To meet the accuracy requirement for the bandgap voltage reference by the increasing data conversion precision of integrated circuits,a high-order curvature-compensated bandgap voltage reference is presented employing...To meet the accuracy requirement for the bandgap voltage reference by the increasing data conversion precision of integrated circuits,a high-order curvature-compensated bandgap voltage reference is presented employing the characteristic of bipolar transistor current gain exponentially changing with temperature variations.In addition,an over-temperature protection circuit with a thermal hysteresis function to prevent thermal oscillation is proposed.Based on the CSMC 0.5μm 20 V BCD process,the designed circuit is implemented;the active die area is 0.17×0.20 mm;. Simulation and testing results show that the temperature coefficient is 13.7 ppm/K with temperature ranging from -40 to 150℃,the power supply rejection ratio is -98.2 dB,the line regulation is 0.3 mV/V,and the power consumption is only 0.38 mW.The proposed bandgap voltage reference has good characteristics such as small area,low power consumption, good temperature stability,high power supply rejection ratio,as well as low line regulation.This circuit can effectively prevent thermal oscillation and is suitable for on-chip voltage reference in high precision analog,digital and mixed systems.展开更多
比较了传统带运算放大器的带隙基准电压源电路与采用曲率补偿技术的改进电路,设计了一种适合汽车电子使用的带隙基准电压源,该设计电路基于上海贝岭2μm 40 V bipolar工艺,采用一阶曲率补偿技术,充分考虑了汽车空间有限、温差大、噪声...比较了传统带运算放大器的带隙基准电压源电路与采用曲率补偿技术的改进电路,设计了一种适合汽车电子使用的带隙基准电压源,该设计电路基于上海贝岭2μm 40 V bipolar工艺,采用一阶曲率补偿技术,充分考虑了汽车空间有限、温差大、噪声多的环境特点,没有使用运放,避免其复杂的结构以及所引起的失调,因此降低了电路成本并改善性能,设计中还引入了启动电路,大大降低了附加功耗。用Cadence Spectre对电路仿真,结果表明,电路温度特性好,抗干扰能力强,有较高的电源抑制比(PSRR),达到预期指标。展开更多
基金supported by the National Natural Science Foundation of China(Nos.60725415,60971066)the National High-Tech Research and Development Program of China(Nos.2009AA01Z258,2009AA01Z260)the National Science & Technology Important Project of China(No.2009ZX01034-002-001-005)
文摘To meet the accuracy requirement for the bandgap voltage reference by the increasing data conversion precision of integrated circuits,a high-order curvature-compensated bandgap voltage reference is presented employing the characteristic of bipolar transistor current gain exponentially changing with temperature variations.In addition,an over-temperature protection circuit with a thermal hysteresis function to prevent thermal oscillation is proposed.Based on the CSMC 0.5μm 20 V BCD process,the designed circuit is implemented;the active die area is 0.17×0.20 mm;. Simulation and testing results show that the temperature coefficient is 13.7 ppm/K with temperature ranging from -40 to 150℃,the power supply rejection ratio is -98.2 dB,the line regulation is 0.3 mV/V,and the power consumption is only 0.38 mW.The proposed bandgap voltage reference has good characteristics such as small area,low power consumption, good temperature stability,high power supply rejection ratio,as well as low line regulation.This circuit can effectively prevent thermal oscillation and is suitable for on-chip voltage reference in high precision analog,digital and mixed systems.
文摘比较了传统带运算放大器的带隙基准电压源电路与采用曲率补偿技术的改进电路,设计了一种适合汽车电子使用的带隙基准电压源,该设计电路基于上海贝岭2μm 40 V bipolar工艺,采用一阶曲率补偿技术,充分考虑了汽车空间有限、温差大、噪声多的环境特点,没有使用运放,避免其复杂的结构以及所引起的失调,因此降低了电路成本并改善性能,设计中还引入了启动电路,大大降低了附加功耗。用Cadence Spectre对电路仿真,结果表明,电路温度特性好,抗干扰能力强,有较高的电源抑制比(PSRR),达到预期指标。
