JPS55118243A - Signal transmission unit - Google Patents

Signal transmission unit

Info

Publication number
JPS55118243A
JPS55118243A JP2656579A JP2656579A JPS55118243A JP S55118243 A JPS55118243 A JP S55118243A JP 2656579 A JP2656579 A JP 2656579A JP 2656579 A JP2656579 A JP 2656579A JP S55118243 A JPS55118243 A JP S55118243A
Authority
JP
Japan
Prior art keywords
output
input signal
terminal
circuit
photo
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2656579A
Other languages
Japanese (ja)
Inventor
Masaaki Sasaki
Takanori Tsunoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissin Electric Co Ltd
Original Assignee
Nissin Electric Co Ltd
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 Nissin Electric Co Ltd filed Critical Nissin Electric Co Ltd
Priority to JP2656579A priority Critical patent/JPS55118243A/en
Publication of JPS55118243A publication Critical patent/JPS55118243A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H04L25/4923—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using ternary codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable to transmit the ternary signal very easily with the transmission line of the same constitution conventionally, by combining the output of two sets of photo couplers where the respective light emitting elements are in antiparallel connection at the logic circuit in the reception section. CONSTITUTION:When the first input signal I1 is at H and the second input signal I2 is at L, since the output H is present from the first drive circuit 11, only the first photo coupler 21 is ON and output is obtained at the terminal T1. When the first input signal I1 is at L and the second input signal I0 is at H, since the output H is present from the second driver circuit 12, only the second photo coupler 22 is ON and output is obtained at the terminal T2. When the second input signal I2 is at L, the output of the first and second driver circuits 11, 12 is both at L and the first and second photo couplers 21 and 22 are both OFF and output is obtained at the terminal T3 via the AND circuit 25.
JP2656579A 1979-03-06 1979-03-06 Signal transmission unit Pending JPS55118243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2656579A JPS55118243A (en) 1979-03-06 1979-03-06 Signal transmission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2656579A JPS55118243A (en) 1979-03-06 1979-03-06 Signal transmission unit

Publications (1)

Publication Number Publication Date
JPS55118243A true JPS55118243A (en) 1980-09-11

Family

ID=12197054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2656579A Pending JPS55118243A (en) 1979-03-06 1979-03-06 Signal transmission unit

Country Status (1)

Country Link
JP (1) JPS55118243A (en)

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