Fast Optimization for VCOs Using GSA Algorithm

摘要

Finding the optimal size in VLSI circuits such as voltage controlled oscillator is one of the challenging tasks for IC designers. VCO is one of the most widely used blocks in both digital and analog circuits. In this paper, a new approach has been presented to find the optimum size of transistors in order to optimize phase noise and power in ring VCOs. In this work, the gravitational search algorithm (GSA) is employed to optimize the size of transistors for the purpose of reaching the best phase noise and power. Tested differential ring VCOs are simulated in 65nm Cadence Virtuoso by considering the size of transistors extracted from GSA in MATLAB environment.