Power Integrity Using ADS Book

Product Code: ADSBK

The need for Power Distribution Network (PDN) simulation is essential due to its impact on power rail compliance, signal integrity, and electro-magnetic interference (EMI). Evolutionary increases in data rates and edge speeds, coincident with decreasing power rail voltages put ever more pressure on power integrity and system engineers to maintain optimum system performance. Power integrity assurance requires end-to-end simulation including analog and power electronics, as well as, power-aware signal integrity simulation. This also includes details, such as control loop assessment, capacitor and inductor modeling, and DC IR drop including remote sense lines and Printed Circuit Board (PCB) effects. Keysight Technologies' Pathwave Advanced Design System (ADS), the world's leading Electronic Design Automation (EDA) software package, addresses analog, RF, microwave, high speed digital and power electronics applications, including PCB effects, in a single simulation environment. Pathwave ADS provides this much needed end-to-end capability including large signal, non-linear Harmonic Balance (HB) simulation.

The ADS Harmonic Balance simulator provides ultra-fast time domain and spectral content of switching power supply waveforms and power rail noise without the long simulation times or convergence issues typically associated with transient simulation. In "Power Integrity Using ADS", award-winning, internationally recognized power integrity guru, and Keysight Certified EDA expert, Steven M. Sandler and Anto K. Davis, share their simulation experience and workspaces to provide a quick and easy guide to best Power Integrity design practices and simulation techniques. Chapter 1 – An Introduction to ADS Keysight Technologies' PathWave® Advanced Design System ('ADS') provides a modular simulator environment for practical power integrity studies. This chapter is for those who are not familiar with ADS to get started on the basics. It contains only the basic features necessary for power integrity analysis used in this book. Sample Workspaces are provided. WORKSPACE DOWNLOAD Chapter 2 This simulation workspace utilizes schematic driven time domain simulations to design low noise power delivery networks (PDN). The design starts with a simple model of a power delivery network to verify the expected natural step response, forced sinusoidal and square wave responses. The model complexity is increased to add multiple resonances to represent the voltage regulator module (VRM), the PCB inductance with bulk capacitors, and the ceramic decoupling capacitors. An optimizer is then used to search for the maximum voltage noise or rogue wave excursion that can exist with the multiple resonances and a forced digital load pattern from a real world PDN. Chapter 3 The workspace has the following sections: How low fidelity RLC capacitor models over estimate the number of capacitors needed to reduce PDN ripple. How high fidelity models are measured with the 2-port shunt through method to give the best dynamic range for the data How to use measured data to create a high fidelity multi-element lumped model using tuning and an optimizer. Chapter 4 The Workspace contains two folders - "01_InductorModeling" and "02_FerriteBeadsModeling." Both the inductor and ferrite bead models use measured data to obtain the parameters. Sample measured data is available inside the folders "...\AEM_FERRITE_BEADS_wrkndatanInductorMeasuredDatan" and "...\AEM_FERRITE_BEADS_wrkndatanFerriteBeadsMeasuredDatan" Refer to [5, chapter7] for high-fidelity DC biased measurements. The ADS Optimizer is used to tunethe model parameters. A component (inductor or ferrite bead) model can be createdwith its measurement data and the procedure is explained in this chapter. Chapter 5 The workspace follows along with the examples in the video and has the following sections: A VRM Reference Design vs an Improved VRM Design that shows the goal of this workspace. Why it is important to have a flat PDN impedance design for the VRM A Voltage Mode vs Current Mode VRM simulation using state based averaged models VRM Error Amp Feedback Design: Shunt vs Series Exploring the impact of worst case fabrication tolerances on Voltage Mode vs Current Mode Combining a State-Based Average VRM model with a Switch Mode transient model for design exploration. Chapter 6 & 7 This workspace is used by Chapter 6 and Chapter 7. The state sp