Sigrity PowerSI

Sigrity PowerSI offers a quick and exact 3D full wave analysis of circuit boards and PC packages. With the results of this analysis problems in the domains of power integrity (PI), signal integrity (SI) and electromagnetic compatibility (EMC) can be controled. In the analyses numerous interpretations of electromagnetic couplings of wires and vias are available. An interpretation of the fluctuations of supply systems (power and ground) depending on e.g. simultaneous switching of the signals is an important point to guarantee the stability and the function of a circuit. Zones can be recognized in which the power supply is under or oversupplied.

With PowerSI frequency depending network parameter models can be extracted which enables to visualize understandingly complex coherences.

Sigrity PowerSI



  • Establishes power delivery system (PDS) guidelines for IC packages and boards
  • Evaluates electromagnetic coupling between geometries to enable better component, via, and decap placement
  • Extracts frequency-dependent S, Z, and Y parameters for package and board modeling for subsequent time domain SSN simulation
  • Anticipates energy leaks with near-field ration display
  • Assesses decoupling capacitor strategies and verifies placement effects
  • Performs what-if studies on potential design scenarios and stack-up options
  • Enables broadband modeling including accurate DC performance characterization (patent pending)
  • Integrates seamlessly with 3D solutions for IC packages and boards


  • Proven through use on thousands of production designs
  • Highly accurate, even for designs with unusual plane structures
  • Fast throughput with multi-processor support and options for distributed computing
  • Ability to support large designs that include both package and board structures
  • Flexible visualization options including 3D fly-through
  • Extensive user control of port selection and abstraction management
  • Strong HSPICE flow support
  • Optimized for flows with Cadence SiP Layout, Allegro Package Designer, and Allegro PCB Designer
  • Readily used in Mentor, Zuken, and Altium flows, accepting a mix of CAD databases where needed for multi-structure design support


Overview of the Allegro Sigrity Products:

Allegro Sigrity


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