【摘要】 提出了一种基于阈值电压Vth与热电压VT相互补偿的新型非带隙CMOS电压基准源。采用一种新型电路结构提取正比于Vth的电流,通过自偏置电流镜结构获得正比于两个三极管VBE之差的电流输出,两者在公共电阻上的线性叠加,实现Vth与VT的相互补偿。基于3·3V电源电压0·35μm标准CMOS工艺模型在CadanceSpectre仿真环境下对电路进行模拟验证,获得以下结果:输出基准电压为716·828mV,在-55℃~+125℃范围内,其温度系数为3·53×10-6m/℃;VDD在2·7V~4V之间变化时,输出电压变化率为1·346%。更多还原

【Abstract】 A new non-bandgap CMOS voltage reference circuit with compensation of thermal voltage V_T and threshold voltage V_ th is proposed in this paper. The compensation is implemented by superposing two currents on a common resistance. One current proportional with Vth is obtained by a novel circuit structure, and the other is the output of a self-biased current mirror which is proportional with the difference between the V_ BE of two triodes. Cadance Spectre simulation based on 0.35μm process reports that temperature coefficient is 3.53×10~ -6 m/℃ with temperature range from -55℃ to 125℃ and voltage sensitivity is 1.346%(V_ DD from to 2.7V to 4 V).更多还原