(1.College of Physics and Microelectronics Science, Hunan Univ, Changsha, Hunan 410082,China; 2.China Electronics Technology Group Corporation No.58 Research Institute, Wuxi，Jiangsu 214035,China） 在知网中查找 在百度中查找 在本站中查找
The offset voltage of the OP directly influences the precision of the output voltage reference. To cancel the offset voltage, this paper adopts NPN to produce ΔVbe and designs a new feedback loop structure to produce a low voltage bandgap reference. The circuit is designed in SMIC 0.18 μm CMOS process. The temperature coefficient of this low voltage bandgap reference is 8 ppm/℃.The PSRR is -130 dB and the design output voltage is 0.5 V. The circuit has been successfully applied at a high speed, 16 bit ADC.
