A Linear Like Methodology for Source Allocation and Biasing Design of Non-linear Devices in Analog Circuits

摘要

The essential and often difficult step in the design of an analog circuit is 'biasing design'. The difficulty arises because traditional methods provides no separation between linear and non-linear components and hence a number of time consuming iterations may be required to get the 'operating points' fixed at the desired points in the load line. A methodology that completely removes the non-linearity of biasing design in analog circuit is presented. This method allows the designer to select the desired operating points for the non-linear components and start working on the remaining part of the circuit by avoiding the biasing iterations. Fixator-norator pair plays the key role in this method. Fixator keeps the design parameters fixed at the design whereas the pairing norator works as the placeholder for power conducting components or dc sources. Concept of hybrid equivalent circuit has also been presented and four examples have been worked out for better understanding of the methodology.