@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},
	}