time-domain steady-state analysis of circuits with multiple adaptive grids
abstract
an effective adaptive algorithm to calculate the steady-state response of circuits is developed.
this algorithm offers a powerful alternative to traditional steady-state simulation techniques,
such as the shooting method or harmonic balance (hb). a favourable feature of the algorithm
is that it obtains the unknown circuit solutions by using adaptive basis functions (abf). the
circuit equations are formulated by transformation matrices. one of the contributions of
this thesis is to use the least squares method instead of galerkin method to solve ordinary
differential equations with abf. another contribution is that the proposed algorithm uses
different grid resolutions to represent each state variable simultaneously. the position of the
grid points for each state variable is adaptively controlled by an algorithm that attempts to
minimize artifact oscillations in the solutions. the algorithm is demonstrated by simulating
two circuits and comparing the results with spice and aplac.
collections
- retrospective theses [1604]