Automated design of microwave discrete tuning differential capacitance circuits in Si-integrated technologies

摘要

A genetic algorithm used to design radio-frequencybinary-weighted differential switched capacitor arrays (RFDSCAs) ispresented in this article. The algorithm provides a set of circuits allhaving the same maximum performance. This article also describes thedesign, implementation, and measurements results of a 0.25 lmBiCMOS 3-bit RFDSCA. The experimental results show that the circuitpresents the expected performance up to 40 GHz. The similarity betweenthe evolutionary solutions, circuit simulations, and measured resultsindicates that the genetic synthesis method is a very useful tool fordesigning optimum performance RFDSCAs.