2. Quadrupoles and multidipoles

Figure 1 - Superposition theorem

Figure 2 - Voltage and current dividers

Figure 3 - Dual circuits

Figure 4 - Thévenin equivalent

Figure 5 - Example of Thévenin equivalent

Figure 6 - Application of Thévenin&#039;s theorem

Figure 7 - Norton equivalent

Figure 8 - Triangle-star transformation

Figure 9 - Triangle-star transformation:  and T representation

Figure 10 - Triangle-star transformation of an active structure

Figure 11 - Paralleling several voltage generators

Figure 12 - Conventional representation of a quadrupole

Figure 13 - Quadrupole connected to external circuits

Figure 14 - Calculation of Z parameters

Figure 15 - Calculation of Y parameters

Figure 16 - Electrical models with two linked sources

Figure 17 - Single-source electrical models

Figure 18 - Cascade association

Figure 19 - Parallel association

Figure 20 - Finding a circulation current for a parallel combination

Figure 21 - Example of circulation current search in a parallel association

Figure 22 - Serial association

Figure 23 - Searching for a circulating current for a series combination

Figure 24 - Example of finding a circulating current in a series combination

Figure 25 - Parallel association-series

Figure 26 - Parallel-series association

Figure 27 - Perfect transformer

Figure 28 - Reduced series impedances

Figure 29 - Reduced parallel admittances

Figure 30 - Primary bridge impedance

Figure 31 - Quadrupole association made possible by a transformer

Figure 32 - Perfect three-winding transformer

Figure 33 - Reduced admittances