Analysis of Wide Temperature Range and Low Temperature Coefficient Bandgap Reference

The bandgap reference (BGR) provides a stable output voltage to the circuit, which keeps almost the whole electrical system in normal working condition. It is extremely important to design a BGR that is less affected by external factors, especially temperature. This analysis delves into the performance of different compensation circuits like temperature drift coefficient and the operating temperature range. This report lists some optimizations for the classic structure and an innovative and proven feasible circuit with progressive features. The primary aim is to identify a BGR with a wider operating range under the condition of a relatively low temperature coefficient. Following the principle of finding an appropriate method to reduce the temperature coefficient and then expand the temperature range, this study compares the advantages and disadvantages of different compensation methods. It provides suggestions for future specific circuits that can be optimized and improved.