By Geert Van der Plas
In the 1st half the AMGIE analog synthesis approach is defined. AMGIE is the 1st analog synthesis process that automates the entire layout approach from standards right down to tested format. it truly is particular 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 approach are stated, together with genuine fabricated and measured circuits.
The moment strategy, i.e. the systematic layout of high-performance analog circuits, is mentioned within the moment a part of the publication. This strategy is supported through instruments to spice up the productiveness of the clothier. An instance of this type of device is Mondriaan, that's specified in the direction of the automated structure new release of hugely typical analog blocks. The proposed systematic layout method is then utilized to the layout of high-accuracy current-steering electronic to analog converters (DACs). the whole layout direction is mentioned intimately.
Both complementary techniques bring up analog layout productiveness. layout instances of the several layout experiments undertaken are stated through the e-book to illustrate this.
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Extra info for A Computer-Aided Design and Synthesis Environment for Analog Integrated Circuits
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. 10. 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.
In order to anticipate such obvious problems, a specification value checker has been implemented that checks if the specification values entered by the user are within an allowed realistic range (specified in the library for the functionblock), and that warns the user immediately if the requested values are invalid or unrealistic while suggesting a reasonable default value. The user can also deactivate a performance specification parameter in case it is unimportant for his particular application.
2 Design Flow and Hierarchy implemented in the AMGIE Synthesis System The design strategy implemented in the AMGIE analog synthesis environment is a performance-driven top-down refinement, bottom-up assembly strategy, which consists of the following sequence of design steps. For each of these steps a separate software tool implements this step: either a new tool that has been developed or an existing commercial tool 30 The AMGIE Analog Synthesis System (especially for simulation and back-end tasks) that has been integrated in the system.