Sub-1-Mu S Start-Up Time, 32-Mhz Relaxation Oscillator For Low-Power Intermittent Vlsi Systems

We propose a sub-1-mu s start-up time, fully integrated 32-MHz relaxation oscillator (ROSC) for intermittent VLSI systems. Our proposed ROSC employs current mode architecture that is different from conventional voltage mode architecture. This enables compact and fast switching speed to be achieved. The measurement results demonstrated that the ROSC achieved sub-1-mu s start-up time and generated stable output frequency of 32.6 MHz. Measured line regulation, temperature coefficient, and variation coefficient in 10 samples were +/- 0.69, +/- 0.38, and 0.62%, respectively.