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SPICE: Certainty for All Decisions
Design, validate, and verify the most advanced schematics.
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Simulation / Analysis for PCB Design
DIY Differential Oscilloscope Probe Project
Do you need a differential probe for your oscilloscope? Join Mark Harris designing a DIY differential probe, and exploring the advantages of using a differential probe for testing your circuit.
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Plated Through-Hole Vias in mmWave PCBs
Plated through-hole vias in mmWave PCBs can ruin signal integrity in your RF interconnects if not implemented properly. Learn how to size and place stitching vias in this article.
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How to Calculate a Virtual Array in MIMO Systems
RF and sensing systems that use MIMO functionality have some important design constraints concerning virtual antenna design and placement. In these systems, due to the need for finer resolution and higher transmit/receive gain, the trend has been to pack more antennas into an array for beamforming and the reception of low-level signals. There is a reason for this trend, and it relates to an important concept in antenna array systems. When
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Use the Best RF Design Software for High Frequency PCBs
What should you look for in your RF design software? Integratoin between schematic and PCB is the top need among RF engineers.
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What is an Eye Diagram?
An eye diagram tells you everything you need to know about the behavior of signals in a high-speed channel, as well as the channel’s response to repeated excitation.
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What is Hybrid Beamforming?
Beamforming is an important broadcast method that involves use of antenna arrays in a wireless system to transmit electromagnetic energy along a specific direction. More wireless systems are expanding their ability to handle multiple users (or targets) with beamforming and MIMO. This is already used in radar, WiFi, and in newer high-bandwidth communication systems (5G). For the systems designer, it is important to understand the layout
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High-Speed PCB Design Analysis: Simulations and Signal Integrity Checks
High speed PCB design analysis is an admittedly broad area, comprising basic calculations of important design details, as well as simulations to verify a PCB layout. Some important evaluations are performed in the schematic, or at the very beginning of a design when a layout is being planned. These analysis techniques also have different levels of difficulty or advancement, and they will sometimes require an external program to fully evaluate the
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Why Most Via Impedance Calculators Are Inaccurate
Via impedance calculators are only useful in the low frequency range, where impedance control is typically not needed.
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Buck Converter Simulation in Altium Designer
Are you designing a step-down switching power supply? It helps to perform a buck converter simulation during circuit design. Altium Designer makes it easy to perform a buck converter simulation directly from your schematic.
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Altium Support for PSpice® in the Mixed-Signal Circuit Simulator
Altium Designer supports PSpice models in the Mixed-Signal Circuit Simulator. See how you can implement PSpice models in Altium's simulation engine.
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The High-Reliability PCBA Design and Test Challenge
High-reliability PCBAs require careful design and analysis to ensure compliance with rigorous performance standards. Learn more about testing and evaluation of high-reliability PCBAs in this article.
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A Brief Study of Stubs on a PCIe Connector
Stubs are an important topic in high-speed PCB design, and there is a longstanding guideline that stubs should always be removed from all vias on high-speed digital interconnects. While stubs are bad for high-speed lines, they do not always need to be removed. What is more important is to predict the loss profile and frequencies, and to floorplan appropriately to try and prevent such losses. In this article, I’ll look at some simulation results
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Monte Carlo Analysis With Transfer Functions in Cascaded Circuits
Pro circuit designers don’t just work with components in parallel and series when they design circuits. One way to build circuits is with circuit networks, which will have input and output ports. What happens inside each network can be analyzed in the traditional way (SPICE, by hand, etc.), but what is important is that the network maps an input voltage/current pair to an output voltage and current pair. Mathematically, this is quantified with a
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How to Get 3-port S-parameters From a 2-port VNA Measurement
S-parameters are fundamental quantities in signal integrity, and an ability to understand them from measurement or analysis is very important. If you have a 3-port network, like a power divider or circulator, it may appear that you must use a 3-port VNA to measure these S-parameters. It is always acceptable to measure between two ports, but you need to know what exactly it is you are measuring. As it turns out, you can use a 2-port VNA
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Altium Designer: The Best Circuit Design Software
Altium Designer doesn't just include the best PCB layout tools, it is also a the best circuit design software for students, hobbyists, and professionals.
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Monte Carlo Simulation vs. Sensitivity Analysis: What’s the Difference?
SPICE gives you an alternative to Monte Carlo analysis so that you can understand circuit sensitivity to variations in parameters.
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The Basics of Monte Carlo in SPICE: Theory and Demo
Anytime you place a component in your PCB, it’s almost like you’re gambling. All components have tolerances, and some of these are very precise (resistors for instance), but others components can have very wide tolerances on their nominal values (e.g., wirewound inductors or ferrites). In the event the tolerances on these components become too large, how can you predict how these tolerances will affect your circuits? While you could calculate
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