摘要
基于传统基准源的研究和分析,利用低压差调整器的原理和结构,通过插入失调电压对基准进行曲率补偿,得到一种新型曲率补偿CMOS带隙基准电压源。对基准源的低频电源噪声抑制和系统稳定性进行了推导和分析。测试结果表明,在20～100℃的温度范围内,基准电压在1.31235～1.31241 V,温度系数约为1 ppm/℃,低频下PSRR提高到90 dB;电路功耗为2.18 mW,版图面积为0.09 mm^2。
Based on the research and analysis of the traditional voltage reference, a new CMOS bandgap voltage reference with curvature compensation was designed by using the structure of low dropout regulator （LDO）, which effectively eliminated the influence of offset voltage. PSRR of the voltage reference at low frequency was analyzed and the stability of the system was discussed. Experimental results showed that the circuit had an output range from 1. 31235 V to 1. 31241 V, a temperature coefficient of 1 ppm/℃ in the temperature range from 20℃ to 100℃, and a low frequency PSRR of 90 dB. The circuit consumes 2. 18 mW of power and occupies a chip area of 0. 09 mm2.
出处
《微电子学》
CAS
CSCD
北大核心
2008年第6期882-885,共4页
Microelectronics
基金
浙江省重大科研项目基金资助(2006c14036)
