On The Sensitivity Analysis Of Analog Circuits

Abstract The paper presents three procedures for the sensitivity analysis using auxiliary circuits: the Bykhovsky Perkins Cruz’s method, the incremental-circuit approach and the adjoint-circuit approach. All methods, based on the auxiliary circuits, have needed an efficient partially-symbolic method for the circuit analysis. For this, it was elaborated a very good procedure for the partially-symbolic analysis of the circuits based on the modified nodal equations and on the semi-state equations. This method was implemented in a program- SYCIAN – Symbolic Circuit Analysis. SYCIAN program can analysis together the original circuit and the auxiliary circuit for the complex linear time-invariant analog circuits. In this paper we will show that the methods of the sensitivity computation, based on the auxiliary circuits, become very competitive ones, if it is used the SYCIAN program. It is also underlined the advantages and disadvantages of the three procedures. Some illustrative examples are presented