Ansys, Inc.

Sankar Ramachandran

Joao Moreno Geada

Scott Johnson

Qian Shen

Anusha Gummana

Norman H Chang

Ying-Shiun Li

Yaowei Jia

Hao Zhuang

Mathew Joseph Kaipanatu

Suresh Kumar Mantena

Ganesh Tsavatapalli

Rahul Rajan

Analysis of power supply noise in simulations of a design of a circuit can use per instance dynamic voltage drops (DVD) in timing analyses so that the simulated DVD values on a per victim cell basis can accurately guide the timing analysis on each victim instead of a global DVD for all victims during the timing analysis. In one embodiment, a method can: determine, during a power analysis simulation, a representation of an energy lost, during each switching window at each output of each victim cell, at one or more power supply rails of each of the victim cells in the set of victim cells due to aggressors in the design; and provide the representation of the energy lost separately for each victim cell to a timing analysis system. The representation can be a rectangle having a width defined by a switching window of a victim's output.

Dynamic voltage drop model for timing analysis

Example systems and methods are disclosed for performing a timing analysis on a circuit design. A plurality of switching scenarios are identified for the circuit design. One or more predictive models are applied to predict a subset of the plurality of switching scenarios that are likely to cause timing paths with critical timing problems. A dynamic voltage analysis is performed on timing paths based on the subset of switching scenarios. The one or more predictive models are applied to predict a set of critical timing paths based on the subset of switching scenarios that are likely to cause critical timing problems, the one or more predictive models taking into account the dynamic voltage analysis. A timing analysis is the performed on the set of critical timing paths.

Timing assistant for dynamic voltage drop impact on setup/hold constraints

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Bengaluru, India

Sankar Ramachandran