[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS5554445A - Broad-dynamic-range current detector - Google Patents

Broad-dynamic-range current detector

Info

Publication number
JPS5554445A
JPS5554445A JP8172578A JP8172578A JPS5554445A JP S5554445 A JPS5554445 A JP S5554445A JP 8172578 A JP8172578 A JP 8172578A JP 8172578 A JP8172578 A JP 8172578A JP S5554445 A JPS5554445 A JP S5554445A
Authority
JP
Japan
Prior art keywords
current
rbi
rai
flows
output
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
JP8172578A
Other languages
Japanese (ja)
Other versions
JPS5845661B2 (en
Inventor
Tsuguyoshi Hayashi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP53081725A priority Critical patent/JPS5845661B2/en
Publication of JPS5554445A publication Critical patent/JPS5554445A/en
Publication of JPS5845661B2 publication Critical patent/JPS5845661B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE: To expand a range and also to increase a response speed by connecting a Zener diode and current detector, which generates a voltage in proportion to a current through it, to the other terminal of a current detection resistor.
CONSTITUTION: Current I through measured body 2 flows through current detection resistor 1a (resistance value Ra) as current I1 and current detection resistor 1b (resistance value Rb) as current I2 through Zener diode ZD13, but when current I is small and V=RaI is much smaller than Zener voltage Vz, a current seldom flows through ZD13 and output V=RaI can be obtained from insulating amplifier 5. When current I increases and V=RaI1 reaches voltage Vz, increment of current I flows through resistance 1b by way of ZD13 and V'=-RbI2 is developed at the output of low-input current operational amplifier 7. Because of current I=I1+I2, adder 14 adds together outputs of amplifiers 5 and 7 and resistance values of resistors 16W19 are selected bearing a relation of Rb/Ra=C, so that an output of V'''=CRaI1+RbI2=RbI can be obtained from operational amplifier 15.
COPYRIGHT: (C)1980,JPO&Japio
JP53081725A 1978-07-04 1978-07-04 Wide dynamic range current detector Expired JPS5845661B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53081725A JPS5845661B2 (en) 1978-07-04 1978-07-04 Wide dynamic range current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53081725A JPS5845661B2 (en) 1978-07-04 1978-07-04 Wide dynamic range current detector

Publications (2)

Publication Number Publication Date
JPS5554445A true JPS5554445A (en) 1980-04-21
JPS5845661B2 JPS5845661B2 (en) 1983-10-12

Family

ID=13754380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53081725A Expired JPS5845661B2 (en) 1978-07-04 1978-07-04 Wide dynamic range current detector

Country Status (1)

Country Link
JP (1) JPS5845661B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006283425A (en) * 2005-04-01 2006-10-19 Daiwa House Ind Co Ltd Structure of pile with rotary press-in type blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006283425A (en) * 2005-04-01 2006-10-19 Daiwa House Ind Co Ltd Structure of pile with rotary press-in type blade

Also Published As

Publication number Publication date
JPS5845661B2 (en) 1983-10-12

Similar Documents

Publication Publication Date Title
JPS5543447A (en) Hot-wire type flow rate measuring device
JPS5642132A (en) Detecting device for air-fuel ratio
JPS57124909A (en) Output transistor protection circuit
JPS5554445A (en) Broad-dynamic-range current detector
JPS55102076A (en) Logarithmic converter
JPS56144610A (en) Converting circuit
JPS5374261A (en) Constant voltage equipment
JPS57200814A (en) Detection amplifier
JPS54103658A (en) Protective circuit
JPS564814A (en) Voltage dividing circuit
JPS5320554A (en) Constant current circuit
JPS5524686A (en) Dc resistance measuring method
JPS5327353A (en) Bipolar digital-analog converter
JPS5616311A (en) Transistor circuit
JPS5357941A (en) Multiplier using hall element
JPS5379468A (en) Measurement method for element characteristics
JPS5436556A (en) Constant current circuit
JPS55159213A (en) Output control method
JPS5361299A (en) Photoelectric smoke detector
JPS56110312A (en) Diferential amplifier
JPS5791012A (en) Level detection circuit
JPS5537886A (en) Gate pulse generator
JPS5649949A (en) Electric hygrometer
JPS557671A (en) Insulation resistance meter
JPS568559A (en) Current detecting circuit