Low voltage high PSRR band-gap voltage reference
Xu Jing-Ping
Abstract
Xu Jing-Ping
Abstract
A low power and high precision CMOS band-gap voltage reference circuit is presented with high power supply rejection ratio(PSRR).The proposed circuit uses a regulated current mode structure and feedback loop to reach a low voltage,low power and high PSRR voltage reference.Based on 0.25μm CMOS process,the measured results show that the PSRR is about 80dB at the frequency of 1KHz under the power supply of 1V,and the output voltage variation versus temperature ranging from 0℃ to 70℃ is less than 0.3%.
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A low power and high precision CMOS band-gap voltage reference circuit is presented with high power supply rejection ratio(PSRR).The proposed circuit uses a regulated current mode structure and feedback loop to reach a low voltage,low power and high PSRR voltage reference.Based on 0.25μm CMOS process,the measured results show that the PSRR is about 80dB at the frequency of 1KHz under the power supply of 1V,and the output voltage variation versus temperature ranging from 0℃ to 70℃ is less than 0.3%.
Key concepts: Power supply rejection ratio, Bandgap voltage reference, Voltage reference, Electrical engineering, Voltage, CMOS, Materials science, Dropout voltage