A second-order temperature compensated 1μW/MHz 100MHz RC oscillator with ±140ppm inaccuracy from -40°C to 95°C

On-chip RC-based frequency references are increasingly being used to generate device clocks. They consume lower power, occupy a small area, and do not require costly off-chip components. However, poor frequency accuracy resulting from their non-linear temperature sensitivity has limited their usage to systems that can tolerate large frequency inaccuracy (~1%). Several efforts are underway to reduc...