The electromagnetism problems upon which we spent many hours laboring away on homework in college has a mathematical formulation originally developed by Maxwell, Lorentz, Gauss, Faraday and others. In their full forms, these formulas are partial differential equations that come in many versions – both differential and integral.… Read More
Silicon Measurement Data Gives Insights to Using Metal Fill With Inductors
Metal fill requirements for inductors are now a fact of life. Fill has long been seen as detrimental to device performance due to parasitic capacitance. The necessity of fill arises from the need to ensure planarization of dielectric layers by using chemical mechanical polishing. Without adequate fill, areas of the chip can suffer… Read More
Distributed RLCK Models for Transmission Lines in High Speed Applications
Design engineers frequently struggle with transmission line design and modeling. We can define a length of interconnect that contains more than 1/100th of a wavelength as a transmission line. This seems to be the breakpoint where distributed effects to start to become significant. To improve circuit performance these long … Read More
Effect of Inductance on Interconnect
In previous design generations interconnect could safely be modeled by extraction using just R and C values. Parasitics in interconnect are important because they can affect the operating frequency or phase error in circuits like VCO’s. The need to model parasitics properly in wires is just as applicable in PA’s, LNA’s and for… Read More
EM Solver and Visualization Essential for Device Design
In many designs, an on chip inductor is created as though it were simply a device with an L and a Q value. Of course this view would seem to make life simpler for designers and the tools they use. But in reality even a simple inductor is really a complex compound structure with many electromagnetic elements interacting in complex ways.… Read More
Tackling Circuit Level EM Analysis for RF, MMW and High Speed Analog Designs
Accuracy, ease of use and performance have always been paramount for electromagnetic analysis software. Historically, it has been hard to find all three of these qualities in one tool. The result is that many high speed analog and RF designers resort to using multiple, often overlapping, tools to get the job done.
Lorentz Solution… Read More
TSMC Threater Presentation: Lorentz Solution!
Lorentz Solution presented at TSMC’s DAC 2012 Open Innovation Platform Theater. The presenter was Lorentz Sales Director, Tom Simon. He presented what Lorentz calls its Electromagnetic Design and Analysis Platform. One of the main points of the talk was the cooperative work that Lorentz does with TSMC.