Method for generating a bandgap reference voltage circuit and the temperature curvature corrected reference voltage

摘要

(10), first and second transistors (not Q1 to Q4) is supplied to the PTAT current (12 to 15), and operational amplifier (A1), the first transistor stack first (8) the first current mirror circuit and while maintaining the same level as the resistor (R1) and the emitter voltage of the transistor (Q2), to draw PTAT current first current mirror circuit (10). It is scaled Vice resistance (R3), PTAT correction voltage which is generated through (R1) main resistance (dVbe) is summed with the uncorrected base-emitter voltage CTAT first transistor (Q1). And, is summed with the (13) PTAT current, (dVbe) is the TlnT temperature curvature of uncorrected base-emitter voltage CTAT first transistor (Q1) correction PTAT voltage which is generated mainly via a resistor (R1) is CTAT correction current to have a curvature TlnT complementary, and applied to the emitter of the second transistor (Q3).