KR920020913A - Door phone interface circuit in key phone system - Google Patents

Door phone interface circuit in key phone system Download PDF

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Publication number
KR920020913A
KR920020913A KR1019910006442A KR910006442A KR920020913A KR 920020913 A KR920020913 A KR 920020913A KR 1019910006442 A KR1019910006442 A KR 1019910006442A KR 910006442 A KR910006442 A KR 910006442A KR 920020913 A KR920020913 A KR 920020913A
Authority
KR
South Korea
Prior art keywords
signal
switch
output
coupler
control unit
Prior art date
Application number
KR1019910006442A
Other languages
Korean (ko)
Inventor
한철희
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 KR1019910006442A priority Critical patent/KR920020913A/en
Publication of KR920020913A publication Critical patent/KR920020913A/en

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  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

내용 없음.No content.

Description

키폰 시스템에서의 도어폰 인터페이스 회로Door phone interface circuit in key phone system

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

제2도는 본 발명의 회로도.2 is a circuit diagram of the present invention.

Claims (1)

중앙제어부(101)와 타임스위치(102)를 구비한 키폰 시스템에 있어서, 상기 타임스위치(102)로 부터 디지탈상태로 코드화된 음성신호를 받아 아날로그 신호로 변환 출력하고, 소정 아날로그 음성신호가 입력되면 디지탈 신호로 변환하여 상기 타임스위치(102)로 출력하는 신호변환수단(20)과, 상기 신호변환수단(20)이 상기 타임스위치(102)로 부터 받은 디지탈신호를 아날로그 신호로 변환출력할 때 그를 받아 증폭하여 출력하는 제1증폭기(30)와, 상기 제1증폭기(30)의 출력을 교류 유도 커플링 하는 제1결합기(40)와, 상기 제1결합기(40)의 출력을 가청신호로 변환출력하는 스피커(SP)와, 소정 음성 신호를 전기신호로 변환출력하는 마이크(MC)와, 상기 마이크(MC)의 음성 전기 신호 출력을 받아 교류 유도 커플링하는 제2결합기(50)와, 상기 제2결합기(50)의 출력을 받아 증폭한뒤 상기 디지탈로 변환되도록 신호변환수단에 공급하는 제2증폭기(60)와, 상기 마이크(MC)의 신호라인과 상기 스피커(SP)의 접지사이에 접속된 호출스위치(SW)와, 상기 호출스위치(SW)의 타단과 상기 중앙제어부(101)간에 접속하여 상기 호출스위치(SW)의 스위칭신호를 검출하여 상기 중앙제어부(101)에 전송하는 호출검출부(10)와, 도어를 개폐시키는 도어개폐기(70)와, 상기 중앙제어부(101)로 부터 개폐신호를 받아 상기 도어개폐기(70)를 개폐시키는 드라이버(80)로 구성함을 특징으로 하는 키폰 시스템에서의 도어폰 인터페이스 회로.In a key phone system having a central control unit 101 and a time switch 102, a digital signal coded from the time switch 102 is received and converted into an analog signal, and a predetermined analog voice signal is inputted. Signal converting means 20 for converting to a digital signal and outputting to the time switch 102, and when the signal converting means 20 converts and outputs a digital signal received from the time switch 102 to an analog signal; Converts the output of the first amplifier 30, the first coupler 40 for ac inductively coupling the output of the first amplifier 30, and the output of the first coupler 40 into an audible signal A speaker (SP) for outputting, a microphone (MC) for converting and outputting a predetermined voice signal into an electrical signal, a second coupler (50) for receiving AC electrical output from the microphone (MC) and inductively coupling, and Receiving the output of the second coupler (50) A second amplifier 60 for supplying the signal converting means to be converted into the digital after being widened, a call switch SW connected between the signal line of the microphone MC and the ground of the speaker SP, and the call. A call detection unit 10 connected between the other end of the switch SW and the central control unit 101 to detect a switching signal of the call switch SW, and transmit the detected signal to the central control unit 101; And a driver (80) for opening and closing the door switch (70) by receiving an open / close signal from the central control unit (101). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910006442A 1991-04-22 1991-04-22 Door phone interface circuit in key phone system KR920020913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910006442A KR920020913A (en) 1991-04-22 1991-04-22 Door phone interface circuit in key phone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910006442A KR920020913A (en) 1991-04-22 1991-04-22 Door phone interface circuit in key phone system

Publications (1)

Publication Number Publication Date
KR920020913A true KR920020913A (en) 1992-11-21

Family

ID=67432892

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910006442A KR920020913A (en) 1991-04-22 1991-04-22 Door phone interface circuit in key phone system

Country Status (1)

Country Link
KR (1) KR920020913A (en)

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WITN Withdrawal due to no request for examination