New Analysis and Design Technique for Analog Circuits

Desirable biasing of nonlinear devices in an analog circuit is an essential step and often difficult. The difficulty comes from the fact that for biasing nonlinear devices we need to go through an iteration procedure that is usually timely and may end up with divergence. A new methodology is presented here that completely removes the nonlinearity of the biasing in a design procedure. The method also simplifies the analysis by using the "additivity" property, typically used in linear circuits. The method focuses on local biasing using a port nullification technique that isolates the nonlinear devices from the linear portion of the circuit. This method allows a circuit designer to select his/her desired operational regions for the nonlinear devices, and start working on the rest of the (linear) circuit avoiding biasing iterations or even a possible divergence.