Network theorem: Review-theoremt description Network theorem: Review- theorem description Replacement theorem: For any network which has a unique solution.if the Replacement theorem: branch can be re placed k)er a current source (lk) regardless of the composition of th After the replacement, the other branches in the network are unaffected Superposition theorem: I oth Widely used in Circuit Analysis are replaced by their internal impedances. Simplify the circuit structure. Reciprocity theorem: For linear twa-port network which has no source inside Reciprocity theorem: The Z and Is symmetric matrIxes. w )are the same for both directions. An ideal reciprocal phase shifter can introduce the sam phase shift for both directions Network theorem: Review -theorem description Replacement theorem Network which has a unique solution Superposition theorem Linear network Recp Linear passive two-port network北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 Network theorem: Review – theorem description Replacement theorem: Superposition theorem: Reciprocity theorem: For any network which has a unique solution, if the voltage and current are Vk and Ik in one of its branches, this branch can be replaced by a voltage source (Vk) or a current source (Ik) regardless of the composition of the branch. The response (Voltage or Current) in any branch of a bilateral linear circuit having more than one independent source equals the algebraic sum of the responses caused by each independent source acting alone, while all other independent sources are replaced by their internal impedances. For linear two-port network which has no source inside (no controlled source also), no matter which port is used for input, the ratio with the response from the other port is the same. e.g.: An ideal reciprocal phase shifter can introduce the same phase shift for both directions. 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 After the replacement, the other branches in the network are unaffected. Widely used in Circuit Analysis Simplify the circuit structure. The Z and Y matrix is symmetric matrixes. The transfer characteristic is symmetric of both directions. ——H(jω) are the same for both directions. Network theorem: Review – theorem description Replacement theorem: Superposition theorem: Reciprocity theorem: 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 北京大学 Network which has a unique solution Linear network Linear & passive & two-port network Network theorem: Review – theorem description Replacement theorem: Superposition theorem: Reciprocity theorem: