KR890001657Y1 - Power source voltage variation detection circuit - Google Patents
Power source voltage variation detection circuit Download PDFInfo
- Publication number
- KR890001657Y1 KR890001657Y1 KR2019850018078U KR850018078U KR890001657Y1 KR 890001657 Y1 KR890001657 Y1 KR 890001657Y1 KR 2019850018078 U KR2019850018078 U KR 2019850018078U KR 850018078 U KR850018078 U KR 850018078U KR 890001657 Y1 KR890001657 Y1 KR 890001657Y1
- Authority
- KR
- South Korea
- Prior art keywords
- detection circuit
- power supply
- voltage
- power source
- source voltage
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
본 고안은 마이크로 프로세서를 이용한 시스템이나 모니터 구동회로의 전원전압이 기준치 이하로 낮아지는것을 비교기로 검출하여 전원전압변동을 알려주는 신호를 출력토록한 전원전압변동 검출회로의 구성에 관한 것이다.The present invention relates to a configuration of a power supply voltage fluctuation detection circuit which outputs a signal informing the power supply voltage fluctuation by detecting a comparator that the power supply voltage of a system using a microprocessor or a monitor driving circuit falls below a reference value.
종래에는 마이크로 프로세서의 각 시스템에 따라 별개의 전원전압 변동검출회로를 구성하였으므로 회로구성이 복잡하여 순간적인 전압변화에도 필요이상으로 과민한 동작을 하게되는 문제점이 있었다.In the related art, since a separate power supply voltage fluctuation detection circuit is configured according to each system of the microprocessor, there is a problem in that the circuit configuration is complicated, thereby making the operation more sensitive than the instantaneous voltage change.
본 고안은 이와같은 문제점을 해결하기 위하여 마이크로 프로세서의 각 시스템의 두 전원전압을 하나의 검출회로에 입력시켜 그 두전원의 불안전함을 동시에 검출하여 신호를 발생시켜줌과 동시에 전원의 순간적인 전압변동은 동작하지 않게 하여 전원공급의 안정성을 높이고 회로구성을 간단히하며 전원전압 변동의 검출한계를 손쉽게 조정하는 회로를 제공함을 목적으로하며 이하 첨부된 도면을 참조하여 본 고안의 구성 및 작용효과를 설명하면 다음과 같다.In order to solve this problem, the present invention inputs two power supply voltages of each system of the microprocessor into one detection circuit, detects the instability of the two power supplies simultaneously, generates a signal, and at the same time, instantaneous voltage fluctuation of the power supply operates. The purpose of the present invention is to provide a circuit for improving the stability of the power supply, simplifying the circuit configuration, and easily adjusting the detection limit of fluctuations in power supply voltage. The configuration and effect of the present invention will be described below with reference to the accompanying drawings. same.
본고안의 회로구성은 제1도에 도시된 바와같이,As shown in FIG. 1, the circuit configuration of the present invention is as follows.
비교기(1,2)의 반전입력단자(-)는 제너다이오드(D1)로 설정된 비교기준전압 분압용저항(R2,R3)에 공통접속하고, 비반전입력단자(+)는 각각 저항(R5)과 콘덴서 ( C2)로된 순간 변화보상부(a) 및 저항(R7)과 콘덴서(C3)로 된 순간변화 보상(b)를 통해 비교전압(V1,V2)입력단자(3,4)에 연결하며, 비교기(1,2)의 출력은 공통으로 전압변동검출신호 출력단자(5)에 연결하여서된 것으로서, Vcc는 전원, R1,R4,R6,R8은 저항, D2는 역전류 방지용 다이오드, C1는 평활용 다이오드, C4는 잡음방지용 콘덴서이다.The inverting input terminals (-) of the comparators (1, 2 ) are commonly connected to the reference voltage divider resistors (R 2 , R 3 ) set to the zener diode (D 1 ), and the non-inverting input terminals (+) are respectively connected Comparative voltage (V 1 , V 2 ) through instantaneous change compensation part (a) consisting of (R 5 ) and capacitor (C 2 ) and instantaneous change compensation (b) consisting of resistor (R 7 ) and capacitor (C 3 ) It is connected to the input terminal (3, 4), the output of the comparator (1, 2) is commonly connected to the voltage fluctuation detection signal output terminal (5), Vcc is a power supply, R 1 , R 4 , R 6 , R 8 is the resistor, D 2 is the reverse current protection diode, C 1 is the smoothing diode, and C 4 is the noise prevention capacitor.
