A Compact IndustrialGrade MultiThreshold BrownOut Detector This work introduces the smallest reported brownout detector (BOD) that uses selectable lowpower reference voltages, as well as supply voltage division levels, to detect brownout events at different supply ranges. In contrast to reported BOD architectures, the proposed BOD compensates the lowtemperature impact for large impedance branches, particularly at large slewing of rampdown supply voltages. The circuit was implemented in a 180nm CMOS standard technology allocating an area of  60mu mathbfmtimes 100mu mathbfm  including the synthesized logic. Measurement results over voltage and temperature variations show a robust performance within the industrial temperature range from xe2x88x9240xc2xb0C to 125xc2xb0C. The BOD draws a typical current of 200nA with five different levels for diverse systemonachip applications.

A 0.5V 180nm CMOS SwitchedCapacitor Temperature Sensor with 319 nJmeasurement In this paper an ultralowpower switchedcapacitor (SC) temperature sensor realized in a 180 nm CMOS process is introduced. The sensor is operational at supply voltages down to 0.5 V, equivalent to the threshold voltages of the available MOS transistors. Using bipolar transistors for reference and temperature dependent voltage generation in a SC bandgap core, the overall temperature sensor is formed by a combination of the bandgap with a timediscrete pseudodifferential singleslope analogtodigital converter. The temperature sensor has a power consumption of 2.62 xc2xb5W (4.56 xc2xb5W) including all biasing and clock generation at supply voltages of 0.5 V (0.8 V), and achieves an estimated 3xcfx83 accuracy of 2.42xc2xb0C (1.36xc2xb0C) using a twopoint trim for the temperature range of 10xc2xb0C to 100xc2xb0C (xe2x88x9220xc2xb0C to 100xc2xb0C). Besides the temperature sensing functionality, the presented circuitry additionally provides a 24 kHz clock signal and stable reference voltage for other circuit blocks.