JPS57147722A - Cmos constant voltage circuit - Google Patents

Cmos constant voltage circuit

Info

Publication number
JPS57147722A
JPS57147722A JP3224981A JP3224981A JPS57147722A JP S57147722 A JPS57147722 A JP S57147722A JP 3224981 A JP3224981 A JP 3224981A JP 3224981 A JP3224981 A JP 3224981A JP S57147722 A JPS57147722 A JP S57147722A
Authority
JP
Japan
Prior art keywords
reference voltage
voltage
circuit
difference
voltages
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
JP3224981A
Other languages
Japanese (ja)
Other versions
JPH0310968B2 (en
Inventor
Yasuhiko Nishikubo
Yoshirou Kijitani
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP3224981A priority Critical patent/JPS57147722A/en
Publication of JPS57147722A publication Critical patent/JPS57147722A/en
Publication of JPH0310968B2 publication Critical patent/JPH0310968B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (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 obtain superior temperature characteristics by obtaining reference voltage by a single current mirror type reference voltage circuit, and using a difference between those reference voltages as the output voltage of a constant voltage circuit. CONSTITUTION:In a single current mirror type reference voltage circuit 3a, a reference voltage VR'G3 is developed at the drain output of an NMOS transistor (TR) 106, and a reference voltage VR'G4 is developed at the drain output of a PMOSTR301. A potential difference VR'G5 between those reference voltages VR'G3 and VR'G4 is nearly proportional to the sum of the threshold voltages of an NMOSTR105 and a PMOSTR302. Variation in threshold voltage depends mainly upon variation in temperature, and both the reference voltages are extracted from a single reference voltage, so their temperature coefficients are nearly equal. Therefore, the difference in reference voltage has excellent temperature characteristics. It is passed through a difference amplifying circuit 3b and a voltage follower circuit 3c to obtain a necessary value, developing a new reference voltage.
JP3224981A 1981-03-06 1981-03-06 Cmos constant voltage circuit Granted JPS57147722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3224981A JPS57147722A (en) 1981-03-06 1981-03-06 Cmos constant voltage circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3224981A JPS57147722A (en) 1981-03-06 1981-03-06 Cmos constant voltage circuit

Publications (2)

Publication Number Publication Date
JPS57147722A true JPS57147722A (en) 1982-09-11
JPH0310968B2 JPH0310968B2 (en) 1991-02-14

Family

ID=12353730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3224981A Granted JPS57147722A (en) 1981-03-06 1981-03-06 Cmos constant voltage circuit

Country Status (1)

Country Link
JP (1) JPS57147722A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465343A (en) * 1977-11-01 1979-05-25 Nissin Electric Co Ltd Method of assembling gas insulation electrical machinery and apparatus at field

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465343A (en) * 1977-11-01 1979-05-25 Nissin Electric Co Ltd Method of assembling gas insulation electrical machinery and apparatus at field

Also Published As

Publication number Publication date
JPH0310968B2 (en) 1991-02-14

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