Read e-book online Analog Behavioral Modeling with the Verilog-A Language PDF

By Dan FitzPatrick, Ira Miller

ISBN-10: 0306479184

ISBN-13: 9780306479182

ISBN-10: 0792380444

ISBN-13: 9780792380443

This e-book definately desire an editor. a few of the examples,even the fundamental examples are riddled with error. it really is an okay learn yet do not count on to be a beginner after examining this booklet.

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Extra info for Analog Behavioral Modeling with the Verilog-A Language

Example text

Analog begin end The block or compound statement defines the behavior of the module as a procedural sequence of statements. The block statement is a means of grouping two or more statements together so that they act syntactically like a single statement. 2. Resistor module illustrating a block statement attached to the analog statement. 0; real volts; 46 Verilog-A HDL Statements for Behavioral Descriptions analog begin volts = res*I(p, n); V(p, n) <+ volts; end endmodule The group of statements within the analog block are processed sequentially in the given order and at each timepoint during a transient simulation.

Changes in the potential at, or flow into, either end of the device would affect the other end to which the resistor component is connected. 2 Branches With conservative systems it is also useful to define the concept of a branch. A branch is a path of flow between two nodes. Every branch has an associated potential (the 26 Verilog-A HDL Types of Analog Systems potential difference between the two branch nodes), and a flow. The reference directions for a branch are as follows: The reference direction for a potential is indicated by the plus and minus symbols at each end of the branch.

Behavioral Descriptions 47 Behavioral Descriptions are examples of potential and flow branch contributions respectively. The right-hand side expressions, expr1 and expr2, can be any combination of linear, nonlinear, algebraic, or differential expressions of module signals, constants and parameters. A contribution statement is formed such that the output is isolated1. For example, given the following transfer function for H(s) : the transfer function relationship can be formulated in terms of the output, y(t), for the large-signal response as, from which, the behavioral relationship can be expressed in the Verilog-A language contribution statement as V(y) <+ ddt(V(y))/R + V(x); Where V(y), the potential of the signal y, or y(t) and V(x) is the potential of the signal x, or x(t).

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Analog Behavioral Modeling with the Verilog-A Language by Dan FitzPatrick, Ira Miller


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