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Why “mixed DC–AC” shows up everywhere Any real-world power rail, sensor node, or amplifier stage almost always carries a DC operating point (bias) plus an AC variation (signal or ripple). Think of: Analyzing those correctly (and fast) boils down…
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If you’ve ever flipped a switch in a circuit and watched a capacitor voltage creep up (or fall) on your scope, you’ve already met the classic RC charge/discharge curve. In this post, we’ll walk through what actually happens the…
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Why should you care? You tweak a load resistor (or an antenna, or a matching network) and suddenly your circuit delivers more real power than before—then it drops again. That peak is not an accident; it’s the maximum power…
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Why you should care about frequency response When someone says, “What does your system do at high frequency?” they’re really asking about frequency response. And the most compact, engineer-friendly way to see that response is the Bode plot: two…
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Understanding Transfer Functions: From Basics to Advanced Examples Transfer functions are a key concept in systems engineering, especially in control theory and signal processing. Whether you’re designing an amplifier circuit or a robotic arm, transfer functions help you understand…
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Mastering Circuit Analysis with Laplace Transforms Step by Step If you’ve ever found solving differential equations in circuits messy or slow, you’re not alone. The Laplace Transform is one of the most powerful tools electrical engineers use to simplify…
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Real and Reactive Power in 3-Phase AC Systems: A Practical Guide If you’re working with 3-phase power systems—whether you’re an engineer, technician, or student—understanding how to calculate real (active) and reactive power is essential. It’s not just about crunching…
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Line Voltage, Phase Voltage, and Line Current: Explained Simply If you’re diving into the world of 3-phase electrical systems, one of the first things you’ll hear about is the relationship between line voltage, phase voltage, and line current. It…