By Henry Chang, Edoardo Charbon, Umakanta Choudhury, Alper Demir, Eric Felt, Edward Liu, Enrico Malavasi, Alberto Sangiovanni-Vincentelli, Iasson Vassiliou
Analog circuit layout is usually the bottleneck while designing combined analog-digital platforms. A Top-Down, Constraint-Driven DesignMethodology for Analog built-in Circuits provides a brand new technique in accordance with a top-down, constraint-driven layout paradigm that gives an answer to this challenge. this system has valuable merits: (1) it offers a excessive likelihood for the 1st silicon which meets all necessities, and (2) it shortens the layout cycle.
A Top-Down, Constraint-Driven layout technique for Analog IntegratedCircuits is a part of an ongoing examine attempt on the college of California at Berkeley within the electric Engineering and machine Sciences division. Many school and scholars, prior and current, are engaged on this layout method and its helping instruments. The significant objectives are: (1) constructing the layout technique, (2) constructing and employing new instruments, and (3) `proving' the technique by way of project `industrial power' layout examples. The paintings provided here's neither a starting nor an lead to the advance of an entire top-down, constraint-driven layout method, yet fairly a step in its improvement.
This paintings is split into 3 components. bankruptcy 2 offers the layout technique besides starting place fabric. Chapters 3-8 describe assisting suggestions for the technique, from behavioral simulation and modeling to circuit module turbines. eventually, Chapters September 11 illustrate the method intimately by way of proposing 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 driving force approach. bankruptcy 12 offers conclusions and present examine subject matters.
A Top-Down, Constraint-Driven layout technique for Analog IntegratedCircuits could be of curiosity to analog and mixed-signal designers in addition to CAD software developers.
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Extra info for A Top-Down, Constraint-Driven Design Methodology for Analog Integrated Circuits
H. C. Berkeley, is recognized worldwide as the standard in circuit simulation. Sr-rcs-based or SPIc E-like simulators are used extensively throughout the analog design community for design space exploration, and for the final prefabrication verification of the detailed electrical behavior of the sub-blocks and the system. In Srt cs -like simulators, circuitscan contain resistors, capacitors, inductors, independent/dependent voltage/current sources, transmission lines, switches, distributed RC lines and semiconductor devices (diodes, BJTs, JFETs, MOSFETs, MESFETs) .
7 bythesolidline. Thedotted linerepresents theideal behavior. Problematic points are indicated on the curve. Point A shows that there is no "off" state. Point B illustrates an extreme deviation from the ideal. In a signal processing system, this could result in large unwanted harmonics. PointC shows anarea of non-monotonicity. In a feedback system, thiscould resultin a disastrous reversal of the feedback polarity. PointD shows an extremely highoutput. Thiscould overload the next stage. Methods for characterizing these non-idealities have been developed.
In the remainder of this chapter, we present examples of our work on behavioral simulation and modeling for analog circuits. In particular, we will present behavioral models and simulation techniques for Nyquist-rate data converters, noise in mixedmode sampled data systems, and phase-locked systems. 1 Background Data converters convert the continuous-time, continuous-amplitude analog signals in the outside world to discrete-time, discrete-amplitude digital signals in electronic systems, and vice-versa.