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Signal, power integrity sol'ns for Keysight's ADS software

13 Jan 2016

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Keysight Technologies Inc. has introduced a couple of electromagnetic (EM) software solutions geared to assist signal integrity (SI) and power integrity (PI) engineers enhance high-speed link performance in PCB designs. The solutions, SIPro and PIPro, will be available in the latest release of Keysight EEsof EDA's Advanced Design System (ADS) software.

SIPro uses an innovative composite EM-technology that delivers high-frequency accuracy, together with the speed and capacity required for densely-routed cutting-edge PCB design, stated the company. When compared to gold-standard finite element method (FEM) simulations, SIPro demonstrates very good agreement at a small-fraction of the time and memory consumption, even above 20GHz.


SIPro: Nets selected for EM simulation

The PIPro solution is a collection of three PI-specific simulation engines for DC IR drop, AC power delivery network (PDN) impedance, and power plane resonances analysis. The DC IR drop simulator provides a table of DC voltages and currents for each via, pin, sink and voltage regulator module in the PDN, enabling SI/PI engineers to predict DC voltage at the pins of the ICs sinking the current. With the visualisation of voltages, current density and power dissipation on the power and ground nets, engineers can easily identify trouble-spots in the design. The AC PDN impedance analysis calculates the frequency dependency of the PDN with decoupling capacitors in place. With power plane resonance simulation, the self-resonant frequencies of the layout are identified and the electric and magnetic fields visualised to better understand where resonances are originating.

SIPro and PIPro solutions feature an analysis environment with a native 3D-viewer that enables designers to visually inspect nets prior to simulation and view post-processed field visualisations in 3D. The EM setup is completely net-driven, allowing designers to select only those nets they want to simulate, with no time or engineering effort required to manually edit or manipulate layout objects before simulation. With this workflow, designers can go from layout to results in less than 20 clicks.


PIPro: Visualisation of DC IR drop analysis, showing voltage distribution across a PDN

ADS's cohesive workflow for SI and PI design tasks automatically generates schematics to prepare EM models for immediate use with ADS' channel, DDR bus and transient simulators, noted the company. With these simulators, designers can conduct SI analyses (such as BER contour measurements) and complete their design verification with standard-specific compliance test benches. Also featured in ADS 2016 is a PAM-4 simulation capability that allows system designers to use PAM-4 IBIS-AMI models within the ADS Channel Simulator.

Keysight EDA's SIPro and PIPro solutions will be available in ADS 2016 and is scheduled for release in February.

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