ADS Overview

Uploaded by AgilentEEsof on 29.09.2011

In this video we show some of the capabilities that make Agilent’s advanced design system,
ADS, the most comprehensive, easy to use electronic design automation tool available for the design
of high-frequency and high-speed products.
It’s difficult in five minutes to describe 30 years of development of ADS into the tool
of choice that more than 20,000 designers use to make better communication products
faster, but let’s take a look at some of the major reasons.
ADS has a rich set of tools that help designers fully characterize, optimize, and produce
designs. The single integrated design environment uniquely provides circuit, EM, and system
simulators, along with schematic capture, post processing, layout, and verification
While ADS has the most comprehensive set of linear and non-linear simulators, simulation
is just one aspect of design. To help you create your product, ADS also offers a complete
multi-technology design flow including full featured RF and microwave layout, integrated
planar and full 3D EM simulation for increased accuracy, a large set of physical and device
models including X-Parameters and IBIS AMI models, statistical simulation methods for
improving yield, high-speed channel simulation for designs requiring increased data rates,
and a data display for powerful post processing.
Now we’ll take a look at ADS in action. First we’ll start with the front end of
the design flow including simulation, post processing, optimization, and statistical
analysis. Then we’ll look at the back end of the design flow including layout and verification.
It’s easy to create a schematic and run a simulation in ADS. Watch as I set up and
run an S-Parameter simulation and display the results. Templates and design guides help
you to easily set up simulations and displays for viewing data. Let’s tune one of the
parameters and see how the results are sensitive to the parameter value.
Next I’ll set up a non-linear simulation of an RF amplifier. Moving the marker on the
data display shows how the performance varies as a function of input power. Using the powerful
data display, you can learn much about your design’s performance by post processing
and analyzing the data without rerunning the simulation.
Once your initial design is done you can use ADS’ optimizers to further improve a design’s
nominal performance. Here is ADS’ optimization cockpit. This popular capability is unique
to ADS and makes the entire optimization process much simpler for the designer with a complete
dashboard at their fingertips.
In addition to nominal performance, it’s important to insure that your design has high
yields. Here’s a design that had poor yield. The spec calls for an output power greater
than 26 dBm for an input power of 2 dBm. ADS’ unique and easy to use statistical tools help
to pinpoint the problem. This yield sensitivity histogram shows that by keeping a capacitor
in the inner stage matching network below 7.6 picofarads, the yield can be dramatically
Now let’s turn our attention to layout. ADS offers a full featured layout tool for
you to generate an RF layout that is ready for production. With the largest number of
fully endorsed foundry design kits, ADS helps you layout your design in your foundry specific
process. Accurate modeling of interconnects or transmission lines is one of the most important
aspects of high-frequency and high-speed design.
ADS’ trace tool routes interconnects from one location to another, even moving between
layers and automatically inserting vias. It’s then very simple to convert the traces to
transmission line models for simulation. Artwork can also be imported from other layout tools,
and ADS’ natively integrated electromagnet simulators can be applied to the layout to
create accurate models for simulation.
This single interface for creating your layer stack up is used for both the 3D planar EM
simulator and the full 3D FEM simulator. The transmission line models and models from the
EM simulators can easily be combined in the schematic for RF or signal integrity simulation.
Here, for example, is a complete model of a PCI express channel. It combines EM and
transmission line models with IBIS AMI models. The eye diagram shows the performance at 5
gigabytes per second. ADS helps you to ensure that your designs will work at ever-increasing
data rates.
Let’s return now to our RF amplifier layout. To continue the design flow, a complete platform
requires designers to have natively built in DRC and LVS tools to ensure that their
design is ready for production. Here the fully embedded DRC tool shows that there are no
design rule violations. Similarly, the companion LVS tool shows that there are no discrepancies
between the layout and the schematic. So now you can send your design to the foundry and
be confident in its performance.
You may want to put your amplifier in a package or integrate it with multiple chips within
a module. Here’s the 3D view of an amp in its package placed on a PC board in the ADS
3D viewer. ADS allows you to combine and simulate circuits designed in multiple technologies
at both the circuit and the full 3D EM level. This is a unique capability of ADS. You may
also want to generate a model of your circuit that can be used at a higher level system
simulation. Agilent’s X-parameter innovation gives you the ability to generate a fully
non-linear X-parameter model in ADS that you can provide to colleagues or customers for
simulation while simultaneously protecting your IP. These are the same X-parameters that
you can measure with Agilent’s non-linear vector network analyzer.
In the last five minutes you’ve seen some of what makes ADS so popular with high-frequency
and high-speed designers. You’ve seen how ADS offers a complete multi-technology design
flow including layout and verification, integrated EM, and advanced models such as X-parameters.
And there’s still more. ADS is the most comprehensive, easy to use electronic design
automation tool available for the design of high-frequency and high-speed products. For
more information, please visit us at this website.