Internet-of-Things (IoT) devices are meant to be powered by energy harvesters, which unfortunately tend to generate very little power at very low voltages, often well below the threshold voltage of CMOS transistors. Hence the need for an ultra-low power (ULP) and ultra-low voltage (ULV) operation of IoT electronic circuits. This talk presents recent breakthroughs in collaboration with TSMC in sub-threshold designs of an all-digital PLL (ADPLL), RF Bluetooth transmitter, and open-loop VCO-based ADC. The supply voltage in these circuits can go to as low as 0.2V.
Internet-of-Things (IoT) devices are meant to be powered by energy harvesters, which unfortunately tend to generate very little power at very low voltages, often well below the threshold voltage of CMOS transistors.