JPS56140763A - Supply system of circuit current - Google Patents

Supply system of circuit current

Info

Publication number
JPS56140763A
JPS56140763A JP4215780A JP4215780A JPS56140763A JP S56140763 A JPS56140763 A JP S56140763A JP 4215780 A JP4215780 A JP 4215780A JP 4215780 A JP4215780 A JP 4215780A JP S56140763 A JPS56140763 A JP S56140763A
Authority
JP
Japan
Prior art keywords
circuit
voltage
resistance
showing
cal
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.)
Granted
Application number
JP4215780A
Other languages
Japanese (ja)
Other versions
JPS637498B2 (en
Inventor
Kazuo Hamasato
Shogo Usuda
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP4215780A priority Critical patent/JPS56140763A/en
Publication of JPS56140763A publication Critical patent/JPS56140763A/en
Publication of JPS637498B2 publication Critical patent/JPS637498B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/006—Circuits for increasing the range of current supply source

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To minimize the loss of electric power within a circuit current supply circuit and facilitate an easy formation of an IC, by controlling the voltage to be supplied to the line in accordance with the circuit resistance. CONSTITUTION:The resistance setting coefficient Krs corresponding to the DC resistance RS of the letter coil LT is multiplied with the detection output of the current detecting circuit DET1 showing the circuit current IC through the coefficient device K within the arithmetic circuit CAL that controls the voltage converting circuit CONV, and then subtracted from the voltage setting signal Se showing the power supply voltage E of the circuit current supply circuit LCF through the subtractor SB. Thus a calculation of VLC=E-RS.IL is carried out. Accordingly the Kre, Se and the like are set previously according to the conditions of the detection output to obtain the signal showing the voltage VLC to emerge as the interline voltage VL through the arithmetic circuit CAL. Then the circuit CONV is controlled by the output of the circuit CAL plus the comparison output given from the interline voltage detecting circuit DETv.
JP4215780A 1980-04-01 1980-04-01 Supply system of circuit current Granted JPS56140763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4215780A JPS56140763A (en) 1980-04-01 1980-04-01 Supply system of circuit current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4215780A JPS56140763A (en) 1980-04-01 1980-04-01 Supply system of circuit current

Publications (2)

Publication Number Publication Date
JPS56140763A true JPS56140763A (en) 1981-11-04
JPS637498B2 JPS637498B2 (en) 1988-02-17

Family

ID=12628105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4215780A Granted JPS56140763A (en) 1980-04-01 1980-04-01 Supply system of circuit current

Country Status (1)

Country Link
JP (1) JPS56140763A (en)

Also Published As

Publication number Publication date
JPS637498B2 (en) 1988-02-17

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