SPRINT: A DSP-based Electrical Simulator

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The main features of the new general-purpose circuit simulator based on Digital Wave algorithms are presented. The core algorithms including a wave calculation ordering processor were developed by Piero Belforte and Giancarlo Guaschino,, HDT founders, while Riccardo Sisto implemented Software modules regarding specific primitives of the simulator and the fast convolution calculator. The specific application to logic-timing-electrical simulation of high-speed boards were developed by Piero Belforte. This paper has been presented by Riccardo Sisto at The main features of the new general-purpose circuit simulator based on Digital Wave algorithms are presented. The core algorithms including a wave calculation ordering processor were developed by Piero Belforte and Giancarlo Guaschino,, HDT founders, while Riccardo Sisto implemented Software modules regarding specific primitives of the simulator and the fast convolution calculator. The specific application to logic-timing-electrical simulation of high-speed boards were developed by Piero Belforte.The main features of the new general-purpose circuit simulator based on Digital Wave algorithms are presented. The core algorithms including a wave calculation ordering processor were developed by Piero Belforte and Giancarlo Guaschino,, HDT founders, while Riccardo Sisto implemented Software modules regarding specific primitives of the simulator and the fast convolution calculator. The specific application to logic-timing-electrical simulation of high-speed boards were developed by Piero Belforte. This paper was presented by Riccar do Sisto at IASTED International Conference on Signal Processing and Digital Filtering, Lugano, Switzerland in June 1990.

Technology

SPRINT: A DSP-based Electrical Simulator

A parallel-plate capacitor implemented by a rectangular double-sided printed circuit board is characterized by means a stimulus signal injected at a corner. Both frequency-domain (VNA) and time-domain (TDR) techniques are utilized to determine the step response of the reflected wave (S11) to be compared to the theoretical behavior of the equivalent parallel plate capacitance. A commercial application is utilized to convert the frequency domain tabulated data of the frequency response into the corresponding TDR response. A very accurate and fast 2D TLM (Transmission Line Model) model can be easily extracted from these single time-domain experimental responses.

Automated Piecewise-Linear Fitting of S-Parameters step-response (PWLFIT) for...

Piero Belforte

An innovative full time-domain macromodeling technique for general, linear multiport systems is described. The methodology is defined in a digital wave framework and timedomain simulations are performed via an efficient method called Segment Fast Convolution (SFC). It is based on a piecewiseconstant (PWC) model of the impulse response of scattering parameters, computed starting from a piecewise-linear fitting of their step response (PWLFIT). Such step response is directly available from time-domain reflectometer measurements (TDR/TDT) or equivalent simulations. The model-building phase is performed in a fast automated framework and an analytic formulation of computational efficiency of the SFC with respect to the standard time-domain convolution is given. Two application examples are used to verify the PWLFIT performance and to perform a comparison with macromodeling methods defined in the frequency-domain, such as Vector Fitting (VF). Index Terms—Digital wave models, time-domain macromodeling, S-parameters, step response.

Cseltmuseum post records from September 2018 to January2019

Piero Belforte

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Multigigabit modeling of hi safe+ flying probe fp011

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This document describes the modeling methodology used to assess the performance of these probes in terms of allowed digital bandwidth of signals chosen for temporary fault insertion trials. This methodology is based on time-domain characterization of Scattering parameters (TDR/TDT) and subsequent extraction of a Behavioral Time-domain Model (BTM) [13] of the probe itself. This technique called PWLFIT (Piece-Wise Linear FITting) [14] [15]is supported by the Digital Wave Simulator DWS [16] [17] and its companion tool DWV [18] developed starting in the early '90s for very fast modeling and simulation of high-speed circuits and systems.

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