JPS5447462A - Dc signal isolator - Google Patents

Dc signal isolator

Info

Publication number
JPS5447462A
JPS5447462A JP11379777A JP11379777A JPS5447462A JP S5447462 A JPS5447462 A JP S5447462A JP 11379777 A JP11379777 A JP 11379777A JP 11379777 A JP11379777 A JP 11379777A JP S5447462 A JPS5447462 A JP S5447462A
Authority
JP
Japan
Prior art keywords
voltage
power supply
current
resistor
active power
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
JP11379777A
Other languages
Japanese (ja)
Other versions
JPS5950125B2 (en
Inventor
Akira Taniguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP52113797A priority Critical patent/JPS5950125B2/en
Publication of JPS5447462A publication Critical patent/JPS5447462A/en
Publication of JPS5950125B2 publication Critical patent/JPS5950125B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To realize such a structure in that the active power source is obtained from the DC current input signal itself, and thus to achieve a miniature size and economization with need of power supply from outside and to be effectively applied especially in the field of the industrial instruments (DC input of several mA). CONSTITUTION:DC current (about 4-20mA) input signal I1 is flown from signal transmitter 1 to signal detecting resistor 4 and the series circuit of Zener diode ZD5 via a pair of signal transmission lines 2 and 3. And the voltage proportional to I1 occurs at resistor 4, and nearly a constant active power supply voltage occurs at ZD5 regardless of the scale of I1 respectively. Then the overlap voltage of resistor is supplied to voltage-current conversion amplifier 6 which operates on a micro amount of power to be finally isolated from I1 via current transformer 9. At the same time, output voltage E0 proportional to I1 is produced. On the other hand, the overlap voltage of ZD5 obtains output voltage VB via free running multivibrator 20 and redoubled voltage rectifier circuit 25 to be supplied as the active power supply voltage.
JP52113797A 1977-09-21 1977-09-21 DC signal isolator Expired JPS5950125B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52113797A JPS5950125B2 (en) 1977-09-21 1977-09-21 DC signal isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52113797A JPS5950125B2 (en) 1977-09-21 1977-09-21 DC signal isolator

Publications (2)

Publication Number Publication Date
JPS5447462A true JPS5447462A (en) 1979-04-14
JPS5950125B2 JPS5950125B2 (en) 1984-12-06

Family

ID=14621314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52113797A Expired JPS5950125B2 (en) 1977-09-21 1977-09-21 DC signal isolator

Country Status (1)

Country Link
JP (1) JPS5950125B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204305A (en) * 1983-05-04 1984-11-19 Shinko Electric Co Ltd Insulation type current amplifier
JPH042110U (en) * 1990-04-18 1992-01-09

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204305A (en) * 1983-05-04 1984-11-19 Shinko Electric Co Ltd Insulation type current amplifier
JPH042110U (en) * 1990-04-18 1992-01-09

Also Published As

Publication number Publication date
JPS5950125B2 (en) 1984-12-06

Similar Documents

Publication Publication Date Title
SE7706475L (en) COMPENSATED SIGNAL INSULATOR
GB1528984A (en) Alternating current transformers
GB1226697A (en)
DE3785203D1 (en) MEASURING CIRCUIT.
JPS5447462A (en) Dc signal isolator
GB697578A (en) Improvements in or relating to time-integrating arrangements
JPS558656A (en) Sample hold circuit
GB878654A (en) Improvements in electric signal generating equipment
JPS5679946A (en) Optical densitometer
JPS53131457A (en) Constant voltage circuit
GB893405A (en) Improvements in electronic analogue computer circuits
JPS5410648A (en) Operation monitor circuit for amplifier
JPS5529722A (en) Current measuring unit
JPS5242355A (en) Pulse train receiving circuit
GB787691A (en) Improvements in or relating to amplifying and rectifying circuit-arrangements
JPS6418317A (en) Digital-analog converter circuit
JPS5289345A (en) Voltage-current converting transmitter using operation amplifier
JPS5791013A (en) Linearizer
JPS53115051A (en) Voltage control circuit
JPS5391783A (en) Alternating current wattmeter
JPS5610207A (en) Hysteresis level measuring circuit
JPS5375816A (en) Pulse circuit
JPS54159246A (en) Resistance value output circuit
JPS54147077A (en) Conversion method
JPS53144655A (en) Current-pulse generating circuit