By Dan FitzPatrick, Ira Miller

Analog Behavioral Modeling With The Verilog-A Language presents the IC clothier with an creation to the methodologies and makes use of of analog behavioral modeling with the Verilog-A language. In doing so, an outline of Verilog-A language constructs in addition to functions utilizing the language are provided. additionally, the e-book is followed by means of the Verilog-A Explorer IDE (Integrated improvement Environment), a restricted power Verilog-A more desirable SPICE simulator for extra studying and experimentation with the Verilog-A language. This booklet assumes a easy point of knowing of using SPICE-based analog simulation and the Verilog HDL language, even though any programming language heritage and a bit selection should still suffice.
From the Foreword:
`Verilog-A is a brand new layout language (HDL) for analog circuit and structures layout. because the mid-eighties, Verilog HDL has been used broadly within the layout and verification of electronic structures. even though, there were no analogous high-level languages on hand for analog and mixed-signal circuits and platforms.
Verilog-A offers a brand new measurement of layout and simulation strength for analog digital platforms. formerly, analog simulation has been dependent upon the SPICE circuit simulator or a few by-product of it. electronic simulation is basically played with a description language equivalent to Verilog, that is well known because it is straightforward to profit and use. Making Verilog extra necessary is the truth that numerous instruments exist within the that supplement and expand Verilog's functions ...
Behavioral Modeling With the Verilog-A Language presents an exceptional creation and origin for college kids and working towards engineers with curiosity in realizing this new point of simulation expertise. This publication includes various examples that increase the textual content fabric and supply a valuable studying instrument for the reader. The textual content and the simulation application incorporated can be utilized for person examine or in a school room atmosphere ...'
Dr. Thomas A. DeMassa, Professor of Engineering, Arizona country University

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The Verilog-A module definitions of these elements, with their corresponding network representations, are shown in Figures 2-21 thru 2-24. 7 Analog System Simulation Analog simulation involves solving systems of ordinary differential equations that describe the system. The system of equations that define the circuit is of the 38 Verilog-A HDL Analog System Simulation form: where x is a vector representing the unknowns, the time rate of change of the unknowns, and u is a vector representing the external stimulus to the system.

3 Mixed-Level Descriptions The Verilog-A language allows the designer the flexibility to model components at various levels of abstraction. Mixed-level descriptions can incorporate behavior and structure at various levels of abstraction. Flexibility in choosing the level of abstraction allows the designer to examine architectural trade-offs for design performance and physical implementation. Analog System Description and Simulation 19 Analog System Description and Simulation One of the techniques available to designers for mixing levels of abstractions are mixed-level descriptions themselves - module definitions that incorporate both structural and behavioral aspects.

To determine the potential or Voltage between the two nodes, n1 and n2, the Verilog-A language uses the construct: V(n1, n2) where V is the access function for the potential nature of signals of type electrical. Similarly, to determine the flow or Current between the two nodes, use: I(n1, n2) where I is the access function for the flow nature of signals of type electrical. 2 on implicit branches. 2 Implicit Branches From the two nodes, n1 and n2, we can form an implicit branch1. To access the potential across the branch, refer to the potential binding in the electrical discipline definition.

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