REFERENCE VOLTAGE GENERATION CIRCUIT

摘要

PURPOSE: A reference voltage generation circuit is provided to generate stably a reference voltage by minimizing a variation of the reference voltage according to a variation of temperature. CONSTITUTION: A voltage bias portion(201) sets up a preliminary reference voltage(VREF_P) by the first to the fifth resistances(R1 to R5) and the first transistor group(M1 to M24). A voltage control portion(203) determined a voltage level of the preliminary reference voltage(VREF_P) by transistors(M31,M32) of the second transistor group connected between the preliminary reference voltage(VREF_P) and a ground power source(VSS). A voltage compensation portion(207) is formed by transistors(M41 to M46) of the second transistor group connected between the preliminary reference voltage(VREF_P) and a reference voltage(VREF). A voltage compensation portion(209) is formed by transistors(M51 to M58) of the third transistor group in order to control a range of the reference voltage(VREF). A capacitor(205) is used for supplying the reference voltage(VREF).