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AWR Analog Office - Application Notes

ANALOG OFFICE®

Application Notes and Design Examples

Analog Office Configure
This project will help new users to Analog Office configure the software for some settings that they will be more familiar with. These include the schematic and layout colors, the hotkeys, schematic wires behavior, units, and layout face defaults. This project will also discuss a method to generate a library of elements defined by the user.

Analog Office Extends HSPICE Transient Simulations to RF
Microwave Office, the Applied Wave Research (AWR) product for RF, microwave and millimeter-wave design, offers harmonic balance simulations to obtain steady state waveforms for port voltages and currents in microwave circuits. Design of many types of circuits such as oscillators, frequency dividers, and digital circuits with memory requires the ability to perform transient simulations. AWR's Analog Office (AO) offers this capability for RF and microwave circuits through integration with HSPICE 2003 from Synopsys...

BJT Amp Complete
This example is a part of AO Getting Started Guide.

BJT Amp OpPnt
This project shows the preliminary design of a differential amplifier, in order to demonstrate the DC operating point annotation and measurement in MWOffice and Analog Office.

CustomSpirals
It is easy to create your own custom spiral inductors within the AWR environment. The following simple steps show how to create the spiral element, characterise it and then use it in your project.

HierarchyResExample
The unified database used in the AWRDE contains much more connectivity information than other IC design tools normally would. In order to make the most of the advanced features of Analog Office, hierarchical connection in layout needs to be considered a little differently.

Modifed Gamma Probe (GPROBEM) Reference Paper
The modified gamma probe (GPROBEM) and gamma probe (GPROBE) elements are insertable elements that are placed on the input and output pins of active devices. When placed, they are invisible to the circuit so that the through signal path is not disturbed. They calculate the two reflection coefficients for the node into which they are inserted (Gamma 1 looks to the left and Gamma 2 looks to the right). The reflection coefficients themselves can be plotted, but the main thing to look at is the STAB_GPM measurement (with the GPROBEM element) and STAB_GP measurement (with the GPROBE element), which is the product of the two reflection coefficients. If this product is greater than 1 at any frequency or load / source pull point then the device is unstable. The biggest difference between the two probes is how they behave in circuits with feedback across the active devices that are being tested. As this example shows, the GPROBEM gives the correct answer, while the GPROBE does not. 

OpAmp
This project demonstrates the ability of Analog Office to perform full characterization of a high frequency operational amplifier in the Generic BiCMOS PDK. The project can be described as an automated spread-datasheet generator where many of the important amplifier figures-of-merit are determined over variations in temperature, power supply, process corners and load capacitor. The project highlights the power of the measurement driven design environment where design changes can be quickly re-characterized with the click of one icon.

P1dB User Defined Measurement
The first measurement shown in this project takes in two vectors, power in and power out and computes the 1 dB compression point. There are two cases, one where there is only a single frequency and one where there are multiple frequencies. The second measurement shown takes in one vector, power out and finds the value where the power saturates.

Standard Cells SPI
This project is intended to show the user how standard cells can be used within Analog Office. It should be noted that Analog Office is not intended to be used for multi-million gate digital synthesis but is a high frequency analog design tool which has limited digital capabilities and this use model reflects that.

Sweep Port Impedance

MWOffice and Analog Office do not allow the impedance of a PORT element to be swept using the SWPVAR block. This example shows alternatives for getting the measurements you need.

The Use of Temperature in Simulations
This application note discusses how to create projects that use temperature as a variable in Microwave Office (MWO) and Analog Office (AO) simulations.

XML Library Development Application Note
This application note shows one way of developing and managing vendor libraries for use in AWR products. The basic technique is to manage all of your library data in an Excel spreadsheet. We have developed a script that will take data entered in to Excel and generate an XML file for your library. The application note describes in detail the format of this Excel file...