A bandgap voltage reference for the D/A converter
Honghui Deng · Journal of Hefei University of Technology · 2008
This paper presents a bandgap voltage reference circuit used in the D/A converter,which has a very low temperature coefficient and an output lower than traditional bandgap reference's at a supply voltage of 3 V.The circuit improves the traditional bandgap reference circuit,minimizes amplifier maladjustment and circuit mismatch,and reduces the reference's output by resistance's voltage distribution.The circuit in a SMIC 0.35 μm CMOS process is simulated by Hspice tools.Simulation results show that the reference's temperature coefficient is only 3.6 ×10-6 /℃ at the temperature from-40 ℃ to 100 ℃,and that the power supply rejection ratio is 52 dB when the power supply changes from 2.7 V to 3.3 V.The bandgap voltage reference designed in this paper completely accords with the requirement of design and is a reference with good performance.