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KR900000708Y1 - Synchronizing signal switching circuit - Google Patents

Synchronizing signal switching circuit Download PDF

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Publication number
KR900000708Y1
KR900000708Y1 KR2019860007450U KR860007450U KR900000708Y1 KR 900000708 Y1 KR900000708 Y1 KR 900000708Y1 KR 2019860007450 U KR2019860007450 U KR 2019860007450U KR 860007450 U KR860007450 U KR 860007450U KR 900000708 Y1 KR900000708 Y1 KR 900000708Y1
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South Korea
Prior art keywords
pulse signal
resistor
input terminal
synchronous signal
capacitor
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KR2019860007450U
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Korean (ko)
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KR870019249U (en
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정갑연
이윤기
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주식회사금성사
구자학
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/04Synchronising

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)

Abstract

내용 없음.No content.

Description

동기신호 스위칭회로Synchronous signal switching circuit

제1도는 종래의 스위칭 회로도.1 is a conventional switching circuit diagram.

제2도는 본 고안의 스위칭 회로도.2 is a switching circuit diagram of the present invention.

제3도 및 제4도는 동기신호가 정펄스신호 및 부펄스신호 경우의 제2도 각부의 파형도.3 and 4 are waveform diagrams of respective parts of the second diagram when the synchronization signal is a positive pulse signal and a negative pulse signal.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 적분기 2 : 정류기1: Integrator 2: Rectifier

TR1: 트랜지스터 R1-R11: 저항TR 1 : transistor R 1 -R 11 : resistance

C1-C6: 콘덴서 D1, D5: 다이오드C 1 -C 6 : capacitor D 1 , D 5 : diode

OP1: 연산증폭기OP 1 : Operational Amplifier

본 고안은 압력되는 동기신호가 정펄스신호나 부펄스신호에 관계없이 출력측으로 정펄스신호가 출력되게 하는 동기신호 스위칭회로에 관한 것이다.The present invention relates to a synchronization signal switching circuit which causes a positive pulse signal to be output to an output side regardless of a positive pulse signal or a negative pulse signal.

종래에는 동기신호 입력단자(SYN)로 입력되는 동기신호가 정펄스신호일 경우에는 절환스위치(SW1)의 가동단자를 일측 고정단자(a1)에 단락시켜 동기신호를 인버터(I1)를 통해 부펄스신호로 반전시키고, 인버터(I2)를 통해 정펄스신호로 다시 반전시켜 절환스위치(SW1)를 통해 동기신호 출력단자(SYO)로 출력시키며, 입력되는 동기신호가 부펄스신호일 경우에는 절환스위치(SW1)의 가동단자를 타측고정단자(b1)에 단락시켜 부펄스신호를 인버터(I1)를 통해 정펄스신호로 반전시킨 후 절환스위치(SW1)를 통해 동기신호 출력단자(SYO)로 출력시키게 하였다.Conventionally, when the synchronous signal inputted to the synchronous signal input terminal SYN is a positive pulse signal, the movable terminal of the switching switch SW 1 is shorted to one fixed terminal a 1 so that the synchronous signal is transmitted through the inverter I 1 . Inverted to a negative pulse signal, and inverted back to a positive pulse signal through the inverter (I 2 ) and output to the synchronous signal output terminal (SYO) through the switching switch (SW 1 ), when the input synchronous signal is a negative pulse signal Short the movable terminal of the switching switch (SW 1 ) to the other fixed terminal (b 1 ) to invert the negative pulse signal to the positive pulse signal through the inverter (I 1 ), and then through the switching switch (SW 1 ), the synchronization signal output terminal. Output to (SYO).

그러나, 이와같은 종래의 스위칭회로는 입력되는 동기신호가 정펄스신호인지 또는 부펄스신호인지 일일이 확인한 후 절환스위치(SW1)를 절환시켜야 되므로 사용자에게 많은 번거로움을 주는 결함이 있었다.However, such a conventional switching circuit has a defect that causes a lot of trouble for the user since the switching switch SW 1 must be switched after confirming whether the input synchronization signal is a positive pulse signal or a negative pulse signal.

