Patent Document ID: 20100106474
Application ID: 12616458
Patent Flag: 0

Claim One:
1. A method of modeling linear properties of an electrical component having n>1 ports, whose linear properties are described in a matrix Y relating a voltage applied to the ports to a current through the ports, wherein a dependence of Y on an independent variable s is approximated by a model 
 Y=F ( s, p 1 ,. .. , p K ), with p 1 ,. .. , p K being parameters of the model and F being a matrix-valued function describing the dependence of Y on the variable s, said method comprising a passivation step of ensuring a passivity of said model by perturbing said parameters p 1 ,. .. , p K to a perturbed set of parameters p 1 +Δp 1 ,. .. , p K +Δp K while ensuring that the perturbed set of parameters fulfils a Boolean valued condition function 
 C ( p 1 +Δp 1 ,. .. , p K +Δp K )=true,  [1.2] wherein said passivation step comprises the step of finding an approximate solution for the equations [ F ( s , p 1 + Δ p 1 , … , p K + Δ p K ) - F ( s , p 1 , … , p K ) ] · t i  λ i  ≅ 0 , [ 1.3 ] for i=1. .. n, wherein t i and λ i are the eigenvectors and eigenvalues of matrix Y.