Time Domain and Area Efficient Smart Temperature Sensor Exploiting Channel Length Modulation Coefficient.

This work suggests an all-digital temperature sensor with a high sampling rate that is based on a time-to-digital converter (TDC). Two on-chip voltage-controlled oscillators (VCOs) are used in the design of the sensor core, which senses temperatures between − 4 0 ∘ C and 200 ∘ C. For digital code conversion, the outputs of the VCO are fed into two asynchronous counters. In both low- and high- resolution modes, the error following two-point calibration is observed between − 1. 0 8 ∘ C and + 1. 0 6 ∘ C. The sensor's ability to function in both high- and low-resolution modes based on conversion time is an important feature. At a sampling frequency of 0.19 MHz, the maximum resolution achieved is 0.18 ∘ C. Additionally, the sensor has control logic built in to turn off the sensing as soon as the conversion is complete. At 90-nm process, 1.1 V supply voltage and 27 ∘ C, the proposed sensor occupies 0. 0 4 4 mm 2 and consumes 8 1 7. 5 μ W. [ABSTRACT FROM AUTHOR]