By Geert Van der Plas
In the 1st half the AMGIE analog synthesis approach is defined. AMGIE is the 1st analog synthesis procedure that automates the whole layout technique from standards all the way down to demonstrated structure. it's certain to the layout of moderate-complexity circuits. It depends on layout and circuit wisdom saved 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 received with the AMGIE procedure are pronounced, 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 strategy is supported by way of instruments to spice up the productiveness of the dressmaker. An instance of any such device is Mondriaan, that's designated in the direction of the automated format iteration of hugely standard analog blocks. The proposed systematic layout technique is then utilized to the layout of high-accuracy current-steering electronic to analog converters (DACs). the total layout direction is mentioned intimately.
Both complementary ways raise analog layout productiveness. layout occasions of the several layout experiments undertaken are mentioned in the course of the booklet to illustrate this.
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Additional resources for A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits
For a more detailed description of the boundary checking and interval analysis filter and how the models stored in the cell library can be derived starting from the declarative model, the reader is referred to [Ves 97]. 4(b). 3(b) in that the interdependency (functions and between the performance parameters and has been taken into account. 3 Sizing and Optimization Tool 45 in the cell library, together with the remaining solution space (3) for those parameters after a calculation took place taking into account the relationship between and Point d for example belongs to the solution space of the topology for the given specifications, while point c is outside of it, in contrast with simple boundary checking that would accept both c and d.
The most important drawback of the method is the limitation of the design equations to be of posynomial and/or monomial form. As already mentioned, these recently reported research results are at the opposite ends of the spectrum. e. using multiple machines in parallel) to keep the turn-around time of simulation-based approach within bounds. It reduces the tedious modeling work as much as possible, this to make the conversion to an optimization problem as easy as possible. The second method applies a fast, global optimization algorithm to a fine-tuned equation-based model of the circuit.
1 Boundary Checking Filter The first two filters use quantitative information about the feasible nominal performance space of a topology which is stored in the cell library. 2 Topology Selection Tool 43 stored models, what the achievable performances of each topology in the selected technology process are, given the acceptable ranges in biasing values and device sizes, and that it is checked whether the specified performances are included in this performance space or not. Since the calculation of the actual performance space is a time-consuming process, this step is split in two consecutive filters.