Symbolic behavioral modeling of low voltage amplifiers

Abstract

We present the generation of symbolic expressions of low voltage amplifiers by using nullors equivalents of the transistors (MOSFETs) which include only the dominant parasitic elements in order to make a simplification before generation. That way, a reduced system of nodal equations is formulated which can be solved easily by determinant decision diagrams. The advantage of the proposed method is that the resulting symbolic behavioral model is reduced to a minimum order and contains just the dominant circuit elements providing a good insight, which is very useful for analog designers.