JPS5534794A - Constant voltage circuit - Google Patents

Constant voltage circuit

Info

Publication number
JPS5534794A
JPS5534794A JP10941678A JP10941678A JPS5534794A JP S5534794 A JPS5534794 A JP S5534794A JP 10941678 A JP10941678 A JP 10941678A JP 10941678 A JP10941678 A JP 10941678A JP S5534794 A JPS5534794 A JP S5534794A
Authority
JP
Japan
Prior art keywords
current
transistor
power supply
transistors
mirror circuit
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
JP10941678A
Other languages
Japanese (ja)
Inventor
Masaharu Sato
Takeshi Kimura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10941678A priority Critical patent/JPS5534794A/en
Publication of JPS5534794A publication Critical patent/JPS5534794A/en
Pending legal-status Critical Current

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Landscapes

  • Control Of Electrical Variables (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE: To get rid of the influence due to power supply variation by detecting the current change of the current mirror circuit which is caused by power supply variation, and providing negative feedback to the current setting transistors of the current mirror circuit.
CONSTITUTION: Voltage of a portion for two diodes is set up in the terminal 10 by transistors 13 and 6, and it is output from the terminal 11 through the emitter- follower. When the power supply voltage Vcc rises, the collector current Ic2 of the transistor 2 is increased by an early effect. And the base potential of the transistor 4 is lowered due to a voltage drop of the resistor 12, and the collector current Ic3 of the transistor 3 is decreased. Accordingly, the current Ic2 is also decreased, and the early effect is negated. As mentioned above, since negative feedback has been provided to the current mirror circuit (transistors 2 and 3), the constant voltage output characteristics are elevated.
COPYRIGHT: (C)1980,JPO&Japio
JP10941678A 1978-09-05 1978-09-05 Constant voltage circuit Pending JPS5534794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10941678A JPS5534794A (en) 1978-09-05 1978-09-05 Constant voltage circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10941678A JPS5534794A (en) 1978-09-05 1978-09-05 Constant voltage circuit

Publications (1)

Publication Number Publication Date
JPS5534794A true JPS5534794A (en) 1980-03-11

Family

ID=14509687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10941678A Pending JPS5534794A (en) 1978-09-05 1978-09-05 Constant voltage circuit

Country Status (1)

Country Link
JP (1) JPS5534794A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58144920A (en) * 1982-02-23 1983-08-29 Toshiba Corp Constant current circuit
JPS6062124U (en) * 1983-10-04 1985-05-01 三洋電機株式会社 constant voltage circuit
JPS6111825A (en) * 1984-06-26 1986-01-20 Yokogawa Hokushin Electric Corp Reference voltage generating circuit
US4578633A (en) * 1983-08-31 1986-03-25 Kabushiki Kaisha Toshiba Constant current source circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854460A (en) * 1971-11-11 1973-07-31
JPS50343A (en) * 1973-05-07 1975-01-06

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854460A (en) * 1971-11-11 1973-07-31
JPS50343A (en) * 1973-05-07 1975-01-06

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58144920A (en) * 1982-02-23 1983-08-29 Toshiba Corp Constant current circuit
US4578633A (en) * 1983-08-31 1986-03-25 Kabushiki Kaisha Toshiba Constant current source circuit
JPS6062124U (en) * 1983-10-04 1985-05-01 三洋電機株式会社 constant voltage circuit
JPS6111825A (en) * 1984-06-26 1986-01-20 Yokogawa Hokushin Electric Corp Reference voltage generating circuit

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