본 고안은 이와같은 종래의 결합을 감안하여, 입력되는 동기신호의 정펄스신호 및 부펄스신호에 따라 전자스위치를 제어하여 자동으로 정펄스신호가 출력되게 하는 스위칭회로를 안출한 것으로, 이를 첨부된 제2도 내지 제4도의 도면에 의하여 상세히 설명하면 다음과 같다.The present invention has been made in view of the conventional combination, a switching circuit for automatically outputting a positive pulse signal by controlling the electronic switch in accordance with the positive pulse signal and the negative pulse signal of the input synchronization signal, attached to this The detailed description with reference to FIGS. 2 to 4 is as follows.

제2도는 본 고안의 스위칭 회로로서, 이에 도시한 바와 같이, 동기신호 입력단자(SYN)를 콘덴서(C1)를 통해 다이오드(D1)의 케소드에 접속함과 아울러 그 접속점을 저항(R1) 및 접지저항(R2), 접지콘덴서(C2)로된 적분기(1)와 다이오드(D2) 및 콘덴서(C3)로된 정류기(2)를 통해 연산증폭기(OP1)의 반전입력단자(-)에 접속하고, 연산증폭기(OP1)의 비반전입력단자(+)에는 저항(R3, R4)를 접속하여 그의 출력측을 병렬 접속된 다이오드(D3) 및 저항(R5)을 통한 후, 콘덴서(C4) 및 저항(R6)을 통한 동기신호입력단자(SYN)와 함께 접지저항(R7) 및 다이오드(D4)를 통해 동기신호출력단자(SYO)에 접속하며, 상기 동기신호입력단자(SYN)를 직렬 접속된 콘덴서(C5) 및 저항(R9), (R10)을 통해 트랜지스터(TR1)의 베이스에 접속함과 아울러 그 콘덴서(C5) 및 저항(R9), (R10)의 각 접속점에 상기 연산증폭기(OP1)의 출력측을 저항(R8) 및 다이오드(D5)를 통해 접속하고 트랜지스터(TR1)의 콜렉터는 접지저항(R11) 및 콘덴서(C6)를 통해 동기신호출력단자(SYO)에 접속하여 구성한 것으로 도면의 설명 중 미설부호 Vcc는 전원단자이다.FIG. 2 is a switching circuit of the present invention. As shown in FIG. 2, the synchronizing signal input terminal SYN is connected to the cathode of the diode D 1 through a capacitor C 1 , and the connection point is connected to the resistor R. FIG. 1 ) and reversal of operational amplifier OP 1 through integrator 1 with grounding resistor (R 2 ), ground capacitor (C 2 ) and rectifier ( 2 ) with diode (D 2 ) and capacitor (C 3 ) Resistor R 3 , R 4 is connected to the non-inverting input terminal (+) of the operational amplifier OP 1 , and the output side thereof is connected in parallel with the diode D 3 and the resistor R. 5 ), and then to the synchronous signal output terminal (SYO) through the ground resistor (R 7 ) and diode (D 4 ) together with the synchronous signal input terminal (SYN) through the capacitor (C 4 ) and resistor (R 6 ). The synchronizing signal input terminal SYN is connected to the base of the transistor TR 1 through a capacitor C 5 connected in series, resistors R 9 and R 10 , and the capacitor C 5. ) And resistance (R 9 ), The output side of the operational amplifier OP 1 is connected to each connection point of R 10 through a resistor R 8 and a diode D 5 , and the collector of the transistor TR 1 is connected to a ground resistor R 11 and a capacitor ( C 6 ) is connected to the synchronous signal output terminal SYO. In the description of the drawing, the notation code Vcc is the power terminal.

이와 같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured in this way in detail as follows.

