KR870011766A - 300/1200 bit per second combined modem transceiver - Google Patents

300/1200 bit per second combined modem transceiver Download PDF

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Publication number
KR870011766A
KR870011766A KR1019860003625A KR860003625A KR870011766A KR 870011766 A KR870011766 A KR 870011766A KR 1019860003625 A KR1019860003625 A KR 1019860003625A KR 860003625 A KR860003625 A KR 860003625A KR 870011766 A KR870011766 A KR 870011766A
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KR
South Korea
Prior art keywords
output
circuit
signal
data
received
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KR1019860003625A
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Korean (ko)
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KR890003762B1 (en
Inventor
김낙민
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삼성전자 주식회사
한형수
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Priority to KR1019860003625A priority Critical patent/KR890003762B1/en
Publication of KR870011766A publication Critical patent/KR870011766A/en
Application granted granted Critical
Publication of KR890003762B1 publication Critical patent/KR890003762B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Telephonic Communication Services (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

내용 없음No content

Description

300/1200 비트퍼세크 겸용모뎀 송수신회로300/1200 bit per second combined modem transceiver

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

제1도는 본 발명에 따른 회로도.1 is a circuit diagram according to the present invention.

Claims (1)

전이중 통신기능을 갖게하는 하이브 리드회로(50)와, 전환교환선에 모뎀의 전송선을 매칭시키는 데이터 엑세스 어렌지먼트(60)을 구비한 300/1200bps겸용모뎀 송수신회로에 있어서, 오리지네이트 또는 엔서모드의 트랜스미트데이터를 입력하여 다이비트 변조를 행하여 병렬로 데이터를 출력하는 동시에 제1,2선택제어신호 및 콘트롤신호를 출력하며 입력되는 수신직렬데이터를 디스크램블하여 출력하는 중앙처리장치부(10)와, 상기 중앙처리장치부(10)에서 다이비트 변조된 병렬데이터를 입력하여 샘풀링 아나로그 신호를 출력하는 디지털/아나로그 변환회로(20)와, 상기 중앙처리장치부(10)에서 출력되는 모드콘트롤 신호를 입력하여 모드선택신호 +5V, -5V를 선택출력하는 모드콘트롤 선택출력회로(400)와, 중앙처리장치부(10)의 콘트롤 신호와 모드콘트롤 선택출력회로(400)에서 출력되는 모드선택신호에 따라 터미날에서 출력되는 트랜스미트데이터와 입력되는 수신아나로그 신호를 변조 및 복조를 행하여 출력하는 모뎀회로(30)와, 샘플링된 송신아나로그신호 또는 수신아나로그 신호를 입력하여 상기 모드 콘트롤 선택출력회로(400)서 출력되는 모드 필터하이브리드회로 (50)을 통해 입력되는 수신아나로그신호아 상기 밴드패스터(40)에서 스므싱필터되어 출력되는 수신아나로그신호를 제1선택 제어신호에 의해서 선택출력하는 제1멀티풀렉서(70)와, 사기 제1멀티플렉서(70)에서 출력되는 신호를 입력하여 직렬디지탈데이터신호로 복조하여 출력하는 복조회로(80)와, 상기 모뎀직접회로(30)와 상기 중앙처리장치(10)에서 출력되는 수신직렬데이터를 입력하여 제2선택 제어신호에 따라서 수신데이터를 선택출력하는 제2멀티풀렉서(90)로 구성함을 특징으로 하는 300bps/1200bps 겸용모뎀 송수신회로.In a 300/1200 bps combined modem transmission / reception circuit including a hybrid circuit 50 having a full-duplex communication function and a data access arrangement 60 for matching a transmission line of a modem to a switching exchange line, the original or engineer mode. A central processing unit (10) for inputting transmit data of the first and second bits to perform dibit modulation to output data in parallel, and to output first and second selection control signals and control signals, and to descramble and output the received serial data; And a digital / analog conversion circuit 20 for outputting a sampling analog signal by inputting parallel data modulated by the central processing unit 10 and a mode control signal output from the central processing unit 10. The control signal and mode control of the mode control selection output circuit 400 and the central processing unit 10 to output the mode selection signals + 5V and -5V A modem circuit 30 for modulating and demodulating the transmit data output from the terminal and the received analog signal according to the mode selection signal output from the selective output circuit 400, and the sampled transmit analog signal or A received analog signal inputted through a mode filter hybrid circuit 50 which is inputted from the mode control select output circuit 400 by inputting a received analog signal and received by being filtered out of the band pasteer 40. A demodulation circuit for inputting a signal output from the first multiplexer 70 to selectively output the analog signal by the first selection control signal, and a signal output from the fraudulent first multiplexer 70 to demodulate and output the serial digital data signal. 80 and received serial data outputted from the modem integrated circuit 30 and the central processing unit 10 to select and receive received data according to a second selection control signal. 300bps / 1200bps combined modem transmission and reception circuit, characterized in that consisting of a second multiplexer (90). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019860003625A 1986-05-09 1986-05-09 Modem trans/receiving circuit KR890003762B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019860003625A KR890003762B1 (en) 1986-05-09 1986-05-09 Modem trans/receiving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019860003625A KR890003762B1 (en) 1986-05-09 1986-05-09 Modem trans/receiving circuit

Publications (2)

Publication Number Publication Date
KR870011766A true KR870011766A (en) 1987-12-26
KR890003762B1 KR890003762B1 (en) 1989-10-04

Family

ID=19249864

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860003625A KR890003762B1 (en) 1986-05-09 1986-05-09 Modem trans/receiving circuit

Country Status (1)

Country Link
KR (1) KR890003762B1 (en)

Also Published As

Publication number Publication date
KR890003762B1 (en) 1989-10-04

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