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This paper presents an optimization methodology for continuous time loop-filters design applied to Class-D amplifiers. The methodology is based on an evolutionary optimization approach which integrates both the topology selection and circuit sizing by automatically generating optimal sized topologies and performance tradeoffs for the Class-D amplifier. The presented approach is demonstrated for the...
In order to solve two major bottlenecks of the analog design flow: the time-to-market and the production yield, we introduce in this paper a design tool for measuring the robustness capability of the analog circuit topologies with the guarantee of fulfilling all the design specifications. With this measure, we can describe the feasible subspace by using the set inversion algorithm. A robustness estimation...
A low power inductorless variable gain amplifier (VGA) for wideband communication systems is presented in this paper. It is a resistor feedback close-loop amplifier based on a proposed wideband operational amplifier. The operational amplifier is constructed by an artificially differential N/P complementary cascode amplifying stage for high gain, and a self-biased N/P complementary source follower...
A detailed comparison of integrated CMOS charge amplifiers is presented in this work. Conventional topologies, along with new ones, have been fabricated in a CMOS test chip prototype and their measured performance compared in terms of sensitivity, PSRR, and frequency response. As a result of this work, a complete library of fabricated CMOS charge amplifiers is presented and the performance tradeoffs...
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