@article{(Open Science Index):https://publications.waset.org/pdf/5517, title = {The Invariant Properties of Two-Port Circuits}, author = {Alexandr A. Penin}, country = {}, institution = {}, abstract = {Application of projective geometry to the theory of two-ports and cascade circuits with a load change is considered. The equations linking the input and output of a two-port are interpreted as projective transformations which have the invariant as a cross-ratio of four points. This invariant has place for all regime parameters in all parts of a cascade circuit. This approach allows justifying the definition of a regime and its change, to calculate a circuit without explicitly finding the aparameters, to transmit accurately an analogue signal through the unstable two-port. }, journal = {International Journal of Electronics and Communication Engineering}, volume = {3}, number = {4}, year = {2009}, pages = {878 - 884}, ee = {https://publications.waset.org/pdf/5517}, url = {https://publications.waset.org/vol/28}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 28, 2009}, }