Abstract:
This paper presents the design of an All-DigitalTemperature Sensor (ADTS) with low power supply sensitivity
(PSS). In this architecture, the delay cell-based ring-oscillator
acts like a temperature sensor. The delay cells have been designed featuring the voltage compensation technique. This paper
demonstrates the improvement over the conventional Current
Starved Ring Oscillator (CSRO), and Voltage Compensated Ring
Oscillator (VCRO) based temperature sensor. The proposed
design consumes only 180/xW power, exhibits PSS of 0.034°C/mV
(i.e., 6-12%) and generates an error of only -0.4°C to +0.8°C
across process com ers and over the temperature range -40°C to
150°C and supply range of 1.8V +/-10%.
