From add5adbbbe0829b1700ef9d3a35493c690c7474f Mon Sep 17 00:00:00 2001 From: "Robin P. Clark" Date: Tue, 17 Sep 2013 10:18:30 +0100 Subject: [PATCH] CH8 composition of {\fgs} --- submission_thesis/CH8_Conclusion/copy.tex | 30 +++++++++++++---------- 1 file changed, 17 insertions(+), 13 deletions(-) diff --git a/submission_thesis/CH8_Conclusion/copy.tex b/submission_thesis/CH8_Conclusion/copy.tex index eab3223..c1ee025 100644 --- a/submission_thesis/CH8_Conclusion/copy.tex +++ b/submission_thesis/CH8_Conclusion/copy.tex @@ -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}. %