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 summary of Verilog-A language constructs in addition to functions utilizing the language are offered. moreover, the booklet is followed via the Verilog-A Explorer IDE (Integrated improvement Environment), a restricted power Verilog-A better SPICE simulator for additional 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 historical past and a bit choice should still suffice.
From the Foreword:
`Verilog-A is a brand new layout language (HDL) for analog circuit and platforms layout. because the mid-eighties, Verilog HDL has been used broadly within the layout and verification of electronic platforms. in spite of the fact that, there were no analogous high-level languages on hand for analog and mixed-signal circuits and structures.
Verilog-A presents a brand new measurement of layout and simulation power for analog digital platforms. formerly, analog simulation has been established upon the SPICE circuit simulator or a few by-product of it. electronic simulation is basically played with a description language similar to Verilog, that's well known because it is simple to profit and use. Making Verilog extra valuable is the truth that numerous instruments exist within the that supplement and expand Verilog's services ...
Behavioral Modeling With the Verilog-A Language offers a very good creation and origin for college students and training engineers with curiosity in realizing this new point of simulation expertise. This ebook comprises quite a few examples that increase the textual content fabric and supply a worthwhile studying device 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 nation college
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Extra resources for Analog Behavioral Modeling with the Verilog-A Language
The behavior would be expressed as, V(out) <+ A*V(in); Changes in potential of the in port would be reflected as A*V(in) on the port out. However, any changes on the output port out would not be seen by the input port in. Signal-flow ports support a subset of the functionality of conservative ports in that KFL is not enforced. As such, one can always use conservative semantics to represent signal-flow components. 5 Signals in Analog Systems The Verilog-A language supports the description and simulation of systems used in many disciplines such as electrical, mechanical, fluid dynamics, and thermodynamics.
For conservative nodes (or ports and branches of conservative nodes), there are access functions for both the potential and flow. 7 Nature and discipline definitions for electrical systems. // Current in amperes nature Current units = "A"; access = I; abstol = 1e–12; endnature // Potential in nature Voltage units = = access = abstol endnature volts "V"; V; 1e-6; discipline electrical potential Voltage; flow Current; enddiscipline The discipline electrical consists of two nature declarations, Voltage and Current, respectively, with the potential and flow aspects of the quantities of signals of type electrical.
During transient analysis, these equations are solved incrementally with respect to time. Given the nonlinear nature of the system, at each time increment, equations are iteratively solved until they converge to a solution in which error criteria is satisfied. 1 Convergence To determine when iterative methods such as Newton-Raphson have converged to a sufficiently accurate solution, tolerance criteria is used. , Conservation of the constraints on charges, fluxes, currents, potentials, etc. within the system for KFL and KPL are satisfied: where is the iteration of the solution for x.
Analog Behavioral Modeling with the Verilog-A Language by Dan FitzPatrick, Ira Miller