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提出了一种新型带有负反馈的分段曲率校正带隙电压基准源,该基准源的主要特色是利用温度相关的电阻比技术获得一个分段曲率校正电流,校正了一阶带隙基准源的非线性温度特性.该分段线性电流产生电路还形成了一个负反馈,以改善带隙基准源的电源抑制和线性调整率.测试结果表明:在2.6V电源电压下,该基准源在没有采用校正的条件下,在-50～125℃温度范围内实现了最大21.2ppm/℃温度系数,电源抑制比为-60dB.在2.6～5.6V电源电压下的线性调整率为0.8mV/V.采用中芯国际(SMIC)0.35μm 5Vn阱数字CMOS工艺成功实现,有效芯片面积0.04mm2,其总功耗为0.18mW.该基准源应用于3,5V兼容的光纤接收跨阻放大器.
A new type of segmented curvature-corrected bandgap voltage reference with negative feedback is proposed. The main feature of this reference source is the use of temperature-dependent resistance ratio technique to obtain a segmented curvature correction current. The first-order bandgap reference Of the nonlinear temperature characteristics of the piecewise linear current generation circuit also formed a negative feedback to improve the bandgap reference power supply rejection and linearity adjustment test results show that: 2.6V supply voltage, the reference source in the absence of Under the condition of calibration, the maximum temperature coefficient of 21.2ppm / ° C is achieved in the temperature range of -50 ° C to 125 ° C, and the power supply rejection ratio is -60dB. The linear regulation rate is 0.8mV / V at 2.6 to 5.6V supply voltage. Achieved successfully with a SMIC 0.35μm 5Vn-well digital CMOS process with an effective chip area of 0.04mm2 and a total power dissipation of 0.18mW This reference source is used in a 3,5V-compatible fiber-receiving transimpedance amplifier.