By Dan FitzPatrick, Ira Miller
This e-book definately desire an editor. some of the examples,even the elemental examples are riddled with mistakes. it truly is an okay learn yet do not count on to be a amateur after interpreting this ebook.
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Additional resources for Analog Behavioral Modeling with the Verilog-A Language
A conservative type of system, which includes those described by conventional Spice, incorporates a set of constraints within the system that insure conservation of charges, fluxes, etc. within the system. Signal-flow systems employ a different level of formulation, which focuses only on the propagation of signals throughout the system. 1 Conservative Systems Conservative systems are those that are formulated using conservation laws at the connection points or nodes. An important characteristic of conservative systems is that there are two values associated with every node or signal (and hence every port of a component of the system) - the potential (or across value) and the flow (or thru value).
The branch is directed from the first node of the access function to the second node. If the second node is not specified, the second node is taken as the ground or the reference node. 1 Probes Probes are formed from access functions whenever the access function is used in an expression. If the flow of the branch is used in an expression anywhere in the module, 34 Verilog-A HDL Probes, Sources, and Signal Assignment the branch is a flow probe, otherwise the branch is a potential probe. 19. The branch potential of a flow probe is zero.
For resistive loads, these types of discontinuities do not present problems. However, for capacitive or inductive loads, this type of behavior will potentially cause problems for the simulation. The Verilog-A language provides capabilities for the model developer to effectively handle such cases but still relies on the developer for recognizing and utilizing these capabilities. The mathematical validity and stability of the formulation of a model are important issues to consider when developing a behavioral model, particularly during the test and validation of the model.
Analog Behavioral Modeling with the Verilog-A Language by Dan FitzPatrick, Ira Miller