JPS5773427A - Current control circuit - Google Patents

Current control circuit

Info

Publication number
JPS5773427A
JPS5773427A JP16573380A JP16573380A JPS5773427A JP S5773427 A JPS5773427 A JP S5773427A JP 16573380 A JP16573380 A JP 16573380A JP 16573380 A JP16573380 A JP 16573380A JP S5773427 A JPS5773427 A JP S5773427A
Authority
JP
Japan
Prior art keywords
current
output
pnp
inverted
input terminal
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
JP16573380A
Other languages
Japanese (ja)
Inventor
Nobuo Fujiwara
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP16573380A priority Critical patent/JPS5773427A/en
Publication of JPS5773427A publication Critical patent/JPS5773427A/en
Priority to US06/667,394 priority patent/US4629998A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/26—Current mirrors
    • G05F3/265—Current mirrors using bipolar transistors only

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To greatly reduce the number of component parts to realize a low cost and at the same time to reduce the noise caused by the current, by obtaining the output current with the reverse phase by using the junction point between a constant current circuit and the emitter or the source of a transistor (TR) for the input terminal of the control current. CONSTITUTION:A connection point A where a cascade connection is secured between a PNP tranistor TR13 for constant current circuit and PNP TR14 and TR15 which are connected in an inverted Darlington way is used as an input terminal 1 of the control current i4. Then the collector or the drain of the TR13 is varied in the direction opposite to the change of the current i4 in accorddance with the current i4. Thus an output current i5 that has the same value with the current i4 and the phase inverted to the current i4 can be obtained since an output terminal 2 is obtained with the phase inverted to the current i4.
JP16573380A 1980-10-23 1980-11-25 Current control circuit Pending JPS5773427A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP16573380A JPS5773427A (en) 1980-11-25 1980-11-25 Current control circuit
US06/667,394 US4629998A (en) 1980-10-23 1984-11-02 Variable gain equalizer with a mirror circuit having opposite phase relationship between input and output currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16573380A JPS5773427A (en) 1980-11-25 1980-11-25 Current control circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP14855780A Division JPS5772408A (en) 1980-10-23 1980-10-23 Variable gain equalizer circuit

Publications (1)

Publication Number Publication Date
JPS5773427A true JPS5773427A (en) 1982-05-08

Family

ID=15818035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16573380A Pending JPS5773427A (en) 1980-10-23 1980-11-25 Current control circuit

Country Status (1)

Country Link
JP (1) JPS5773427A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279250A (en) * 1975-12-25 1977-07-04 Nec Corp Composite constant-current circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279250A (en) * 1975-12-25 1977-07-04 Nec Corp Composite constant-current circuit

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