Title:
ZENER DIODE CIRCUIT FOR GENERATING CONSTANT VOLTAGE
Document Type and Number:
Japanese Patent JP2001290544
Kind Code:
A
Abstract:
To provide a Zener diode circuit whose Zener voltage does not vary in spite of the temperature variation of Zener diodes.
A diode array 6 is constituted by connecting a Zener diode 3 which has a negative Zener voltage temperature coefficient γ2 and a Zener diode 5 which has a positive Zener voltage temperature coefficient 3g3 in series. The Zener diodes 3 and 5 are so selected that the sum of the Zener voltages V2 and V3 of the Zener diodes 3 and 5 is equal to a desired output voltage Vout and the sum of the Zener voltage temperature coefficients γ2 and γ3 of the Zener diodes 3 and 5 is zero.
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Inventors:
OTSUKA TADASHI
Application Number:
JP2000106232A
Publication Date:
October 19, 2001
Filing Date:
April 07, 2000
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G05F3/18; (IPC1-7): G05F3/18
Attorney, Agent or Firm:
Teruyuki Uemura (1 person outside)