Li P.-YLee W.-ELin C.-TWu L.-TTSUNG-HSIEN LIN2021-09-022021-09-022020https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093703873&doi=10.1109%2fVLSI-DAT49148.2020.9196368&partnerID=40&md5=4fa1f7b02895023d0d85bcc0ba5d129ehttps://scholars.lib.ntu.edu.tw/handle/123456789/581172A resistor-based temperature sensor with a 2nd-order 1-bit continuous-Time delta-sigma modulator (CTDSM) to realize an energy-efficient temperature sensor is presented. The chopping technique is applied to alleviate the offset and flicker noise of the 1st-stage amplifier. A finite impulse response (FIR) filter is incorporated in the feedback path to mitigate noise fold-back due to chopping operation. The proposed circuit, implemented in 0.18-μm CMOS, consumes 183.6 μW from a 1.8-V supply. With a single conversion time of 333.3 μs, the temperature resolution is less than 3.71 m°C (1δ), which leads to a Figure of merit (FoM) of 0.84 pJ°C2. The 3δ temperature inaccuracy of 8 chips under a range of-40 °C to 100 °C is 3.8 °C after 1-point and batch calibration. ? 2020 IEEE.Chopper; continuous-Time delta-sigma modulator; finite impulse response filter[SDGs]SDG7CMOS integrated circuits; Continuous time systems; Delta sigma modulation; Energy efficiency; FIR filters; Impulse response; Temperature sensors; VLSI circuits; Continuous-time; Conversion time; Delta sigma modulator; Energy efficient; Feedback paths; Figure of merit (FOM); Flicker noise; Temperature resolution; Modulatorsconference paper10.1109/VLSI-DAT49148.2020.91963682-s2.0-85093703873