Geng Zheng

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An automated top-down design flow to achieve physical design of Analog/Mixed-Signal Systems-on-Chip (AMS-SoCs) is difficult, especially for nano-CMOS. Process variation effects have profound impact on the performance of silicon versus layout design. In this paper metamodels, (surrogate models) and Particle Swarm Optimization (PSO) have been combined in an(More)
—The optimized OP-AMPs resulting out of a traditional flows, although may meet the given specifications after consuming significant design cycle time, do not guarantee an optimal system performance. In this paper, a three-step polynomial metamodel-assisted OP-AMP optimization flow is proposed to address these issues. The flow incorporate polynomial(More)
Current Verilog-AMS system level modeling does not capture the physical design (layout) information of the target design as it is meant to be fast behavioral simulation only. Thus, the results of behavioral simulation can be very inaccurate. In this paper a <b>paradigm shift of the current trend</b> is presented that integrates layout level information(More)
In the current trend of short time-to-market and complex circuits and systems containing billions of nanoscale transistor, fast and accurate time-domain simulations are crucial for analog and mixed-signal (AMS) design and verification. This will ensure reduction in the non-recurrent cost and make electronics cheaper. In this paper, in order to investigate(More)
With the rapid developments in computer, communication and control technologies, the networked control systems (NCSs) have been a growing trend in industrial automation systems for the purposes of distributed management and control. This paper addresses the security issues of data transmitted in NCSs under deception attacks, especially confidentiality,(More)
Based on the strong tracking filter (STF), a STF-LQR control approach is presented for the control of a ball and beam system (BBS). The simple linearized mathematical model of the BBS is first obtained according to physics laws. In order to model the BBS accurately, an additional control action is introduced as an augmented state variable to compensate for(More)
This research addresses problems in designing analog and mixed-signal (AMS) systems by bridging the gap between system-level and circuit-level simulation by making simulations fast like system-level and accurate like circuit-level. The tools proposed include metamodel integrated Verilog-AMS based design exploration flows. The research involves design(More)