[ibis-macro] EMD Pole-Zero Models (Why voltage controled sources?)
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: "IBIS Macro" <ibis-macro@xxxxxxxxxxxxx>
- Date: Sun, 29 Jun 2008 13:25:15 -0400
All,
Based on the following assumptions for an EMD:
* A module as a netlist of IBIS components and external pins
* Interconnect models between these IBIS component pins consist of a
netlist
of interconnect blocks
* Interconnect block models are:
* Resistors
* Inductors
* Capacitors
* Distributed RLGC models
* S parameter Models
* Impulse Response Models
* Pole-Zero Models
The purpose of this e-mail is to raise the issue of what is a Pole-Zero
model and why do we need voltage controlled sources.
I refer to http://www.ece.uci.edu/docs/hspice/hspice_2001_2-217.html
Understanding Pole/Zero Analysis
In pole/zero analysis, a network is described by its network transfer
function which, for any linear time-invariant network, can be written in the
general form:
In the factorized form, the general function is:
It seems to me that a Pole-Zero model can either be represented as a set of
numbers like the polynomial coefficients a0, b0, a1, b1, a2, b2, .. or the
factorized form a0, b0, z1, p1, z2, p2, ?
Where is the controlled voltage source?
I assume that one can model the pole-zero form into Spice, Verilog, and VHDL
primitives, and doing so might utilize controlled voltage sources and other
simulator specific models.
Why it is not sufficient to just have a Pole-Zero model (either with
polynomial coefficients and/or pole-zero coefficients).
Walter
Other related posts:
