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SWITCAP: Simulator for Ideal Switched Capacitor Networks

总结

Lead Inventors: Yannis Tsividis, Ph.D.Problem or Unmet Need:An important class of mixed analog-digital VLSI circuits can be termed mixed switched-capacitor/digital (SC/D) networks. These contain capacitors, sources, switches driven by clocks or by signals, and digital logic. The complexity of these circuits is such that simulation is a must, yet traditional simulation tools for time-invariant networks such as SPICE and ASTAP are not adequate for accurately computing the sharp waveform transitions generated by switching efficiently. Several methods have been reported for simulating general mixed analog/digital networks, but fail to take full advantage of the algebraic nature of network equations in the case of mixed SC/D networks. Details of the Invention:SWITCAP is a unified linear switched-capacitor network (SCN) and SC/D network simulator. It incorporates comparators, switches controlled by periodic or non-periodic logic signals, and logic gates with multiple inputs in additional to all SCNs regular network elements. The comparators and switches allow for signal dependent modification of circuit topology, and many interesting nonlinear circuits can be modeled. Major features of SWITCAP include: an arbitrary number of switching intervals, many network elements, time-domain analyses of linear SCN's and mixed SC/D networks, various waveforms for time-domain analyses, frequency domain analyses, and built-in sampling functions.

技术优势

Unified SCN and SC/D simulator Efficient and accurate simulation Time and Frequency domain analyses

详细技术说明

SWITCAP is a unified linear switched-capacitor network (SCN) and SC/D network simulator. License this software here: http://bit.ly/switcap

*Abstract

None

*IR

Proxy30

*Principal Investigation

*Publications

Developer's website: SWITCAP Simulator for Ideal Switched Capacitor NetworksK. Suyama, S. Fang, Y. Tsividis. "Simulation of Mixed Switched-Capacitor/Digital Networks with Signal-Driven Switches." IEEE Journal of Solid-State Circuits, Vol. 25, No. 6, 1990. S. Fang, Y. Tsividis, O. Wing. "Time and Frequency Domain Analysis of Linear Switched-Capacitor Networks Using State Change Variables." IEEE Transactions on Computer-Aided Design, Vol. CAD-4, No. 4, 1985.

*Web Links

http://bit.ly/switcap

国家/地区

美国