By Geert Van der Plas
In the 1st half the AMGIE analog synthesis process is defined. AMGIE is the 1st analog synthesis procedure that automates the entire layout technique from necessities all the way down to tested structure. it's precise to the layout of moderate-complexity circuits. It is dependent upon layout and circuit wisdom kept within the tool's libraries and will be utilized by either amateur and skilled analog designers in addition to system-level designers. the internal workings are defined intimately, with (practical) examples to illustrate how the applied algorithms and methods paintings. Experimental effects acquired with the AMGIE method are suggested, together with real fabricated and measured circuits.
The moment procedure, i.e. the systematic layout of high-performance analog circuits, is mentioned within the moment a part of the publication. This process is supported by means of instruments to spice up the productiveness of the fashion designer. An instance of any such device is Mondriaan, that's exact in the direction of the automated format iteration of hugely ordinary analog blocks. The proposed systematic layout method is then utilized to the layout of high-accuracy current-steering electronic to analog converters (DACs). the complete layout course is mentioned intimately.
Both complementary methods elevate analog layout productiveness. layout instances of the various layout experiments undertaken are pronounced through the ebook to illustrate this.
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Additional resources for A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits
2 is not visible on this graph. e. without redesign steps). The complete graph with inclusion of all redesign paths would be too complicated to show. What is modeled in this graph is the state of the system, represented by the circles, and the processes being executed going from one state to the next. For instance, the specification state is the start of a new design. 4 The AMGIE Synthesis System 37 there Topology Selection is run and one ends up in the topology selection state. The next logical step is running sizing and optimization, reaching the sizing and optimization state, and so on.
24 The AMGIE Analog Synthesis System At the other end of the spectrum the tools reported in [Hers 98, Hers 99] are found. Here the idea is to apply an extremely fast optimization algorithm to the analog sizing problem. A Geometric Program (GP) [Duff 67] is an optimization problem of the following form: let x be a vector of n real, positive variables and where are posynomial functions and are monomial functions. , t = 1, f is a monomial function. A geometric program is convex by definition, and the local optimum that is found using interior point methods is thus the global optimum.
Library developers provide this information. This category of users has an interface to the libraries (cell and technology) where they can add, modify and remove device, topology and functionblock data. A library developer is a highly trained person: ideally (s)he is an experienced analog designer, who has an extensive understanding of the AMGIE system and its operation. This set of skills is however hard to develop. 5, etc. 9). 9. It manages the design process and design data [VdPlas 94]. The design controller implementation is centered around a state transition model of the design process.
A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits by Geert Van der Plas