A Single-chip Proportional to Absolute Temperature Sensor Using CMOS Technology

Abstract—Nowadays it is a trend for electronic circuit designers to integrate all system components on a single-chip. This paper proposed the design of a single-chip proportional to absolute temperature (PTAT) sensor including a voltage reference circuit using CEDEC 0.18m CMOS Technology. It is a challenge to design asingle-chip wide range linear response temperature sensor for many applications. The channel widths between the compensation transistor and the reference transistor are critical to design the PTAT temperature sensor circuit. The designed temperature sensor shows excellent linearity between −100◦C to 200 ◦ and the sensitivity is about 0.05mV/◦C. The chip is designed to operate with a single voltage source of 1.6V. Keywords—PTAT, single-chip circuit, linear temperature sensor, CMOS technology. I