A High Stable RC Oscillator with Comparator Offset Cancellation Scheme
Long Shuan · 2014
A new RC oscillator architecture to solve deviation problem across the temperature and process variation is proposed. With zero temperature coefficient voltage reference and switch capacitor network, the oscillator achieved offset cancellation of the comparator and good temperature stability. The oscillator has several advantages such as immune to temperature and process variations, small area, low power consumption. Simulation results show that the RC oscillator outputs a 11.5 kHz clock with less than 1% deviation across the temperature range of-10 ℃ ~ 90 ℃.