REFERENCE POWER SUPPLY CIRCUIT

PURPOSE:To obtain a same reference volage for plural power source voltages whose use is predetermined, by incorporating a switch circuit, which is turned on or off for the fluctuation of the power source voltage, in an IC and changing a resistance ratio to obtain the same set reference voltage. CONS...

Full description

Saved in:
Bibliographic Details
Main Authors KOBORI YASUNORI, OKAMOTO CHIKAYUKI, GOTOU KATSUHIKO
Format Patent
LanguageEnglish
Published 02.03.1984
Subjects
CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To obtain a same reference volage for plural power source voltages whose use is predetermined, by incorporating a switch circuit, which is turned on or off for the fluctuation of the power source voltage, in an IC and changing a resistance ratio to obtain the same set reference voltage. CONSTITUTION:When the voltage of a Zener diode 21 is lower than the power source voltage, a transistor TR23 is turned off. An output voltage determined by the power source voltage, the forward voltage (VBE) between the base and the emitter of a TR8, and resistances 6 and 7 is obtained in a terminal 5. When the voltage of a power source 4 is higher than the voltage of the Zener diode 21 by the forward voltage between the base and the emitter of the TR23, the TR23 is turned on, and a resistance 24 is grounded. An output voltage determined by the power source voltage, the voltage VBE of the TR8, and resistances 6, 7, and 24 is obtained in the terminal 5. The value of the resistance 24 is selected properly to obtain the same reference voltage for plural voltages of the power source 4.
Bibliography:Application Number: JP19820147780