JPS56161737A - Data transmitter - Google Patents

Data transmitter

Info

Publication number
JPS56161737A
JPS56161737A JP6508280A JP6508280A JPS56161737A JP S56161737 A JPS56161737 A JP S56161737A JP 6508280 A JP6508280 A JP 6508280A JP 6508280 A JP6508280 A JP 6508280A JP S56161737 A JPS56161737 A JP S56161737A
Authority
JP
Japan
Prior art keywords
clock pulse
impedance
data collecting
data
terminal
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
JP6508280A
Other languages
Japanese (ja)
Inventor
Ichiro Yoshihara
Kiyoshi Sone
Kiyoshi Abe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6508280A priority Critical patent/JPS56161737A/en
Publication of JPS56161737A publication Critical patent/JPS56161737A/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
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines

Abstract

PURPOSE:To decrease the voltage loss due to rectifier circuits, by increasing the change width of a clock pulse at a data collecting station, through the reception of the clock pulse by means of a current at a terminal station, when a switching element is on. CONSTITUTION:The presence of data at a terminal device II is detected at 20 with a clock pulse A sent from a data collecting station to make on/off control of a switching element TR1, and the difference in the impedance for the case is read in at the data collecting station as the change B in the clock pulse. In the terminal device II with such a data transmission system, a transistor TR2 is provided to receive a clock pulse with a voltage when the element TR1 is off and the impedance is great, and to receive the clock pulse with a current when the element TR1 is on and the impedance is small. Further, a rectifier circuit in which a diode D0 and a transistor TR3 are connected in parallel, is provided to rectify the clock pulse and to obtain the power supply for the terminal II.
JP6508280A 1980-05-15 1980-05-15 Data transmitter Pending JPS56161737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6508280A JPS56161737A (en) 1980-05-15 1980-05-15 Data transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6508280A JPS56161737A (en) 1980-05-15 1980-05-15 Data transmitter

Publications (1)

Publication Number Publication Date
JPS56161737A true JPS56161737A (en) 1981-12-12

Family

ID=13276657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6508280A Pending JPS56161737A (en) 1980-05-15 1980-05-15 Data transmitter

Country Status (1)

Country Link
JP (1) JPS56161737A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2433364A (en) * 2005-12-16 2007-06-20 Nokia Corp A handset to headset connection which conveys power, data, and audio signals

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52109804A (en) * 1976-01-09 1977-09-14 Post Office Data transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52109804A (en) * 1976-01-09 1977-09-14 Post Office Data transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2433364A (en) * 2005-12-16 2007-06-20 Nokia Corp A handset to headset connection which conveys power, data, and audio signals
GB2433364B (en) * 2005-12-16 2011-06-08 Nokia Corp Interface between a terminal and an asic of a peripheral device

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