JPS57106914A - Current limiting circuit - Google Patents

Current limiting circuit

Info

Publication number
JPS57106914A
JPS57106914A JP18198680A JP18198680A JPS57106914A JP S57106914 A JPS57106914 A JP S57106914A JP 18198680 A JP18198680 A JP 18198680A JP 18198680 A JP18198680 A JP 18198680A JP S57106914 A JPS57106914 A JP S57106914A
Authority
JP
Japan
Prior art keywords
resistance
capacitor
base
resistances
lpf
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
JP18198680A
Other languages
Japanese (ja)
Inventor
Kunio Seki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18198680A priority Critical patent/JPS57106914A/en
Publication of JPS57106914A publication Critical patent/JPS57106914A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • G05F1/56—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/573—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To prevent oscillation by a small-capacity capacitor by providing resistances at bases of transistors (TR) so that their voltage drops are equal, and also providing a capacitor which forms an LPF together with one resistance. CONSTITUTION:A resistance R20 is provided in series to the base of a TRQ16, and between the base and collector of TRQ16, a capacitor C2 is provided, thus constituting an LPF for oscillation prevention. To the base of a TRQ15, a resistance R19 is connected so that voltage drops by base currents of both the TRs Q16 and Q15 are equal. Because of the insertion of those resistances R20 and R19, high-precision current detection and limiting operation are secured without exerting any infleunce upon current limiting characteristics. Therefore, the resistances R20 and R19 may have considerably large resistance values. Consequently, the capacitor C2 constituting the LPF together with the resistance R20 may have, for example, <=100pF small capacity value.
JP18198680A 1980-12-24 1980-12-24 Current limiting circuit Pending JPS57106914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18198680A JPS57106914A (en) 1980-12-24 1980-12-24 Current limiting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18198680A JPS57106914A (en) 1980-12-24 1980-12-24 Current limiting circuit

Publications (1)

Publication Number Publication Date
JPS57106914A true JPS57106914A (en) 1982-07-03

Family

ID=16110321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18198680A Pending JPS57106914A (en) 1980-12-24 1980-12-24 Current limiting circuit

Country Status (1)

Country Link
JP (1) JPS57106914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0946911A4 (en) * 1997-10-22 2001-03-14 Analog Devices Inc Inverter circuit biased to limit the maximum drive current to a following stage and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0946911A4 (en) * 1997-10-22 2001-03-14 Analog Devices Inc Inverter circuit biased to limit the maximum drive current to a following stage and method

Similar Documents

Publication Publication Date Title
HK51083A (en) Apparatus for handling a series of individual parts
JPS5291472A (en) Voltage detection circuit
JPS5326175A (en) Electronic watch
JPS57106914A (en) Current limiting circuit
JPS5330852A (en) Differential amplifier circuit
JPS5533221A (en) Current output circuit
JPS5320554A (en) Constant current circuit
JPS54125049A (en) Transistor circuit
JPS5567660A (en) Power maker circuit
JPS56132006A (en) Differential amplifier
JPS5466059A (en) Frequency divider circuit
JPS54137944A (en) Signal processing circuit
JPS5455343A (en) Level discrimination circuit
JPS6467012A (en) Pulse count system fm demodulation circuit
JPS5324869A (en) Current detecting circuit
JPS55121734A (en) Variable impedance circuit
JPS5359852A (en) Charging circuit for capacitor
JPS6412705A (en) Constant current circuit
JPS5619450A (en) Smoke sensor
JPS5696508A (en) Push-pull amplifying circuit
JPS55131822A (en) Constant-voltage circuit
JPS5226260A (en) Measuring circuit
JPS5314541A (en) Bias circuit
JPS5350644A (en) Active two terminal impedance circuit
JPS5441422A (en) Inverter