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Online active filter design tool
9 June 2010, Design Automation
Intersil has developed iSim Active Filter Designer for operational amplifier-based active filters.
This new online design tool (www.intersil.com/iSim) provides users with parts recommendations by delivering a ranked list of possible amplifiers that fit specific requirements considering supply voltages, signal swing limits and dynamic characteristics that are often overlooked in more basic tools. Implementation strategy is aided by component calculations which account for subtle amplifier and parasitic effects, improving the nominal filter accuracy and adding design margin.
iSim’s op amp macromodels include second order effects such as bandwidth vs. gain and loading, input-output impedance and I/O clipping, to ensure highly accurate simulations. These predict physical limitations online before committing to production. The tool gives designers the ability to view the interstage and final output, AC response, noise and step response, making it easy to see what is going on inside a multistage filter design and/or assess the impact of choosing alternate devices.
The tool enables an engineer to move from concept to design in four easy steps. First a user can match the right product from Intersil’s large portfolio of high-performance operational amplifier ICs to their design needs. Next, they can perform multiple simulations of a design online or locally using a personal computer. By comparing simulation results, a designer can quickly compare ‘what-if’ scenarios to determine the best product for their application. In step three, they can summarise, document and share designs with co-workers or customers. And finally a designer can download results to Intersil’s iSim PE (Personal Edition) tool for further analysis using a more general Spice simulator platform.
The tool currently offers low-pass filter designs from second through sixth order, and is being expanded to include high-pass and band-pass options. For more information contact EBV Electrolink, +27 (0)21 402 1940, capetown@ebv.com, www.ebv.com |
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