KR0120835B1 - Frequency voltage conversion circuit for monitor - Google Patents

Frequency voltage conversion circuit for monitor

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Publication number
KR0120835B1
KR0120835B1 KR1019940024941A KR19940024941A KR0120835B1 KR 0120835 B1 KR0120835 B1 KR 0120835B1 KR 1019940024941 A KR1019940024941 A KR 1019940024941A KR 19940024941 A KR19940024941 A KR 19940024941A KR 0120835 B1 KR0120835 B1 KR 0120835B1
Authority
KR
South Korea
Prior art keywords
voltage
monitor
conversion circuit
voltage conversion
frequency voltage
Prior art date
Application number
KR1019940024941A
Other languages
Korean (ko)
Inventor
이석구
Original Assignee
배순훈
대우전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 배순훈, 대우전자주식회사 filed Critical 배순훈
Priority to KR1019940024941A priority Critical patent/KR0120835B1/en
Application granted granted Critical
Publication of KR0120835B1 publication Critical patent/KR0120835B1/en

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Abstract

An apparatus for converting frequency to voltage of monitor is disclosed. The apparatus for converting frequency to voltage of monitor comprises a microprocessor(11), a buffer(14), an amlifier(15), and a limited voltage generator(16). In the apparatus for converting frequency to voltage, a control signal from the microprocessor(11) of which frequency is converted to voltage is outputted through the amplifier(15), a limited voltage from the limited voltage generator(16) is outputted if there is no control signal from the microprocessor(11) and the limited voltage is outputted if the limited voltage is larger than the output voltage. Thereby, an output voltage of monitor can be keep in a constant value and the monitor can become stable.

Description

모니터의 주파수 전압 변환회로Frequency Voltage Conversion Circuit of Monitor

제1도는 일반적인 모니터의 주파수 전압 변환회로의 구성을 보인 도면.1 is a diagram showing the configuration of a frequency voltage conversion circuit of a general monitor.

제2도는 본발명에 따른 모니터의 주파수 전압 변환회로의 구성을 보인 도면.2 is a view showing the configuration of the frequency voltage conversion circuit of the monitor according to the present invention.

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

11 : 마이크로 프로세서 12 : 정형부11: microprocessor 12: shaping part

13 : 평할부 14 :버퍼부13: flat part 14: buffer part

15 : 증폭부 16 : 리미트 전압 발생부15: amplifier 16: limit voltage generator

R11,R21,R41-R43,R41,R61-R63,R100: 저항 C21,C31 : 콘덴서R11, R21, R41-R43, R41, R61-R63, R100: Resistor C21, C31: Capacitor

Q61 : 트랜지스터 OP41,OP51 : 증폭부Q61: transistor OP41, OP51: amplifier

D61 : 다이오드.D61: diode.

본 발명은 모니터에 관한 것으로서, 특히, 마이크로 프로세서에서 출력되는 모드 전환 제어신호의 주파수를 그 주파수에 대응되는 전압으로 변환시키는 주파수 전압 변환회로에 관한 것이다.The present invention relates to a monitor, and more particularly, to a frequency voltage conversion circuit for converting a frequency of a mode switching control signal output from a microprocessor into a voltage corresponding to the frequency.

일반적인 모니터의 주파수 전압 변환회로는 제1도에 도시된 바와 같이, 도면에 도시되지 않은 컴퓨터로부터 입력되는 수직동기신호 및 수평동기신호의 유무를 판단하여 모드를 설정하기 위한 제어신호를 출력시키는 마이크로 프로세서(1)에서 출력되는 제어신호는 저항(R1) 및 콘덴서(C1)의 시정수에 의해 적분되는 정형부(2)와, 저항(R2) 및 콘덴서(C2)로 구성되어 상기 정형부(2)에서 적분된 제어신호를 저항(R2)를 통해 콘덴서(C2)에 충방전시키는 평할부와(3)와, 저항(R3)-(R5) 및 증폭기(OP1)로 구성되어 입력되는 전압(Vcc)이 분배시킨 후 그 분배된 전압의 기준 전압을 정형시키는 버퍼부(4)와, 증폭기(OP2) 및 증폭도를 결정하는 저항(R6)로 구성되어 상기 평할부(3)에서 방전되는 전압과 버퍼부(4)에서 출력되는 전압을 비교한후 증폭시키는 증폭부(5)와, 저항(R7)-(R10) 및 트랜지스터(Q1)로 구성되어 저항As shown in FIG. 1, the frequency voltage conversion circuit of a general monitor may include a microprocessor that determines whether there is a vertical synchronization signal and a horizontal synchronization signal input from a computer (not shown) and outputs a control signal for setting a mode. The control signal output from (1) is composed of a shaping part 2 integrated by the time constants of the resistor R1 and the capacitor C1, and the resistor R2 and the capacitor C2. The voltage Vcc, which is composed of a flat part 3 for charging and discharging the integrated control signal integrated in the capacitor C2 to the capacitor C2 through the resistor R2, and resistors R3 to R5 and the amplifier OP1. After the distribution, the buffer unit 4 for shaping the reference voltage of the divided voltage, the amplifier OP2, and the resistor R6 for determining the amplification degree, and the voltage and the buffer unit discharged from the flat unit 3 An amplifier 5 for comparing and amplifying the voltage output from (4) and resistors R7- (R1); 0) and transistor Q1 consists of resistors

저항(R61)(R62)와, 상기 저항(R61)(R62)의 분배에 의해 발생된 리미트 전압(VL에 의해 스위칭되는 트랜지스터(Q61)와, 상기 트랜지스터(Q61)의 전류를 제어하는 저항(R63)과, 상기 트랜지스터(Q61)를 통과한 리미트 전압(VL)이 증폭부의 출력전압(Vo)보다 크면, 도통되어 리미트 전압(VL)이 증폭부에서 출력되는 다이오드(D61)로 구성됨을 특징으로 하는 모니터의 주파수 전압 변환회로.The resistors R61 and R62, the transistor Q61 switched by the limit voltage VL generated by the distribution of the resistors R61 and R62, and the resistor R63 for controlling the current of the transistor Q61. ), And when the limit voltage VL passing through the transistor Q61 is greater than the output voltage Vo of the amplifying unit, the diode D61 is turned on so that the limit voltage VL is output from the amplifying unit. Frequency voltage conversion circuit of the monitor.

Claims (1)

내용 없음.No content.
KR1019940024941A 1994-09-30 1994-09-30 Frequency voltage conversion circuit for monitor KR0120835B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940024941A KR0120835B1 (en) 1994-09-30 1994-09-30 Frequency voltage conversion circuit for monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940024941A KR0120835B1 (en) 1994-09-30 1994-09-30 Frequency voltage conversion circuit for monitor

Publications (1)

Publication Number Publication Date
KR0120835B1 true KR0120835B1 (en) 1997-10-22

Family

ID=19394069

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940024941A KR0120835B1 (en) 1994-09-30 1994-09-30 Frequency voltage conversion circuit for monitor

Country Status (1)

Country Link
KR (1) KR0120835B1 (en)

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