Signal-flow graph: Difference between revisions

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For linear active networks, Choma writes:<ref name=Choma>

{{cite journal |title=Signal flow analysis of feedback networks |author=J Choma, Jr |journal= IEEE Transactions on Circuits and Systems |volume=37 |issue=4 |date=April 1990 |pages=455–463 |url=http://wenku.baidu.com/view/e046d9d528ea81c758f578c7.html |doi=10.1109/31.52748|bibcode=1990ITCS...37..455C }}

</ref> "By a 'signal flow representation' [or 'graph', as it is commonly referred to] we mean a diagram that, by displaying the algebraic relationships among relevant branch variables of network, paints an unambiguous picture of the way an applied input signal ‘flows’ from input-to-output ... ports."

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[[File:Control parameter.PNG|thumb|upright=1.0|Figure 4: A different signal-flow graph for the [[asymptotic gain model]] ]]

[[File:Signal flow graph for feedback amplifier.png|thumb|upright=1.0 |A signal flow graph for a nonideal [[negative feedback amplifier]] based upon a control variable ''P'' relating two internal variables: ''x_j=Px_i''. Patterned after D.Amico ''et al.''<ref name=Damico>

{{cite journal |title=Resistance of Feedback Amplifiers: A novel representation |author=Arnaldo D’Amico, Christian Falconi, Gianluca Giustolisi, Gaetano Palumbo |journal= IEEE Transactions on Circuits and Systems – II: Express Briefs |url=http://piezonanodevices.uniroma2.it/wp-content/uploads/2013/04/Rosenstark.pdf |date=April 2007 |volume=54 |issue=4 |pages=298–302 |doi=10.1109/tcsii.2006.889713|bibcode=2007ITCSE..54..298D |citeseerx=10.1.1.694.8450 |s2cid=10154732 }}

</ref>]]

A possible SFG for the [[asymptotic gain model]] for a [[negative feedback amplifier]] is shown in Figure 3, and leads to the equation for the gain of this amplifier as

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|url=https://books.google.com/books?id=hPx70ozDJlwC&q=signal+flow+graph&pg=PA86}}

</ref>

** Reliability of electronic systems<ref>{{Cite journalbook |titlelast = ApplicationHapp|first of= flowgraphWilliam techniquesW.| totitle=Second Annual Symposium on the solutionPhysics of reliabilityFailure problems|lastin =Electronics Happ|first chapter=Application Williamof Flowgraph Techniques to the Solution of Reliability Problems W.|date = 1964|doi = 10.1109/IRPS.1963.362257|journal = Physics of Failure in Electronics|editor-last = Goldberg|editor-first = M. F.|issue = AD434/329|pages = 375–423}}</ref>

* [[Physiology]] and [[biophysics]]

** Cardiac output regulation<ref>{{Cite journal|title = The pioneering use of systems analysis to study cardiac output regulation|last = Hall|first = John E.|date = August 23, 2004|journal = Am J Physiol Regul Integr Comp Physiol|doi = 10.1152/classicessays.00007.2004|pmid = 15475497|volume=287|issue = 5|pages=R1009–R1011}}</ref>