By Geert Van der Plas
In the 1st half the AMGIE analog synthesis procedure is defined. AMGIE is the 1st analog synthesis approach that automates the whole layout procedure from standards all the way down to confirmed format. it truly is exact to the layout of moderate-complexity circuits. It is determined by 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 interior workings are defined intimately, with (practical) examples to illustrate how the carried out algorithms and strategies paintings. Experimental effects acquired with the AMGIE procedure are stated, together with real fabricated and measured circuits.
The moment process, i.e. the systematic layout of high-performance analog circuits, is mentioned within the moment a part of the ebook. This technique is supported by means of instruments to spice up the productiveness of the dressmaker. An instance of this sort of software is Mondriaan, that's designated in the direction of the automated format iteration of hugely common analog blocks. The proposed systematic layout technique is then utilized to the layout of high-accuracy current-steering electronic to analog converters (DACs). the complete layout direction is mentioned intimately.
Both complementary techniques elevate analog layout productiveness. layout occasions of different layout experiments undertaken are stated during the e-book to illustrate this.
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Within the first half the AMGIE analog synthesis method is defined. AMGIE is the 1st analog synthesis method that automates the total layout technique from requisites all the way down to proven format. it really is unique to the layout of moderate-complexity circuits. It depends upon layout and circuit wisdom saved within the tool's libraries and will be utilized by either beginner and skilled analog designers in addition to system-level designers.
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Additional resources for A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits
Sizing and optimization (step 3) is then rather specification translation which maps the specifications of the top-level cell to the individual specifications of each of the subcells (such as the comparator in the A/D-converter). The subcells are then synthesized separately (step 5), one by one, using the same design flow, and the resulting subblock layouts are returned up the hierarchy to assemble the layout of the top-level cell (bottom-up layout assembly in step 6). If needed, redesign iterations are carried out across the design hierarchy.
They are implemented in if-then form. 3 Sizing and Optimization Tool After topology selection an unsized schematic is available. g. power consumption). At higher levels in the design hierarchy the tool searches for the optimum subblock parameters. Note that hierarchy is used only when a decomposition in more or less non-interacting subblocks is possible. For example, in our approach an OPAMP is sized as 46 Detailed Description of the AMGIE Analog Synthesis System one block and is not further decomposed into subblocks like differential pairs, current mirrors, etc.
A definition has been given for analog synthesis, which is the main topic of this text. Next an overview has been given of the research that has been carried out over the years in this area. Three generations of synthesis tools and systems have been identified and their advantages and disadvantages summarized. The major limitations of the approaches proposed up till now are: (1) that they do not offer an integrated environment, (2) that they do not cover the complete design flow, and (3) that they are not easily extendible with new circuits, ideas, etc.
A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits by Geert Van der Plas