Title :
Ultra-low Power CMOS Cells for Temperature Sensors
Author :
Rossi, Conrado ; Aguirre, Pablo
Author_Institution :
Inst. de Ingenieria Electrica, Univ. de la Republica, Montevideo
Abstract :
Temperature sensors and voltage references require cells that generate both PTAT (proportional to absolute temperature) and NTC (negative temperature coefficient) voltages. We present a novel theoretical approach based on a quasi-constant current to obtain these voltages in standard CMOS technology using no resistors. A test circuit was fabricated in a 0.8 mum, CMOS process. We performed measurements in a 305 K to 375 K temperature range which verify the expected results. The circuit draws under 50 nA from a 1.6 V to 3.0 V supply
Keywords :
CMOS integrated circuits; low-power electronics; reference circuits; temperature sensors; 0.8 micron; 1.6 V; 3.0 V; 305 to 375 K; 50 nA; CMOS cell; negative temperature coefficient; temperature sensor; test circuit; voltage reference; Biomedical measurements; CMOS process; CMOS technology; Circuit testing; Integrated circuit measurements; Permission; Resistors; Temperature distribution; Temperature sensors; Voltage; CMOS; Current reference; Design; Micropower; Temperature Sensor; Voltage reference;
Conference_Titel :
Integrated Circuits and Systems Design, 18th Symposium on
Conference_Location :
Florianopolis
Print_ISBN :
1-59593-174-0
DOI :
10.1109/SBCCI.2005.4286857
