To Simplify Or Not To Simplify? Take Care When Using Math Tools For Circuit Analysis
by Gregory Mirsky, Continental Automotive Systems, Deer Park, Ill. , How2Power Today, Mar 21 2018
Focus:
Occasionally when designing control systems we encounter situations where different
mathematical transfer function representations of the same system may produce dramatically
different results. For example, we obtain a control loop frequency response that can be
mathematically described by two formulas, one of which is a simplified version produced by math
analysis software, but the graphical interpretations of these functions are different. For
example, there is a big class of circuits called non-minimum-phase circuits, which have a
phase-frequency response that is not minimal for a corresponding amplitude response. Circuits
with the right-half-plane zero (RHPZ) belong to this class of circuits and in this article, the
author uses one of these circuits to highlight the pitfalls of using a math tool to analyze a
circuit transfer function.
What you’ll learn:
- How to understand some pitfalls of using math software to analyze transfer functions
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