The voltage reference is an extremely important component of contemporary analog integrated circuits and mixed analog and digital circuits. It plays an important role in the application and development of high-tech analog electronic technology. In many integrated circuits, such as digital/analog converters, linear regulators, and switching regulators, a stable voltage reference is required. In precision measuring instruments and widely used digital communication systems, integrated voltage references are often used as references for system measurement and calibration. The reference voltage includes a reference voltage based on the forward VBE, a reference voltage based on the reverse breakdown characteristics of a Zener diode, and a bandgap reference voltage. Among them, the bandgap reference voltage has been widely used due to its advantages such as low temperature coefficient, high power supply rejection ratio, low voltage, low power, and long-term stability. The goal of this course design is to design a bandgap reference voltage source based on a 0.18um/1.8V CMOS process that meets specific performance indicators.
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