Control implied input/output buffering of power conservative two port networks

Most switched mode converters can be modeled by a controlled power conservative two-port network. In most cases the output voltage and current parameters are influenced by the input. By use of a suitable control signal it is possible to buffer the output from the input terminals. The buffering condition is formulated and its influence on the input characteristics of a switched mode converter is studied. It is shown that satisfying the buffering condition by a power conservative network implies creation of a power source characteristic. The power source is defined as a one-port element which delivers constant power at various terminal voltages and currents