전원단자(Vcc)에 전원이 인가되고, 동기신호입력단자(SYN)로 제3a도에 도시한 바와 같이 정펄스신호가 입력되면, 그 정펄스신호는 콘덴서(C1) 및 다이오드(D1)를 통해 정형된 후 적분기(1)를 통해 제3b도에 도시한 바와 같이 적분되고, 정류기(2)를 통해 제3c도에 도시한 바와 같이 정류되어 연산증폭기(OP1)의 반전입력단자(-)에 인가된다. 여기서, 연산증폭기(OP1)의 비반전압력단자(+)에 인가되는 기준전압(Vref)이 그의 반전입력단자(-)에 인가되는 정펄스신호의 정류전압보다 높게 저항(R3), (R4)의 값을 설정하면, 연산증폭기(OP1)의 출력측에는 고전위가 출력되므로 다이오드(D3)에 역바이어스전압이 인가되어 오프되고, 이에 따라 동기신호입력단자(SYN)로 입력되는 정펄스신호는 콘덴서(C4) 및 저항(R6)을 통한 후, 저항(R5), (R7)에 의해 분할된 연산증폭기(OP1)의 출력전압과 함께 다이오드(D4)를 통해 동기신호출력단자(SYO)로 출력된다.When power is applied to the power supply terminal Vcc and a positive pulse signal is input to the synchronous signal input terminal SYN as shown in FIG. 3A, the positive pulse signal is converted into a capacitor C 1 and a diode D 1 . After integrating through the integrator (1) through the integrator as shown in Figure 3b, as shown in Figure 3c through the rectifier 2 as shown in Figure 3c through the inverting input terminal (OP 1 ) of the operational amplifier (OP 1 ) Is applied. Here, the operational amplifier (OP 1), the non-inverting pressure reference voltage (Vref) is applied to the terminal (+), whose inverting input terminal (-), resistance higher than the rectified voltage of the positive pulse signals applied to the (R 3), ( When the value of R 4 ) is set, a high potential is output to the output side of the operational amplifier OP 1 , so that a reverse bias voltage is applied to the diode D 3 to be turned off, thereby being input to the synchronization signal input terminal SYN. The constant pulse signal passes through the capacitor C 4 and the resistor R 6 , and then the diode D 4 together with the output voltage of the operational amplifier OP 1 divided by the resistors R 5 and R 7 . Through the synchronous signal output terminal (SYO).

그리고, 이때 연산증폭기(OP1)에서 출력된 고전위는 다이오드(D5) 및 저항(R10)을 통해 트랜지스터(TR1)의 베이스에 인가되므로 트랜지스터(TR1)는 계속 오프상태를 유지하여 그의 에미터 전위는 저전위로 된다.And, at this time a high potential output from the operational amplifier (OP 1) is a diode (D 5) and a resistor (R 10) applied to the base of the transistor (TR 1) through so transistor (TR 1) is kept to continue the OFF state Its emitter potential becomes low potential.

한편, 제4a도에 도시한 바와 같이 동기신호입력 단자(SYN)로 부펄스신호가 입력되면, 그 부펄스신호는 적분기(1)를 통해 제4b도에 도시한 바와 같이 적분되고, 정류기(2)를 통해 제4c도에 도시한 바와 같이 정류된 후 연산증폭기(OP1)의 반전입력단자(-)에 인가되므로 연산증폭기(OP1)는 반전입력단자(-)에 인가되는 전압이 그의 비반전입력단자(+)에 인가되 기준전압(Vref)보다 높아 저전위를 출력하게 된다. 따라서, 콘덴서(C4) 및 저항(R6)을 통한 동기신호입력단자(SYN)이 부펄스신호는 다이오드(D3)를 통해 연산증폭기(OP1)의 출력측으로 흐르게 되어 동기신호출력단자(SYO)로는 출력되지 않고, 콘덴서(C5)를 통한 부펄스신호는 저항(R9, R10)을 통해 트랜지스터(TR1)의 베이스에 인가되어 그가 온·오프를 반복 즉, 부펄스신호가 저전위일 경우에는 트랜지스터(TR1)가 온되어 제4d도에 도시한 바와 같이 전언단자(Vcc)의 전원이 트랜지스터(TR1) 및 콘덴서(C6)를 통해 동기신호출력단자(SYO)로 출력되고, 부펄스신호가 고전위 일 경우에는 트랜지스티(TR1)가 오프되어 저전위가 출력되므로 동기신호출력단자(SYO)에는 부펄스신호가 정펄스신호를 변화되어 출력된다.On the other hand, when the sub-pulse signal is input to the synchronization signal input terminal SYN as shown in FIG. 4A, the sub-pulse signal is integrated through the integrator 1 as shown in FIG. 4B, and the rectifier 2 since applied to) the operational amplifier (OP 1) has an inverting input terminal (-) via an inverting input terminal (of the operational amplifier (OP 1), and then rectified, as illustrated in 4c is also the voltage to be applied to) its non- It is applied to the inverting input terminal (+) and outputs a low potential higher than the reference voltage Vref. Therefore, the synchronous signal input terminal SYN through the capacitor C 4 and the resistor R 6 flows the negative pulse signal to the output side of the operational amplifier OP 1 through the diode D 3 , thereby synchronizing the signal output terminal ( Is not output to SYO, and the negative pulse signal through the capacitor C 5 is applied to the base of the transistor TR 1 through the resistors R 9 and R 10 so that the negative pulse signal is repeatedly turned on and off. In the case of the low potential, the transistor TR 1 is turned on, and as shown in FIG. 4D, the power supply of the message terminal Vcc is supplied to the synchronous signal output terminal SYO through the transistor TR 1 and the capacitor C 6 . When the negative pulse signal has a high potential, the transistor TR 1 is turned off and the low potential is output. Therefore, the negative pulse signal is changed and outputted to the synchronous signal output terminal SYO.

