A 500 pW 16 KHz Injection Locked Oscillator for Ultra-Low Power Time-Domain ADC Application

Abstract

This paper presents an Ultra-Low Power Injection Locked Oscillator (ILO) circuit dedicated to Time-Domain ADC architectures. More particularly, it is shown that the power consumption of the ILO depends on its locking range. It is also shown that ILO based phase shifter power consumption could be optimized by adapting its locking range to the full scale of its input. The circuit works on a 0.4V supply voltage, with a 500 pW power consumption and a 16 KHz locking range.