Sub-kHz Clock Generation From Room Illumination on Standalone CMOS LSI Chips

Sub-kHz Clock Generation From Room Illumination on Standalone CMOS LSI Chips

Blog Article

This study proposes a sub-kHz clock generator by the room light illumination designed on-chip CMOS LSI chips.It generates a clock from a flicker in room light by receiving on-chip integrated photovoltaic cell, and extracts by ventilationstejp low-pass filters, a comparator, Schmidt trigger and D-flip-flop to shape to digital signal.The system implements two photovoltaic cells of a large cell for power generation and a small cell for photo-detection that enables standalone operations.

The system was designed on 0.18 $mu$m standard CMOS process, and both the simulation and experimental results validated the operation.By adding D-flip-flops at the output enables to modify the clock to $1/n$ product values that expands the applications.