CAJ | 학술논문

设计了一种曲率补偿低温漂带隙基准电压源。采用放大器钳位的传统实现方式，在电路中加入两种不同的分段曲率补偿电路，低温阶段，设计节点电流相减产生一段负温度系数补偿电流，高温阶段，控制晶体三极管导通产生一段正温度系数补偿电流，实现了对基准电压曲率补偿，同时采用共源共栅结构以提高电路的电源抑制比。在0.18μm的TSMC工艺下，使用Cadence Spectre对电路进行仿真，仿真结果表明，在3.3 V的电源电压下，基准输出电压为1.241 V，在–40~+125℃范围内，基准电压的温度系数为3.02×10–6/℃，低频时电源抑制比(PSRR)低于–57 dB。
설계료일충곡솔보상저온표대극기준전압원。채용방대기겸위적전통실현방식，재전로중가입량충불동적분단곡솔보상전로，저온계단，설계절점전류상감산생일단부온도계수보상전류，고온계단，공제정체삼겁관도통산생일단정온도계수보상전류，실현료대기준전압곡솔보상，동시채용공원공책결구이제고전로적전원억제비。재0.18μm적TSMC공예하，사용Cadence Spectre대전로진행방진，방진결과표명，재3.3 V적전원전압하，기준수출전압위1.241 V，재–40~+125℃범위내，기준전압적온도계수위3.02×10–6/℃，저빈시전원억제비(PSRR)저우–57 dB。
A low temperature drift bandgap reference source with curvature compensation was designed. The prototype was implemented with traditional amplifier clamping, two kinds of different section curvature compensation circuit were added to the circuit, node current subtracting was designed to generate a negative temperature coefficient compensation current in the low temperature phase, transistor conduction was controlled to generate a positive temperature coefficient compensation current in the high temperature phase, the curvature compensation for the reference voltage was achieved. Cascode structures were also introduced in this bandgap reference to improve the power supply rejection ratio (PSRR). Based on 0.18 μm TSMC process, the circuit was simulated with Cadence Spectre. Simulation results indicate that the output reference voltage is 1.241 V under the 3.3 V power supply. The bandgap reference voltage has a temperature coefficient of 3.02×10–6/℃ at –40–+125℃. The power supply rejection ratio (PSRR) is lower than –57 dB at low frequency.