30 Oct '13, 8pm

Four tips to verify control loop design on @edncom

Four tips to verify control loop design on @edncom

Steve Sandler explains what every engineer should know about ‘non-invasive’ stability assessments. The non-invasive stability assessment is a method that uses an output impedance measurement to accurately determine stability without access to the control loop. The non-invasive stability assessment, whether performed as a physical test or with a circuit simulation, is a fast, simple, and inexpensive means to verify or optimize any control loop design. This measurement is useful in almost all systems, though especially in high-speed, instrumentation, and RF systems. Improving stability reduces noise in a system, allowing better SNR, dynamic range, clock jitter and many other performance characteristics to be enhanced. Issues related to noise can be very difficult to trace and fix. Non-invasive testing is sometimes the only way to single out and eliminate potential stability ...

Full article: http://www.edn.com/design/pc-board/4423589/How-to-verify-...

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