Based on the linearized vbe temperature drift band gap reference voltage source

The present invention discloses a linearization based VBE temperature drift bandgap reference voltage source, the circuit comprising a PTAT current generating circuit, the high-order compensated bandgap reference circuit, starting circuit and a starting circuit II. The difference between the collector current reference circuit by the temperature characteristics of two different constructs of the nonlinear term VBE, VBE and then superimposed, wherein the nonlinear term is canceled, to the effect of high-order compensation. Zero temperature characteristic of collector current which is composed of two superimposed VBE minus a VBE voltage is applied to the negative temperature coefficient current is generated across the resistor R3 and ΔVBE positive temperature coefficient current is generated across the resistor R1 from the addition, the temperature characteristic do not affect the output voltage accuracy, to ensure the accuracy of higher-order compensation. Compared with the traditional method of linearizing VBE This circuit uses the VREF voltage mode output, to avoid the influence of the output current mirror mismatch and resistance temperature characteristic compensation precision, the reference voltage to obtain a high-precision zero temperature coefficient, and thus a low conversion accuracy solution And other issues.