Super Performance BiCMOS Band-Gap Voltage Reference
Shi Guang
Abstract
Shi Guang
Abstract
In this paper,a novel high precision CMOS bandgap voltage reference which uses a negative back circuit and a RC filter to enhance the PSRR is proposed.Using 1.2 μm BiCMOS process of Beiling,Shanghai,this bandgap voltage reference was designed and simulated.Cadence Spectre simulation results show that this circuit has higher precision and stability,and the output of the bandgap voltage is 1. 254 V.The greatest skew of reference voltage to input voltage is 0.012 mV in the power supply range from 2.7 V to 5.5 V,and the maximum static current of reference is 11.27 μA;the greatest skew of reference voltage to temperature is about 1 mV in the range of-40 ℃~120 ℃;the total current of the bandgap reference is about 10.6 μA with the power dissipation about 38.16 μW at 3.6 V power supply.This bandgap reference also has higher than 100 dB PSRR at low frequency,and the start up time of output is about 39 μs.
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In this paper,a novel high precision CMOS bandgap voltage reference which uses a negative back circuit and a RC filter to enhance the PSRR is proposed.Using 1.2 μm BiCMOS process of Beiling,Shanghai,this bandgap voltage reference was designed and simulated.Cadence Spectre simulation results show that this circuit has higher precision and stability,and the output of the bandgap voltage is 1. 254 V.The greatest skew of reference voltage to input voltage is 0.012 mV in the power supply range from 2.7 V to 5.5 V,and the maximum static current of reference is 11.27 μA;the greatest skew of reference voltage to temperature is about 1 mV in the range of-40 ℃~120 ℃;the total current of the bandgap reference is about 10.6 μA with the power dissipation about 38.16 μW at 3.6 V power supply.This bandgap reference also has higher than 100 dB PSRR at low frequency,and the start up time of output is about 39 μs.
Key concepts: Bandgap voltage reference, Power supply rejection ratio, Voltage reference, Voltage, Line regulation, Silicon bandgap temperature sensor, Electrical engineering, Skew