Friday 19 August 2011

Wseas Transactions

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Transactions: WSEAS Transactions
Transactions ID Number: 18-115
Full Name: Bohumil Brtnik
Position: Assistant Professor
Age: ON
Sex: Male
Address: College of Polytechnics, Tolsteho 16, 586 01 J ihlava
Country: CZECH REPUBLIC
Tel: 567 141 119
Tel prefix: 420
Fax: 567 300 727
E-mail address: brtnik@vspj.cz
Other E-mails:
Title of the Paper: Full-graph solution of switched capacitors circuits by means of two-graphs
Authors as they appear in the Paper: Bohumil Brtnik
Email addresses of all the authors: brtnik@vspj.cz
Number of paper pages: 11
Abstract: Circuits with switched capacitors are described by a capacitance matrix. As there are also graph methods of circuit analysis in addition to algebraic methods, it is clearly possible in theory to carry out an analysis of the whole switched circuit in two-phase switching exclusively by the graph method as well. The phase of switching are called even (E) and odd (O), not 1 and 2 to avoid confusion between the sign of the phases and of the nodes. For this purpose it is possible to plot a Mason graph of a circuit, use two graphs to reduce oriented graphs for all the four phases of switching, and then plot a summary MC-graph from charge and voltage graphs. Summary MC-graph is now constructed by the incomplete common skeletons of the V-graph and the Q-graph in all four phases, branches obtained for EO and OE phase are drawn between these nodes, while their resulting transfer is multiplied by to express the delay between the two phases. This summary MC-graph can then be !
interpreted by the Mason's relation to provide transparent voltage transfers, and so it is possible to reach the final result a quite fully graphically. This method can be used for circuits containing operational amplifier with the break point frequency, too, but summa graph is rather complicated in this case, because this description is based on the modified nodal method, where the number of nodes is remains
Keywords: Switched capacitors, two-graphs, Mason-Coates graph, summa graph, Mason´s rule, break point frequency
EXTENSION of the file: .pdf
Special (Invited) Session: Graph-Only Solution of SC Circuits by Means of Two-Graphs
Organizer of the Session: 659-157
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