Download A Top-Down, Constraint-Driven Design Methodology for Analog by Henry Chang, Edoardo Charbon, Umakanta Choudhury, Alper PDF

By Henry Chang, Edoardo Charbon, Umakanta Choudhury, Alper Demir, Eric Felt, Edward Liu, Enrico Malavasi, Alberto Sangiovanni-Vincentelli, Iasson Vassiliou

Analog circuit layout is frequently the bottleneck while designing combined analog-digital structures. A Top-Down, Constraint-Driven DesignMethodology for Analog built-in Circuits offers a brand new method in accordance with a top-down, constraint-driven layout paradigm that offers an answer to this challenge. this technique has primary merits: (1) it offers a excessive likelihood for the 1st silicon which meets all requirements, and (2) it shortens the layout cycle.
A Top-Down, Constraint-Driven layout method for Analog IntegratedCircuits is a part of an ongoing examine attempt on the college of California at Berkeley within the electric Engineering and computing device Sciences division. Many school and scholars, previous and current, are engaged on this layout technique and its assisting instruments. The critical ambitions are: (1) constructing the layout technique, (2) constructing and utilising new instruments, and (3) `proving' the method via project `industrial power' layout examples. The paintings provided here's neither a starting nor an result in the improvement of a whole top-down, constraint-driven layout technique, yet particularly a step in its improvement.
This paintings is split into 3 components. bankruptcy 2 offers the layout method in addition to starting place fabric. Chapters 3-8 describe helping innovations for the method, from behavioral simulation and modeling to circuit module turbines. eventually, Chapters 11th of September illustrate the technique intimately by means of offering the complete layout cycle via 3 large-scale examples. those comprise the layout of a present resource D/A converter, a Sigma-Delta A/D converter, and a video motive force procedure. bankruptcy 12 offers conclusions and present learn subject matters.
A Top-Down, Constraint-Driven layout method for Analog IntegratedCircuits could be of curiosity to analog and mixed-signal designers in addition to CAD software developers.

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Extra resources for A Top-Down, Constraint-Driven Design Methodology for Analog Integrated Circuits

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2 In general, an AID is designed to be insensitiveto process variations which are relatively small. Thus, thetransition points, t, change relatively little with respect to process variations. 3) where v is a random vector of parameters corresponding to process variations, such asoffsets andmismatches in components, g~ is a sensitivity matrix, andflt isa vector of the nominal transition points. 4) where Ev is thecovariance matrix of v. 5) Ingeneral, therank I't of Et ismuch less than full rank since notallthetransition points areindependent.

Such use of circuit Such prediction can can only only be achieved by the the use that analyze detailed waveforms. waveforms. g. g. SPICE [217][248]) simulators thatanalyze can provide accurate results, but but sometimes at the the expense of very long long (possibly can unaffordable) computing time. time. In In particular, when complex analog and and mixed-signal are being designed, accurate circuit circuit simulation simulation of the entire circuit circuit is out systems are the entire out of the in terms of the the question.

First-order derivatives for nonlinear models are obtained using techniques such as automatic symbolic differentiation [186] and simplicial subdivision [196], or Broyden's method is used to calculate modified nodal analysis(MNA) stamps for nonlinear models [34]. As it was pointed out at the beginning of this section, these new features provided in analog "multi-level" simulators are convenient extensions to the traditional macromodeling approach discussed in theprevi ous section. But, we believe that, theydo not provide any conceptual novelLy in analog "high-level" modeli ng over the traditional macromodeling approach, and suffer from the same problems.

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