An method, a computer readable medium and a system for an automated design of a controllable oscillator are provided, wherein the method includes: receiving a set of input data through an automated design procedure, wherein the set of input data includes an initial circuit description file and a criteria file, and the initial circuit description file records initial values of parameters of one or more components within the controllable oscillator; performing simulation according to the set of input data through the automated design procedure to generate a simulation result; and selectively modifying at least one parameter within the parameters of the one or more components according to the simulation result through the automated design procedure. In addition, in the process of modifying the at least one parameter, connection relationships of all components within the controllable oscillator are unchanged.

A simulation system and a method thereof are disclosed. In the simulation system, a system power transmission model, and analog current time-domain model and digital current time-domain model are connected to obtain power noise generated after a supply current is obtained; jitter time-domain information of each interface connection circuit model under the power noise is obtained based on transmission of a clock signal outputted from a phase lock loop, by a simulation program; next, a voltage step response of a voltage measurement point when a clock terminal of each interface connection circuit model receives an ideal signal, is simulated by the simulation program to generate a first voltage time-domain model; a system waveform is generated based on the jitter time-domain information of each interface connection circuit model under the power noise, the first voltage time-domain model and data transmission, thereby obtaining an eye diagram and time-domain jitter distribution.

A wind noise analyzer includes: an unsteady computational fluid dynamics calculation unit configured to execute an unsteady computational fluid dynamics simulation involving moving a structure model modeled on a structure, and calculate, for each of spatial nodes, an average flow velocity and an average vorticity over a predetermined time in a flow field inside the predetermined region, and then calculate, for each of the spatial nodes, a value based on an amplitude of a turbulent flow velocity inside the predetermined region, in an angular frequency band of interest; and a pressure source density calculation unit configured to calculate, based on the average flow velocity, the average vorticity, and the value based on the amplitude of the turbulent flow velocity, a pressure source density.

Disclosed is a method and apparatus that determines receiver capacitance values for a receiver cell from a multi-segment receiver capacitance model (C1Cn) model. Values for receiver capacitance are determined from a Composite Current Source for Noise (CCSN) model under conditions used to attain receiver capacitance values for the C1Cn model Difference values for the difference between the values from the CCSN model and from the C1Cn model are determined. Calibration factors are iteratively applied to parameters of the CCSN model to obtain a minimum difference value for difference between receiver capacitance values from the CCSN model and receiver capacitance values from the C1Cn model. Calibration factor values that result in the difference value being within an acceptable range are stored.

A computing device includes a memory storing instructions. The computing device also includes one or more processors coupled to the memory and configured to execute the instructions to perform operations including obtaining data specifying a wire to be routed; selecting a wire bundle as a candidate for routing the wire; determining bundle parameters; generating a transmission line model to determine an estimated effect of an electromagnetic disturbance on the wire bundle; performing a comparison of the estimated effect of the electromagnetic disturbance to an acceptance criterion; and generating output indicating whether, based on the comparison, a particular routing of the wire satisfies a design specification.

Systems, computer-implemented methods, and computer program products to facilitate generation of a visualization scheme of noise in a quantum circuit are provided. According to an embodiment, a system can comprise a processor that executes computer executable components stored in memory. The computer executable components can comprise a calculation component that can calculate a noise state of a layer in a quantum circuit. The computer executable components can further comprise a visualization component that can render a visual representation of the noise state at the layer in the quantum circuit.

A method of computer simulation is for evaluating the immunity characteristics of a device-under-test by use of a transmission line model that models a transmission line connected to the device-under-test. The method includes a characteristic change node at which parameters representing the transmission characteristics of the transmission line change midway.

An active sound design (ASD) tuning device and a method thereof may include an ASD device that generates a virtual engine sound for each vehicle situation and a control device that outputs a composite sound by correcting and synthesizing the virtual engine sound and an internal sound measured for each vehicle situation based on a binaural vehicle impulse response (BVIR).

Methods for analyzing electromigration (EM) in an integrated circuit (IC) are provided. A layout of the IC is obtained. A metal segment is selected from the layout according to a current simulation result of the IC. Two first vias are formed over and in contact with the metal segment in the layout. EM rule is kept on the metal segment when a distance between the two first vias is greater than a threshold distance. The EM rule is relaxed on the metal segment when the distance between the two first vias is less than or equal to the threshold distance.

This application provides a chip apparatus, including a die, a first bond pad, a second bond pad, and a first solder pad. The first bond pad and the second bond pad are disposed on an upper surface of the die. A first power module and a second power module are disposed in the die. The first power module is coupled to the first bond pad. The second power module is coupled to the second bond pad. The first solder pad is separately coupled to an external power supply of the chip apparatus, the first bond pad, and the second bond pad. According to the foregoing technical solution, isolation between different power modules is improved, and noise transmitted on a power supply path can be better filtered out. This improves power supply noise performance of the chip apparatus.