Kenneth S Kundert, Age 692952 E 7Th St, Oakland, CA 94601

6381563, Apr 30, 2002

Jan 22, 1999

09/236196

Donald J. ORiordan - Sunnyvale CA
Walter J. Ghijsen - Los Gatos CA
Kenneth S. Kundert - Los Altos CA

Cadence Design Systems, Inc. - San Jose CA

G06F 9455

703 14, 716 5

A system and method for generating inline subcircuits that enable a circuit designer to model and simulate circuits that when compared to conventional system and methods reduces the hierarchy from the perspective of the circuit designer, more efficiently models parasitic components, more efficiently parameterizes device models, more effectively creates models that are compatible with other simulation tools, can change the interface of a component without requiring the designer to use an extra layer of hierarchy, provides a more efficient interface by hiding details from the designer, enables hidden monitors and other functional designs to be automatically simulated by hiding these functions from the designer in a design level that is below the design level that is of interest to the designer, such as the geometrical parameter design level, can perform general purpose model binning with automatic selection, can export models and model parameters to other hierarchies without requiring an additional hierarchy in the model name, can allow sharing of exported parameterized models by devices or components that are not within the inline subcircuit definition and can modify or create outputs for models by redefining or hiding existing outputs or creating new outputs.

6493849, Dec 10, 2002

Sep 5, 2000

09/654972

Ricardo Telichevesky - San Jose CA
Kenneth S. Kundert - Los Altos CA
Jacob K. White - Belmont MA

Cadence Design Systems, Inc. - San Jose CA

G06F 1750

716 4, 716 1

An efficient method for determining the periodic steady state response of a circuit driven by a periodic signal, the method including the steps of 1) using a shooting method to form a non-linear system of equations for initial conditions of the circuit that directly result in the periodic steady state response; 2) solving the non-linear system via a Newton iterative method, where each iteration of the Newton method involves solution of a respective linear system of equations; and 3) for each iteration of the Newton method, solving the respective linear system of equations associated with the iteration of the Newton method via an iterative technique. The iterative technique may be a matrix-implicit application of a Krylov subspace technique, resulting in a computational cost that grows approximately in a linear fashion with the number of nodes in the circuit.

6636839, Oct 21, 2003

Sep 5, 2000

09/654685

Ricardo Telichevesky - San Jose CA
Kenneth S. Kundert - Los Altos CA
Jacob K. White - Belmont MA

Cadence Design Systems, Inc. - San Jose CA

G06F 1750

706 1, 703 4

An efficient method for determining the periodic steady state response of a circuit driven by a periodic signal, the method including the steps of 1) using a shooting method to form a non-linear system of equations for initial conditions of the circuit that directly result in the periodic steady state response; 2) solving the non-linear system via a Newton iterative method, where each iteration of the Newton method involves solution of a respective linear system of equations; and 3) for each iteration of the Newton method, solving the respective linear system of equations associated with the iteration of the Newton method via an iterative technique. The iterative technique may be a matrix-implicit application of a Krylov subspace technique, resulting in a computational cost that grows approximately in a linear fashion with the number of nodes in the circuit.

7493240, Feb 17, 2009

May 15, 2000

09/570709

Dan Feng - Los Altos CA, US
Joel R. Phillips - Sunnyvale CA, US
Kenneth Kundert - Los Altos CA, US

Cadence Design Systems, Inc. - San Jose CA

G06F 17/10

703 2, 703 14, 703 41, 716 1, 716 6, 716 4

Described is a process for performing an improved mixed frequency-time algorithm to simulate responses of a circuit that receives a periodic sample signal and at least one information signal. The process selects a set of evenly spaced distinct time points and a set of reference time points. Each of the reference points is associated with a distinct time point, and a reference time point is a signal period away from its respective distinct time point. The process finds a first set of relationships between the values at the distinct time points and the values at the reference time points. The process also finds a second set of relationships between the values at the distinct time points and the values at the reference time points. The process then combines the first and second sets of relationships to establish a system of nonlinear equations in terms of the values at the distinct time points only. By solving the system of nonlinear equations, the process finds simulated responses of the circuit in time domain.

7574342, Aug 11, 2009

Oct 21, 2005

11/255903

Kenneth S. Kundert - Los Altos CA, US

Cadence Design Systems, Inc. - San Jose CA

G06F 17/50

703 13

A method is provided for compiling a model for use in a simulation, the method comprising receiving a description of the model; and automatically converting the description into an implementation of the model that is customized for a selected analysis during simulation.

7822590, Oct 26, 2010

Dec 17, 2003

10/739878

Kenneth S. Kundert - Los Altos CA, US

Cadence Design Systems, Inc. - San Jose CA

G06F 17/50

703 14, 345581

A system and method for performing circuit simulation is described. Revisions and history of the operating parameters of circuit designs subject to simulation are tracked. Mechanisms are provided that allow for viewing, measurement or other manipulation of signals at specific locations in a circuit design for simulation, such as parameters that include observation points which are implemented using probes. One approach to executing a measurement is via a controllable and flexible control statement, which in one embodiment is the “run” statement. Improved interfaces for viewing, controlling, and manipulating simulations and simulation results are also provided.

7827017, Nov 2, 2010

Dec 17, 2003

10/740372

Kenneth S. Kundert - Los Altos CA, US

Cadence Design Systems, Inc. - San Jose CA

G06F 17/50
G06F 9/45
G06F 11/00

703 14, 703 13, 703 15, 703 16, 703 22, 714 30, 714 31, 714 32, 714 34, 714739, 716 2, 716 4, 716 5, 716 6

A system and method for performing circuit simulation is described. The present approach provides methods and systems that create reusable and independent measurements for use with circuit simulators. Also disclosed are parallelizable measurements having looping constructs that can be run without interference between parallel iterations. Reusability is enhanced by having parameterized measurements. Revisions and history of the operating parameters of circuit designs subject to simulation are tracked. Mechanisms are provided that allow for viewing, measurement or other manipulation of signals at specific locations in a circuit design for simulation, such as parameters that include observation points which are implemented using probes. One approach to executing a measurement is via a controllable and flexible control statement, which in one embodiment is the “run” statement. Improved interfaces for viewing, controlling, and manipulating simulations and simulation results are also provided.

8195440, Jun 5, 2012

Feb 17, 2009

12/372608

Dan Feng - Los Altos CA, US
Joel R. Phillips - Sunnyvale CA, US
Kenneth Kundert - Los Altos CA, US

Cadence Design Systems, Inc. - San Jose CA

G06F 17/50

703 14

Described is a process for performing an improved mixed frequency-time algorithm to simulate responses of a circuit that receives a periodic sample signal and at least one information signal. The process selects a set of evenly spaced distinct time points and a set of reference time points. Each of the reference points is associated with a distinct time point, and a reference time point is a signal period away from its respective distinct time point. The process finds a first set of relationships between the values at the distinct time points and the values the reference time points. The process also finds a second set of relationships between the values at the distinct time points and the values at the reference time points. The process then combines the first and second sets of relationships to establish a system of nonlinear equations in terms of the values at the distinct time points only. By solving the system of nonlinear equations, the process finds simulated responses of the circuit in time domain.