SiGe BiCMOS Precision Voltage References for Extreme Temperature Range Electronics
Laleh Najafizadeh, Chendong Zhu, Ram Krithivasan, John D. Cressler, Yan Cui, Guofu Niu, Suheng Chen, Chandradevi Ulaganathan, Benjamin J. Blalock, Alvin J Joseph · 2006
We present the first investigation of the optimal implementation of SiGe BiCMOS precision voltage references for extreme temperature range applications (+120 degC to -180 degC and below). We have developed and fabricated two unique Ge profiles optimized specifically for cryogenic operation, and for the first time compare the impact of Ge profile shape on precision voltage reference performance down to -180 degC. Our best case reference achieves a 28.1 ppm/ degC temperature coefficient over +27 degC to -180 degC, more than adequate for the intended lunar electronics applications