본 고안은 작용 효과는 제1도에서와 같이 전압변동을 감시하고자 하는 비교전원전압(V1)이 비교기(1)의 반전입력단자(-)에 가해지는 기준전압보다 낮아지면 비교기(1)의 출력은 로우가 되고 또 비교전원전압(V2)이 비교기(1)의 반전입력단자(-)에 가해지는 기준전압보다 낮아지면 비교기(2)의 출력은 로우가 된다.According to the present invention, as shown in FIG. 1, when the comparison power supply voltage V 1 to monitor the voltage fluctuation is lower than the reference voltage applied to the inverting input terminal (-) of the comparator 1, the comparator 1 The output of the comparator 2 goes low when the output goes low and the comparison power supply voltage V 2 is lower than the reference voltage applied to the inverting input terminal (-) of the comparator 1.
즉, 비교전압전원(V1,V2)중 어느 하나라도 기준치 이하로 낮아지면 출력단자 (5)에는 로우신호가 출력되므로 이 신호를 전원차단회로나 경보회로등에 공급하면 두 전원전압(V1,V2)이 이상이 있음을 표시할 수있게 된다.That is, if any one of the comparison voltage power supplies V 1 and V 2 falls below the reference value, a low signal is output to the output terminal 5. Therefore, when this signal is supplied to a power cutoff circuit or an alarm circuit, the two power supply voltages (V 1). , V 2 ) can indicate that there is an error.
그러나 비교전압(V1,V2)이 순간적으로 낮아졌다가 정상적으로 복구되었을때에는 콘덴서(C2,C3)에 충전되었던 전압이 저항(R5,R7)을 통해 방전되므로서 소정시간동안 비교기(1,2)의 비반전 입력단자(+)의 전위를 기준전압보다 높게 유지시켜 주므로서 과민한 동작을 방지하게 되는 것이다.However, when the comparison voltages (V 1 , V 2 ) are momentarily lowered and then restored normally, the voltage charged in the capacitors (C 2 , C 3 ) is discharged through the resistors (R 5 , R 7 ), so that the comparator ( By maintaining the potential of the non-inverting input terminal (+) of 1,2) above the reference voltage, sensitive operation is prevented.
이와같이 본 고안에 의하면 회로구성이 간단하고 또 과민한 동작을 방지하여 기기동작에 지장을 주는 일이 없게되며 회로소자(분압용저항)값만 가변시키면 다른 전원회로에는 적용할 수 있게 되어 보편성을 갖게 된 것이다.Thus, according to the present invention, the circuit configuration is simple and prevents sensitive operation, thereby preventing the operation of the device. When only the value of the circuit element (divisional resistance) is changed, it can be applied to other power supply circuits. will be.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850018078U KR890001657Y1 (en) | 1985-12-30 | 1985-12-30 | Power source voltage variation detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850018078U KR890001657Y1 (en) | 1985-12-30 | 1985-12-30 | Power source voltage variation detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870010802U KR870010802U (en) | 1987-07-13 |
| KR890001657Y1 true KR890001657Y1 (en) | 1989-04-07 |
Family
ID=19247700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850018078U KR890001657Y1 (en) | 1985-12-30 | 1985-12-30 | Power source voltage variation detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890001657Y1 (en) |
-
1985
- 1985-12-30 KR KR2019850018078U patent/KR890001657Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR870010802U (en) | 1987-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0580923A1 (en) | Circuit for detecting voltage variations in relation to a set value, for devices comprising errors amplifiers | |
| US5448175A (en) | Current detecting circuit | |
| JPH0118386B2 (en) | ||
| US4567539A (en) | Power interruption and brownout detector | |
| US4551668A (en) | Voltage sensing at loads remotely connected to power supplies | |
| JPH05121954A (en) | Potential detection circuit | |
| KR890001657Y1 (en) | Power source voltage variation detection circuit | |
| US5625305A (en) | Load detection apparatus | |
| US4228429A (en) | Alarm system having phase-sensitive bridge circuit | |
| KR940007118Y1 (en) | Ring-trip detector | |
| JP2606481B2 (en) | Automatic level trigger device | |
| KR830001481B1 (en) | Output voltage drop detection device of stabilized DC power supply | |
| JPH08223013A (en) | Overcurrent protection device for power transistor | |
| SU1764048A1 (en) | Direct current voltage flow-stabilizer | |
| KR930002350Y1 (en) | Abnormal voltage detecting circuit | |
| KR950006594Y1 (en) | Error conpensating circuit of switching regulator | |
| KR950002410Y1 (en) | Over current protecting circuit | |
| JPS6356564B2 (en) | ||
| JPH0431613Y2 (en) | ||
| KR890001157Y1 (en) | Detectoor for 3 phase sequence | |
| KR900008957Y1 (en) | Error protecting circuit of micro-computer | |
| US4612438A (en) | Light intensity sensor providing a variable output current | |
| KR0120314Y1 (en) | Overload relay | |
| JPH0244220Y2 (en) | ||
| KR940002333Y1 (en) | Control circuit of power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 19940326 Year of fee payment: 6 |
|
| LAPS | Lapse due to unpaid annual fee |