robin/Robin_PHD
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

CH8 composition of {\fgs}

Browse Source
This commit is contained in:
Robin P. Clark 2013-09-17 10:18:30 +01:00
parent a6715889f0
commit add5adbbbe
1 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
submission_thesis/CH8_Conclusion/copy.tex
View File

@ -169,38 +169,42 @@ work together to perform a pre-defined function.
%
The choice for {\fg} membership is made by the analyst.
%
The act of choosing component to comprise a {\fg}
The act of choosing components to form a {\fg}
raises questions about the circuit under investigation.
%
Ideally {\fgs} will be able to act as standalone modules.
%
An inverting amplifier configuration, or a low pass filter are good examples of these.
%That is they should perform their function in the context of teir use, but
%
These have clear inputs and outputs, and are resilient to what they are connected to at
An inverting amplifier configuration, or a low pass filter are good examples of these:
they have clear inputs and outputs, and are resilient to what they are connected to at
the output (in electronics terms they have high output impedance).
%
In defining members for {\fgs} he analyst is forced to consider the interfaces between elements
of circuitry to identify modules.
In defining members for {\fgs} the analyst is forced to consider the interfaces between elements
of circuitry to identify modules.
%
This is to prevent undue influence on them from circuitry
they may be connected to.
%
Consider the resistor capacitor low pass stage first looked at in example~\ref{sec:lp}. %\label{sec:lp}
%
This circuit element, while applying a filtering effect, has a low output impedance.
%
With a simple OpAmp buffer amplifier it becomes an effective, high impedance output, standalone module.
%
These two elements, the resistor capacitor low pass stage and the OpAmp
are good candidates therefore, for being considered as a standalone module, and thus a {\fg}.
With a simple OpAmp buffer amplifier on its output stage, it becomes an effective high impedance output standalone module.
%
The resistor/capacitor low pass stage and the OpAmp
are good candidates therefore for being considered as a standalone module, and thus a {\fg}.
However, different analysts may choose different {\fgs}
when analysing the same circuit.
%
This means that {\fgs} are not guaranteed to be unique.
%
This apparent anomaly is explored in the examples~\ref{sec:invamp},~\ref{sec:bubba} were different
structure of the FMMD hierarchy are used to analyse the same circuitry.
This apparent anomaly is explored in the examples~\ref{sec:invamp},~\ref{sec:bubba} where different
structures of the FMMD hierarchy were used to analyse the same circuitry.
%
The same system level failure modes are obtained, but the more de-composed examples
offer better performance in terms of comparison complexity.
The same system level failure modes were obtained, but the more de-composed examples
offered better performance in terms of comparison complexity.
%
Further work may be required to apply justification for the choice of the membership in {\fgs}.
%