Title:
REFERENCE VOLTAGE GENERATING CIRCUIT
Document Type and Number:
Japanese Patent JP3163232
Kind Code:
B2
Abstract:
PURPOSE: To restrain fluctuation of an output voltage due to the change in the ambient temperature.
CONSTITUTION: The MOSFET 22c on the output side on one hand out of two current mirror circuits becomes the current source of the MOSFET 22a on the input side of the current mirror circuit on the other hand. Resistance R3 and R4 are connected in series to the MOSFETs 21b, 22b on the output side of both the current mirror circuits, and a constant voltage is applied to the connecting point of the resistances R3, R4. A constant current is passed from a constant current source to the MOSFET 22a on the input side of the current mirror circuit on one hand. Since the current is passed from a constant current source through the current mirror circuit, even if the ambient temperature changes, both end voltage of the resistances R3, R4 is high in stability with regard to the temperature change, and two voltages being stable to the temperature change can be obtained with the constant voltage applied to the connecting point of the resistances R3, R4 therebetween.
Inventors:
Atsushi Okita
Shinji Sakamoto
Satoshi Sugino
Shinji Sakamoto
Satoshi Sugino
Application Number:
JP8983595A
Publication Date:
May 08, 2001
Filing Date:
April 14, 1995
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
G01B11/00; G01C3/06; G01J1/02; G01R1/28; G01R19/165; G01V8/12; G05F3/26; H03F1/30; (IPC1-7): G01R1/28; G01R19/165; G05F3/26
Domestic Patent References:
| JP5527762A | ||||
| JP6120784A |
Attorney, Agent or Firm:
Keisei Nishikawa (1 person outside)