Design of Low Temperature-Drift Bandgap Voltage Reference with High PSRR
Zhou Guihua · 2012
Based on the principle of bandgap reference and current reference source with 3-branch negative feedback,a bandgap voltage reference source with 2nd-order and 3rd-order temperature compensation was designed.The circuit had a high PSRR and low temperature-drift.The design was based on 0.35 μm CMOS process.Simulation results showed that the bandgap reference source had a temperature coefficient below 7.70 × 10-7 /℃ when the temperature varied from-40 ℃ to 125 ℃,and a PSRR of-82.3 dB at 1 kHz.