# NANOTROPIC S.A.

NANOTROPIC S.A. Patent applications | ||

Patent application number | Title | Published |
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20140114636 | LARGE-SCALE POWER GRID ANALYSIS ON PARALLEL ARCHITECTURES - Systems and methods related to fast simulation of power delivery networks are described. A method is provided for simulating the time-domain responses of a plurality of points of a multi-layer power delivery network, comprising selecting a model of the power delivery network of a circuit, parsing the characteristic data describing the power delivery network, forming a circuit matrix relating to said circuit characteristic data, creating a preconditioner matrix with a specialized structure that allows solution by a Fast Transform solver, simulating the circuit using said circuit and preconditioner matrices by a computer, including a non-transitory computer readable storage medium and at least one processor, but preferably multiple processors, and reporting the responses at selected nodes and branches of the power delivery network. | 04-24-2014 |

20120016652 | SYSTEM AND METHOD FOR FAST POWER GRID AND SUBSTRATE NOISE SIMULATION - Systems and methods related to fast simulation of power supply networks and identification of a set of extrema (e.g., maxima or minima) waveforms associated with the power supply networks. In accordance with an embodiment, a method is provided for simulating an electrical circuit, comprising preselecting an input vector file, initializing a supply voltage to a fixed value, performing event driven simulation using the input vector file, so as to extract time-varying power supply current waveforms at a plurality of power grid points. The method also comprises simulating a power grid using a linear network simulator or other SPICE type simulation tool, so as to derive time-varying voltage waveforms from the current waveforms for each point on the power grid. The method further comprises comparing current and/or voltage waveforms with a previous simulation; and repeating the above steps from event driven simulation onwards, using a function of voltage waveforms from previous simulations, until the values of current and/or voltage waveforms converge within a pre-specified tolerance, or an iteration limit has been reached. | 01-19-2012 |

20110313738 | SYSTEM AND METHOD FOR CIRCUIT ANALYSIS - Systems and methods related to fast simulation of power supply networks and identification of a set of extrema (e.g., maxima or minima) waveforms associated with the power supply networks. In accordance with an embodiment, a method is provided for estimating the worst case voltage drop on the power delivery network of a circuit, comprising selecting a model of a power delivery network of a circuit, simulating the circuit over a predefined number of vectors, collecting dynamic voltage waveforms at each of a plurality of points on the power delivery network, calculating a dynamic worst case voltage waveform at each of the plurality of points, and reporting the dynamic worst case voltage waveform along with an associated confidence interval. | 12-22-2011 |