JPS55123711A - Constant-voltage circuit - Google Patents

Constant-voltage circuit

Info

Publication number
JPS55123711A
JPS55123711A JP3002979A JP3002979A JPS55123711A JP S55123711 A JPS55123711 A JP S55123711A JP 3002979 A JP3002979 A JP 3002979A JP 3002979 A JP3002979 A JP 3002979A JP S55123711 A JPS55123711 A JP S55123711A
Authority
JP
Japan
Prior art keywords
temperature coefficient
temperature
coefficient
circuit
becomes
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
JP3002979A
Other languages
Japanese (ja)
Inventor
Masanori Ienaka
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 JP3002979A priority Critical patent/JPS55123711A/en
Publication of JPS55123711A publication Critical patent/JPS55123711A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain good reduced voltage and temperature characteristic and simplify a circuit, by utilizing difference of the temperature coefficient of a transistor or a diode dependent upon a current density to perform temperature compensation.
CONSTITUTION: A circuit is provided which applies the forward voltage of diode Q2 to the base of transistor Q1 grounded through emitter resistance R1 and flows the collector current of Q1WQ2 through the current Miller circuit, which is constituted by transistors Q3 and Q4, and resistance R2. Since the output of this circuit is taken out from the collector of Q4, dV0/dT obtained by differentiating this output V0 by temperature T becomes the sum of the temperature coefficient of Q2 and the difference between temperature coefficients of Q1 and Q2; and since the temperature coefficient of Q1 is larger as a negative coefficient, the temperature coefficient of the sum becomes a positive temperature coefficient, and the temperature coefficient of Q1 becomes a negative temperature coefficient. Consequently, the temperature coefficient of the output voltage can be zero by making resistance ratio R2/R1 equal to the temperature coefficient of the temperature coefficient of Q2/the temperature coefficient of the difference, thus performing temperature compensation.
COPYRIGHT: (C)1980,JPO&Japio
JP3002979A 1979-03-16 1979-03-16 Constant-voltage circuit Pending JPS55123711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3002979A JPS55123711A (en) 1979-03-16 1979-03-16 Constant-voltage circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3002979A JPS55123711A (en) 1979-03-16 1979-03-16 Constant-voltage circuit

Publications (1)

Publication Number Publication Date
JPS55123711A true JPS55123711A (en) 1980-09-24

Family

ID=12292386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3002979A Pending JPS55123711A (en) 1979-03-16 1979-03-16 Constant-voltage circuit

Country Status (1)

Country Link
JP (1) JPS55123711A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6062213A (en) * 1983-09-14 1985-04-10 Matsushita Electric Ind Co Ltd Reference voltage circuit
JPS63116221A (en) * 1986-11-05 1988-05-20 Nec Corp Constant voltage generating circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5253252A (en) * 1975-10-27 1977-04-28 Minolta Camera Co Ltd Constant current circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5253252A (en) * 1975-10-27 1977-04-28 Minolta Camera Co Ltd Constant current circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6062213A (en) * 1983-09-14 1985-04-10 Matsushita Electric Ind Co Ltd Reference voltage circuit
JPS63116221A (en) * 1986-11-05 1988-05-20 Nec Corp Constant voltage generating circuit

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