KR910006818A - Overvoltage Protection Circuit - Google Patents

Overvoltage Protection Circuit Download PDF

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Publication number
KR910006818A
KR910006818A KR1019890012980A KR890012980A KR910006818A KR 910006818 A KR910006818 A KR 910006818A KR 1019890012980 A KR1019890012980 A KR 1019890012980A KR 890012980 A KR890012980 A KR 890012980A KR 910006818 A KR910006818 A KR 910006818A
Authority
KR
South Korea
Prior art keywords
protection means
current
overvoltage
transistor
overvoltage protection
Prior art date
Application number
KR1019890012980A
Other languages
Korean (ko)
Inventor
유영익
최낙식
임창식
Original Assignee
김광호
삼성전자 주식회사
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019890012980A priority Critical patent/KR910006818A/en
Publication of KR910006818A publication Critical patent/KR910006818A/en

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  • Emergency Protection Circuit Devices (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음No content

Description

과전압 보호회로Overvoltage Protection Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명의 과전압 보호회로도.2 is an overvoltage protection circuit diagram of the present invention.

제5도는 본 발명에서 사용되는 전류원의 실시회로도.5 is an exemplary circuit diagram of a current source used in the present invention.

Claims (2)

전원(VCC)측에 연결된 저항(R1) 및 제어다이오드(10)로 구성된 과전압 보호수단(1)과 상기 과전압 보호수단(1)에 연결되어 입력전압(VCC)을 제한하는 과전압 및 전류보호수단(3)과, 입력전압(VCC)에 의하여 출력전압을 발생시키는 달링톤회로(2)와, 과전압 및 전류보호수단(3) 및 달링톤회로(2)사이에 연결된 과전류 보호수단(4)으로 구성되어 출력전압(Vo)이 발생되는 회로에 있어서, 상기한 가전압 보호수단(1)대신에 입력전압의 증가시에 변화폭이 적은 전류원(Is)이 사용되게 한 과전압 보호회로.Overvoltage protection means (1) consisting of a resistor (R1) and a control diode (10) connected to the power supply (VCC) side and overvoltage and current protection means connected to the overvoltage protection means (1) to limit the input voltage (VCC) ( 3) a Darlington circuit 2 for generating an output voltage by the input voltage VCC, and an overcurrent protection means 4 connected between the overvoltage and current protection means 3 and the Darlington circuit 2; A circuit in which an output voltage Vo is generated so that a current source Is with a small change width is used when the input voltage is increased instead of the provisional voltage protection means (1). 제1항에 있어서, 전류원(Is)은, 전류(I)를 공급하는 PNP트랜지스터(Q11)와, PNP트랜지스터(Q11)와 대칭적으로 연결된 PNP트랜지스터(Q10)와, 저항(R7)을 통하여 연결된 전류제한용트랜지스터(Q9)와, 상기 전류 제한용트랜지스터(Q9)의 제어를 받아 동작하는 트랜지스터(Q7)(Q8)로 구성되고, 트랜지스터(Q8)의 콜렉터측에 PNP트랜지스터(Q10)의 콜렉터측이 연결되게 구성시킨 과전압 보호회로.The current source Is of claim 1, wherein the current source Is is connected to the PNP transistor Q11, which supplies the current I, the PNP transistor Q10 symmetrically connected to the PNP transistor Q11, and via a resistor R7. It consists of a current limiting transistor Q9 and transistors Q7 and Q8 operated under the control of the current limiting transistor Q9, and on the collector side of the transistor Q8, the collector side of the PNP transistor Q10. Overvoltage protection circuit configured to be connected. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890012980A 1989-09-08 1989-09-08 Overvoltage Protection Circuit KR910006818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890012980A KR910006818A (en) 1989-09-08 1989-09-08 Overvoltage Protection Circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890012980A KR910006818A (en) 1989-09-08 1989-09-08 Overvoltage Protection Circuit

Publications (1)

Publication Number Publication Date
KR910006818A true KR910006818A (en) 1991-04-30

Family

ID=67661609

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890012980A KR910006818A (en) 1989-09-08 1989-09-08 Overvoltage Protection Circuit

Country Status (1)

Country Link
KR (1) KR910006818A (en)

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E902 Notification of reason for refusal
E601 Decision to refuse application