and the transistor (Q 13) is applied to (3) The collector is supplied with a voltage B + through a resistor (R 20 ) and this voltage is applied to a transistor (Q 10 ) (Q 11 ) (Q 12 ) through a resistor (R 19 ) and a resistor (R l3 ) (R l4 ) (R l5 ). Transistor Q 10 (Q 11 ) (Q 12 ) is conductive. Therefore, the color signal of the TV applied to each of the input terminals 1 ', 2', and 3 'is transmitted through the transistors Q l0 , Q 11 , Q 12 , and the transistor Q 7 in the signal matching circuit part B. Since it is supplied to the base of (Q 8 ) (Q 9 ), transistors Q 7 (Q 8 ) and Q 9 are turned on so that the color signal of the TV is emitted from each transistor Q 7 (Q 8 ) (Q 9 ). It is input to each input terminal (4) (5) (6) of the known video drive circuit connected to the terminal and reproduced in the CRT through the video drive circuit, and the external signal from the personal computer and the color signal of the TV are inputted. It is applied to terminals 1, 2, 3 and input terminals 1 ', 2', and 3 'at the same time, but only one signal is selected by turning the signal selection switch SW on and off. will be.
이상과 같이 본 고안은 티브이 세트를 퍼스날 컴퓨터의 모니터 겸용으로 사용할 수 있도록 하여 제품의 고급화를 이룩한 유용한 고안이다.As described above, the present invention is a useful design that achieves high-quality products by allowing a TV set to be used as a monitor of a personal computer.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830011386U KR850001849Y1 (en) | 1983-12-30 | 1983-12-30 | Singnal matching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830011386U KR850001849Y1 (en) | 1983-12-30 | 1983-12-30 | Singnal matching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850005528U KR850005528U (en) | 1985-08-10 |
| KR850001849Y1 true KR850001849Y1 (en) | 1985-08-28 |
Family
ID=70160999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019830011386U KR850001849Y1 (en) | 1983-12-30 | 1983-12-30 | Singnal matching circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR850001849Y1 (en) |
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1983
- 1983-12-30 KR KR2019830011386U patent/KR850001849Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR850005528U (en) | 1985-08-10 |
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