Title :
A delay line with highly linear thermal sensitivity for smart temperature sensor
Author :
Trung, Nguyen Thanh ; Shon, Kwansu ; Kim, Soo-Won
Author_Institution :
Korea Univ., Seoul
Abstract :
A highly linear thermal sensitivity delay line for smart temperature sensor is presented. The proposed delay line is a current starved inverter chain. A simple bias current source circuit is incorporated with the delay line to generate a current inversely proportional to temperature based on the transconductance characteristics of a MOS device at the vicinity of the zero temperature coefficient (ZTC) point. Simulation results in a 0.18 mum CMOS technology show that the proposed delay line has a higher linearity within 0.24degC in a wider temperature range from -40degC to 120degC compared with conventional structures.
Keywords :
CMOS integrated circuits; delay lines; intelligent sensors; temperature sensors; CMOS technology; MOS device; bias current source circuit; delay line; highly linear thermal sensitivity; size 0.18 mum; smart temperature sensor; temperature -40 C to 120 C; transconductance characteristics; zero temperature coefficient; CMOS technology; Character generation; Circuit simulation; Delay lines; Inverters; Linearity; MOS devices; Temperature distribution; Temperature sensors; Transconductance;
Conference_Titel :
Circuits and Systems, 2007. MWSCAS 2007. 50th Midwest Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
978-1-4244-1175-7
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2007.4488716
