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پنجمین کنفرانس بین المللی میکروالکترونیک ایران
A Low-Power Bandgap Voltage Reference Circuit With Ultra-Low Temperature Coefficient
نویسندگان :
Elaheh Pakravan (دانشگاه ارومیه) , Mortaza Mojarad (دانشگاه ارومیه) , Behboud Mashoufi (دانشگاه ارومیه)
کلمات کلیدی :
bandgap reference،CTAT voltage،PTAT voltage،temperature coefficient،curvature compensation
چکیده :
A highly accurate bandgap reference with ultra-low sensitivity to temperature variations has been proposed. In the presented work, new techniques and circuits have been proposed to provide voltages with negative and positive temperature coefficients. Moreover, a novel fully MOS CTAT voltage generator without using BJT transistors has been proposed. This voltage and PTAT voltages with different sensitivities to temperature are finally summed up leading to the generation of a reference with a very low temperature dependency. The proposed bandgap reference has been simulated in a 0.18μm CMOS process using ADS. The temperature coefficient is almost 5 ppm/°C, over -40°C to 100°C temperature variation, consuming almost 2μA quiescent current
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