이상에서 설명한 바와 같이 본 고안은 입력되는 동기신호가 정펄스신호나 부펄스신호에 관계없이 정펄스신호로 변환하여 출력시키므로 종래와 같이 동기신호가 정펄스신호인지 부펄스신호인지를 일일이 확인할 필요가 없음은 물론 별도의 스위치를 절환시킬 필요가 없어 사용자의 번거로움을 제거할 수 있는 효과가 있다.As described above, the present invention converts the input synchronization signal into a positive pulse signal regardless of the positive pulse signal or the negative pulse signal, and outputs it. Therefore, it is necessary to check whether the synchronization signal is the positive pulse signal or the negative pulse signal as before. Of course, there is no need to switch a separate switch, there is an effect that can eliminate the user's hassle.

Claims (1)

동기신호입력 단자(SYN)을 비반전입력단자(+)에 기준전압이 인가되는 연산증폭기(OP1)의 반전입력단자(-)에 적분기(1) 및 정류기(2)를 통해 접속하고, 그 동기신호입력단자(SYN)를 콘덴서(C4) 및 저항(R6)을 통해 저항(R7)에 접속하여 그 접속점을 다이오드(D3) 및 저항(R5)과, 다이오드(D4)를 각기 통해 연산증폭기(OP1)의 출력단자 및 동기신호출력단자(SYO)에 접속하고, 동기신호입력단자(SYN)를 콘덴서(C5) 및 저항(R9, R10)을 통해 트랜지스터(TR1)의 베이스에 접속하여 그의 콜렉터를 콘덴서(C6)를 통해 상기 동기신호출력단자(SYO)에 접속하며, 상기 연산증폭기(OP1)의 출력단자를 저항(R8) 및 다이오드(D5)를 각기 통해 상기 저항(R9)의 양단에 접속하여 구성된 것을 특징으로 하는 동기신호 스위칭회로.The synchronous signal input terminal SYN is connected to the inverting input terminal (-) of the operational amplifier OP 1 to which the reference voltage is applied to the non-inverting input terminal (+) through the integrator 1 and the rectifier 2, and The synchronous signal input terminal SYN is connected to the resistor R7 through the capacitor C4 and the resistor R6, and the connection point thereof is connected to the diode D3 and the resistor R5 and the diode D4 through the operational amplifier ( Connect to the output terminal of OP1) and the synchronous signal output terminal SYO, and connect the synchronous signal input terminal SYN to the base of the transistor TR1 through the capacitor C5 and the resistors R9 and R10 to connect the collector thereof. The synchronous signal output terminal SYO is connected through a capacitor C6, and the output terminal of the operational amplifier OP1 is connected to both ends of the resistor R9 through a resistor R8 and a diode D5, respectively. Synchronous signal switching circuit, characterized in that configured.
KR2019860007450U 1986-05-27 1986-05-27 Synchronizing signal switching circuit KR900000708Y1 (en)

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KR2019860007450U KR900000708Y1 (en) 1986-05-27 1986-05-27 Synchronizing signal switching circuit

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KR870019249U KR870019249U (en) 1987-12-28
KR900000708Y1 true KR900000708Y1 (en) 1990-01-30

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