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3 ημέρες πριν · Explore the powerful Smith Chart as a tool for amplifier design. From understanding its fundamentals like impedance and reflection coefficient representation to implementing practical steps such as normalizing load impedances, choosing matching networks, and adding stability circuits, this guide will help you design amplifiers with optimal impedance matching and performance characteristics.
Inductance is the ability for an inductor to store induced electric energy as magnetic energy. An inductor must supply constant DC current to the output load while being driven by the switching input voltage. Table 4 shows the relationship between the current and the inductor’s voltage. Note that the voltage
world inductors, however, have parasitic resistance and capacitance that cause them to not be purely reactive ideal devices. Real inductors have a typical impedance versus signal frequency curve that looks like the figure below (for different inductance values): Figure 2: Typical impedance vs frequency cures for inductors
If you don’t have an LCR meter in your lab or you want to demonstrate the behavior of capacitors and inductors under sinusoidal stimulus, an oscilloscope and a function generator can help you to do a simple, transparent impedance measurement. You can expect capacitance and inductance values with 3%–6% uncertainty.
to measuring inductance, capacitance and impedance, it is not always easy to find an LCR meter. LCR meters operate by applying an AC voltage to the device under test (DUT) and measuring the resulting current, both in terms of amplitude and phase relative to the AC voltage signal. A capacitive impedance will have
The main difference between the inductive and the capacitive case is the phase 𝜑. In the inductive case, the phase is positive whereas the capacitive impedance has a negative phase.
inductance vs. frequency sweep for a particular coil. The normal inductance is indicated at both frequencies along with their tolerances. If this coil had been specified as a 5% inductor at the test frequency, it would have resulted in a 10% tolerance at the application frequency. These limits could have compressed over frequency or spread
