Mapping of circuit variables into two-port network variables in basic amplifier structures: identifying new topologies

摘要

In this paper, we report on a unique observation which enables the unification of the analysis for different amplifier structures. In particular, we report that the change from one type of amplifier to the other can be understood via a mapping of source-load circuit variables (V_s,R_s,I_j,I_o,I_L,V_o) into two-port network variables (V_1, V_2, I_1, I_2). As such, unified expressions for (A_v,Z_i,A_i,Z_o) are derived. Further, a Matlab code is written to search for all valid mappings out of 38 different possibilities.