KR910009023A - Telephone dial detection circuit - Google Patents

Telephone dial detection circuit Download PDF

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Publication number
KR910009023A
KR910009023A KR1019890014906A KR890014906A KR910009023A KR 910009023 A KR910009023 A KR 910009023A KR 1019890014906 A KR1019890014906 A KR 1019890014906A KR 890014906 A KR890014906 A KR 890014906A KR 910009023 A KR910009023 A KR 910009023A
Authority
KR
South Korea
Prior art keywords
relay
led
emitting diode
diode
detection circuit
Prior art date
Application number
KR1019890014906A
Other languages
Korean (ko)
Other versions
KR920002954B1 (en
Inventor
김대성
이승우
Original Assignee
이만용
금성반도체 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 이만용, 금성반도체 주식회사 filed Critical 이만용
Priority to KR1019890014906A priority Critical patent/KR920002954B1/en
Publication of KR910009023A publication Critical patent/KR910009023A/en
Application granted granted Critical
Publication of KR920002954B1 publication Critical patent/KR920002954B1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/02Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

내용 없음.No content.

Description

전화다이얼 감지회로Telephone dial detection circuit

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

제1도는 본 발명의 회로도.1 is a circuit diagram of the present invention.

Claims (1)

저항(R1)이 양단에 연결된 국선(La,Lb)은 다이악(V1,V2)을 통해 접지하되 국선(La)은 릴레이(RL1)와 매칭용 트랜스(T2)를 통해 국선(Lb)에 연결하고, 병렬로 연결된 트랜스(T1)와 제너다이오드(ZD1,ZD2)를 거쳐 국선(La)에 연결된 릴레이(RL2)의 일단은 저항(R2), 다이오드(D1), 광결합기(1)의 발광다이오드(LED1) 및 전류 제한용 부스터(PD)를 통해 국선(Lb)에 연결하며, 다이오드(D1)와 발광다이오드(LED1)의 접속점은 저항(R3)을 통해 릴레이(RL2)의 타단에 연결하되, 릴레이(RS2)의 타단은 제너다이오드(ZD3,ZD4)를 통해 발광다이오드(LED1)와 전류 제한용 부스터(PD)의 접속점에 연결하고, 발광다이오드(LED1)의 양단에는 역전류 방지용 다이오드(D2)를 연결하며, 수광트랜지스터(Q1)의 콜렉터에 베이스가 연결된 에미터 접지 트랜지스터(Q2)의 콜렉터는 사설교환기(2)의 입력단에 연결하여서 구성된 전화다이얼 감지회로.Trunk lines (La, Lb) connected at both ends of the resistor (R 1 ) are grounded through the diacs (V 1 , V 2 ), while trunk lines (La) are trunked via the relay (RL 1 ) and the matching transformer (T 2 ). One end of the relay RL 2 connected to (Lb) and connected to the trunk line La via a transformer (T 1 ) and zener diodes (ZD 1 , ZD 2 ) connected in parallel is a resistor (R 2 ) and a diode (D). 1), through a light emitting diode (LED 1) and for current limitation booster (PD) of the optical coupler (1) and connected to the trunk line (Lb), the connection point of the diode (D 1) and a light emitting diode (LED 1) is the resistance ( R 3 ) is connected to the other end of the relay (RL 2 ), and the other end of the relay (RS 2 ) is connected to the light emitting diode (LED 1 ) and the current limiting booster (PD) through the zener diodes (ZD 3 , ZD 4 ). connected to the connection point, and the collector of the light-emitting diode (LED 1) and is connected to the reverse current-preventing diode (D 2) at both ends of the light-receiving transistor (Q 1) emitter grounded transistor (Q 2) the base is connected to the collector of the Telephone dial detection circuit configured hayeoseo connected to the input of the sermon ventilation (2). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890014906A 1989-10-17 1989-10-17 Dial signal detecting circuit KR920002954B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890014906A KR920002954B1 (en) 1989-10-17 1989-10-17 Dial signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890014906A KR920002954B1 (en) 1989-10-17 1989-10-17 Dial signal detecting circuit

Publications (2)

Publication Number Publication Date
KR910009023A true KR910009023A (en) 1991-05-31
KR920002954B1 KR920002954B1 (en) 1992-04-10

Family

ID=19290766

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890014906A KR920002954B1 (en) 1989-10-17 1989-10-17 Dial signal detecting circuit

Country Status (1)

Country Link
KR (1) KR920002954B1 (en)

Also Published As

Publication number Publication date
KR920002954B1 (en) 1992-04-10

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