A low-temperature drift high-precision segmented temperature compensated bandgap reference source circuit
Based on the TSMC 0.18 μm CMOS process,this design proposes a low temperature drift,high-precision segmented temperature compensation bandgap reference circuit.The circuit consists of a startup circuit,bandgap reference core circuit,and low temperature drift temperature compensation circuit.By adopting a segmented temperature compensation approach,the low-temperature and high-temperature segments of the first-order bandgap reference voltage temperature curve are individually compensated,significantly reducing the temperature coefficient of the reference voltage.This results in a bandgap reference voltage output with low temperature coefficient and high precision.Simulation results show that,when the temperature varies from-40℃to 125℃,the temperature coefficient of the bandgap reference voltage is significantly reduced from 15.47×10-6 to 1.141×10-6 after applying the segmented temperature compensation,effectively improving temperature stability and voltage accuracy.
bandgap reference sourcesegmented temperature compensationlow-temperature coefficienthigh-precision
万方数据
维普
