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This paper discusses the design issues of highly efficient and monolithic wideband RF polar transmitters, especially the ones that use the Envelope-Tracking (ET) technique. Besides reviewing the state-of-the-art polar transmitters in the literature, three focus topics will be discussed: (1) the system-on-a-chip (SoC) design considerations of the monolithic polar transmitter using ET; and (2) the design...
A multiple-input converter (MIC) is devoted to combining on-board energy sources in the electric vehicles (EVs) and hybrid-electronic vehicles (HEVs). By analyzing the structure of the single-input converters, the basic cells including the pulsating source cells (PSCs), the buffer cells (BCs) and the output filter are proposed for deriving various MIC topologies. MIC can be categorized into two lists,...
This paper presents a preliminary result for the problem of robust Hinfin control for linear uncertain switched systems with time-varying delay. Based on multi-Lyapunov function method and linear matrix inequality method, a sufficient condition for switched systems with robust stability and Hinfin criteria gamma using a state-based switching law is proposed.
In the power system with two or more renewable energy sources, it can simplify the circuit configuration and reduce the cost by using a multiple-input converter instead of several single-input converters. Taking double-input buck converter (DIBC) as the example, this paper discusses the relationship between the inductor current ripple and the phase difference among the drive signals, and an interleaved...
As the number of disks in a storage sub-system keeps increasing, the back-end network may become the bottleneck and thus impose a constraint on system performance. Unfortunately, there is no visible literature base on storage back-end network bottlenecks and scalability. This paper studies the scalability of the back-end network by answering two questions: (1) which factors affect the back-end network...
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