[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR930009318A - Zero cross detection circuit of ring signal - Google Patents

Zero cross detection circuit of ring signal Download PDF

Info

Publication number
KR930009318A
KR930009318A KR1019910018850A KR910018850A KR930009318A KR 930009318 A KR930009318 A KR 930009318A KR 1019910018850 A KR1019910018850 A KR 1019910018850A KR 910018850 A KR910018850 A KR 910018850A KR 930009318 A KR930009318 A KR 930009318A
Authority
KR
South Korea
Prior art keywords
resistor
charge
ring signal
detection circuit
diode
Prior art date
Application number
KR1019910018850A
Other languages
Korean (ko)
Inventor
구용갑
Original Assignee
정용문
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 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019910018850A priority Critical patent/KR930009318A/en
Publication of KR930009318A publication Critical patent/KR930009318A/en

Links

Landscapes

  • Electronic Switches (AREA)

Abstract

링신호를 이용하는 통신 시스템에 있어서 상기 링 신호의 제로크로스점을 검출하는 회로에 관한 것이다. 정확한 링 제로 크로스점을 검출하여 교환기등의 중앙처리장치에 인가해 줌으로서 그 시점에서 링 전원 공급용 릴레이를 온/오프 시켜 릴레이 접점을 보호해 준다.A communication system using a ring signal relates to a circuit for detecting a zero cross point of the ring signal. By detecting the correct ring zero cross point and applying it to the central processing unit such as the exchanger, the relay relay is protected by turning on / off the ring power supply relay at that point.

Description

링신호의 제로 크로스 검출 회로Zero cross detection circuit of ring signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 제로 크로스 검출 회로,3 is a zero cross detection circuit of the present invention,

제4도는 제3도의 비교기 입.출력과 제로 크로스 검출 파형도.4 is a comparator input / output and zero cross detection waveform diagram of FIG.

Claims (2)

링 신호의 상태 검출 회로에 있어서, 소정의 주기를 갖는 사인파를 출력하는 발전부(10)와, 비반전 단으로 상기 사인파를 입력하여 소정의 기준전압과 비교하는 비교기(COM)와, 상기 비교기(COM)의 출력 상태에 따라 충전 혹은 방전되는 충방전 수단(200)과, 상기 충방전 수단(200)이 방전할 때 상기 충반전 수산(200)의 캐패시턴스 값과 저항값의 시정수에 상응하는 듀티를 갖는 출력신호를 발생하는 출력수단(300)로 구성됨을 특징으로 하는 링신호의 제로 크로스 검출 회로.In the state detection circuit of a ring signal, a power generation unit 10 for outputting a sine wave having a predetermined period, a comparator COM for inputting the sine wave to a non-inverting stage and comparing it with a predetermined reference voltage, and the comparator ( Charge / discharge means 200 which is charged or discharged according to the output state of COM), and the duty corresponding to the capacitance value of the charge / discharge fisheries 200 and the time constant of the resistance value when the charge / discharge means 200 discharges. Zero cross detection circuit of the ring signal, characterized in that consisting of an output means for generating an output signal having a. 제1항에 있어서, 상기 충방전수단(200)을, 저(R5)을 통해 제1전원전압(V3)을 입력하는 다이오드(D5)를 상기 비교기(COM) 출력단에 연결하여 바이패스 회로를 형성하고, 상기 저항(R5)과 다이오드(D5)의접속점에 저항(R6)과 저항(R7)을 연결하며, 상기 두 저항(R6,R7)의 접속점과 접지 사이에 콘덴서(C1)를 접속하고, 상기 저항(R7)과 상기 출력수단(300) 사이에 포토커플러(PC)를 연결하며, 상기 포토커플러(PC)의 발광다이오드와 상기 비교기(COM)의 출력단에 다이오드(D6)를 접속하여 구성함을 특징으로 하는 회로.The bypass circuit of claim 1, wherein the charge / discharge unit 200 is connected to an output terminal of the comparator COM connecting a diode D5 for inputting a first power supply voltage V3 through a low R5. The resistor R6 and the resistor R7 are connected to the connection point of the resistor R5 and the diode D5, and the capacitor C1 is connected between the connection point of the two resistors R6 and R7 and ground. The photocoupler PC is connected between the resistor R7 and the output means 300, and the diode D6 is connected to the light emitting diode of the photocoupler PC and the output terminal of the comparator COM. Circuit characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910018850A 1991-10-25 1991-10-25 Zero cross detection circuit of ring signal KR930009318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910018850A KR930009318A (en) 1991-10-25 1991-10-25 Zero cross detection circuit of ring signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910018850A KR930009318A (en) 1991-10-25 1991-10-25 Zero cross detection circuit of ring signal

Publications (1)

Publication Number Publication Date
KR930009318A true KR930009318A (en) 1993-05-22

Family

ID=67348528

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910018850A KR930009318A (en) 1991-10-25 1991-10-25 Zero cross detection circuit of ring signal

Country Status (1)

Country Link
KR (1) KR930009318A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100475378B1 (en) * 2000-10-17 2005-03-10 엘지전자 주식회사 Control unit for ring relay of FXS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100475378B1 (en) * 2000-10-17 2005-03-10 엘지전자 주식회사 Control unit for ring relay of FXS

Similar Documents

Publication Publication Date Title
KR950030486A (en) Power-on reset circuit
DK1169763T3 (en) Protection circuit for an electronic device
ES2107350B1 (en) SURVEILLANCE CIRCUIT AND MICROCOMPUTER PROTECTION.
KR930003551A (en) Instant test mode designation circuit
KR930009318A (en) Zero cross detection circuit of ring signal
US5625305A (en) Load detection apparatus
US4469940A (en) Switching apparatus for absolute position measuring device
KR970078000A (en) Automatic reset circuit
KR940006505Y1 (en) Multi level battery voltage detector
SU1406607A1 (en) Operational scanning amplifier
KR910000601Y1 (en) Voltage regulator
KR0184499B1 (en) Inversion sensing circuit
KR950001957Y1 (en) Detecting circuit of electric discharge and thereof complete in pcb auto-tset regulation device
SU1764150A1 (en) Triangular shaped voltage generator
KR900000708Y1 (en) Synchronizing signal switching circuit
SU760440A1 (en) Voltage-to-time interval converter
JPS6241262Y2 (en)
JPS6125322Y2 (en)
KR910010281A (en) Key recognition device by PWM demodulation
KR900000669Y1 (en) Sequential timer circuit
KR960018596A (en) Disconnection detection circuit of analog input signal
KR920019219A (en) Rated power automatic control circuit for discharge tube
KR980003596A (en) Power supply voltage detector
KR890017853A (en) AC input automatic selection circuit in AC-DC converter
KR980006696A (en) Proper Power Detection Circuit

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination