Design of CMOS bandgap voltage reference circuit with high PSR
HE Zhi-we · Modern Electronics Technique · 2014
The power supply voltage needs to be constantly decreased to meet the requirement of reducing the low-power consumption of IC,but it may lead to the negative impact of power supply noise on the reference voltage.A low-power consumption bandgap voltage reference with high PSR(power supply rejection)and low-temperature coefficent was design based on in SMIC0.18μm process.The simulation results show that the PSR of the bandgap reference source is-65.13 dB at 50 kHz and-53.85 dB at 100 kHz respectively;at 2~6 V supply voltage,the supply current is 30 μA,the temperature coefficient is 30.38ppm/℃,and the voltage regulation rate is 71.47 μV/V.The bandgap voltage reference is suitable for LDOs circuit which has the requirements of low-power consumption and high PSR.