JPS57146325A - Constant current circuit - Google Patents

Constant current circuit

Info

Publication number
JPS57146325A
JPS57146325A JP3104781A JP3104781A JPS57146325A JP S57146325 A JPS57146325 A JP S57146325A JP 3104781 A JP3104781 A JP 3104781A JP 3104781 A JP3104781 A JP 3104781A JP S57146325 A JPS57146325 A JP S57146325A
Authority
JP
Japan
Prior art keywords
voltage
load current
load
resistors
operational amplifier
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
JP3104781A
Other languages
Japanese (ja)
Other versions
JPH0534690B2 (en
Inventor
Hideo Sugiyama
Hideharu Tezuka
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 JP3104781A priority Critical patent/JPS57146325A/en
Publication of JPS57146325A publication Critical patent/JPS57146325A/en
Publication of JPH0534690B2 publication Critical patent/JPH0534690B2/ja
Granted 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
    • G05F1/567—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 temperature compensation

Landscapes

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

Abstract

PURPOSE:To obtain a stable load current against temperature change, by compensating a reference voltage against the fluctuation of a load resistance value due to temperature change. CONSTITUTION:Resistors 11 and 12 are connected between a power supply voltage Vcc and ground GND. A voltage V1 is generated at the base connection point of a transistor (TR) 13 by setting the resistors 11 and 12. According to this voltage V1, a reference voltage V2 is generated at a + side input of an operational amplifier 15. An output voltage of the operational amplifier 15 goes to high level when a voltage VL applied to a - side input is smaller than V2 (V2>VL). Thus, a load current flowing to a load resistor RL via a TR is increased. Then the state of V2>VL is obtained and the load current is controlled to be decreased. Thus, the load current is made stable independently of temperature changes.
JP3104781A 1981-03-04 1981-03-04 Constant current circuit Granted JPS57146325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3104781A JPS57146325A (en) 1981-03-04 1981-03-04 Constant current circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3104781A JPS57146325A (en) 1981-03-04 1981-03-04 Constant current circuit

Publications (2)

Publication Number Publication Date
JPS57146325A true JPS57146325A (en) 1982-09-09
JPH0534690B2 JPH0534690B2 (en) 1993-05-24

Family

ID=12320561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3104781A Granted JPS57146325A (en) 1981-03-04 1981-03-04 Constant current circuit

Country Status (1)

Country Link
JP (1) JPS57146325A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61125621A (en) * 1984-11-21 1986-06-13 Nec Corp Reference voltage generating circuit
CN102508510A (en) * 2011-12-26 2012-06-20 朱月林 Single-chip ultra-high-voltage constant-current circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5656376B2 (en) * 2009-08-17 2015-01-21 キヤノン株式会社 Electromagnetic induction heating system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5154252A (en) * 1974-11-07 1976-05-13 Tokyo Shibaura Electric Co
JPS54143173A (en) * 1978-04-28 1979-11-08 Sony Tektronix Corp Circuit with two electrical current sources

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5154252A (en) * 1974-11-07 1976-05-13 Tokyo Shibaura Electric Co
JPS54143173A (en) * 1978-04-28 1979-11-08 Sony Tektronix Corp Circuit with two electrical current sources

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61125621A (en) * 1984-11-21 1986-06-13 Nec Corp Reference voltage generating circuit
CN102508510A (en) * 2011-12-26 2012-06-20 朱月林 Single-chip ultra-high-voltage constant-current circuit

Also Published As

Publication number Publication date
JPH0534690B2 (en) 1993-05-24

Similar Documents

Publication Publication Date Title
JPS57206113A (en) Amplifier for limiter
KR950025502A (en) Constant voltage circuit
JPS57146325A (en) Constant current circuit
US4329598A (en) Bias generator
JPS5597619A (en) Reference signal generating circuit
JPS54156153A (en) Temperature compensating constant voltage circuit
JPS551147A (en) Stabilized luminous source
JPS5677710A (en) Zero-point adjusting circuit
JPS55115383A (en) Bias circuit for laser diode
SU826303A1 (en) Dc voltage stabilizer
JPS57132214A (en) Constant voltage circuit
JPS5717207A (en) Amplifying circuit
JPS5696307A (en) Constant-current circuit
JPS56168243A (en) Constant-voltage circuit
SU826304A1 (en) Reference voltage source
SU800973A1 (en) Dc voltage stabilizer
KR970031292A (en) A comparator with temperature-compensated hysteresis
SU866550A1 (en) Parallel-type dc voltage stabilizer
SU1737428A1 (en) Voltage regulator
JPS6457322A (en) Voltage regulating circuit in integrated circuit
JPS57203114A (en) Power supply circuit
JPS57204926A (en) Voltage controlling circuit
JPS5791032A (en) Logical circuit device
JPS57143908A (en) Variable gain amplifying circuit
JPS54126944A (en) Constant-current circuit