Boots – shoes – and leggings
Patent
1994-06-30
1996-07-16
Teska, Kevin J.
Boots, shoes, and leggings
364488, 364578, G06G 719
Patent
active
055373291
ABSTRACT:
A circuit analyzer and method are disclosed for generating and outputting a Pade via Lanczos (PVL) approximation of a frequency response of a circuit from input circuit parameters. A processing unit having a processor, memory, and stored programs processes the input circuit parameters, determines a block tridiagonal matrix by an iterative look-ahead Lanczos procedure, and calculates a Pade approximant from the block tridiagonal matrix, including poles, zeros, and residues. The look-ahead Lanczos procedure employs non-singular matrices to ensure numerical stability of the iterative calculation of the components of the block tridiagonal matrix. The output is an approximation of a plurality of frequencies at which any poles and zeros of the impulse response of the circuit occur. A graphical representation of the approximated frequency response is also produced, and qualitative measurements of the accuracy of the approximated poles are provided.
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Feldmann Peter
Freund Roland W.
AT&T Corp.
Frejd Russell W.
Teska Kevin J.
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