A Novel CMOS Bandgap Reference
Zhendao Wang · Electronics & Packaging · 2012
The normal band-gap low voltage reference circuit always adopt PNP to produce ΔVbe,however the offset voltage of the OPA directly influences the precision of the output voltage reference.The design of a 30×10-6/℃ CMOS bandgap voltage reference with low power supply voltage in temperature compensation and with the NPN to produce ΔVbe technology is described.The band-gap reference is implemented in SMIC 0.18μm CMOS process leading to an output voltage of about 1.24V.Simulation shows the average temperature coefficient is 30×10-6/℃ in the range from-40℃ to +120℃,PSRR is-88dB at 27℃ and voltage level bias characteristic is 31.2×10-6/ V.