stručni rad
Laboratory exercise for amplifier class B/AB for sophomore is described. In the first part, the influence of quiescent current and input signal amplitude on output signal waveform distortion and amplifier efficiency is examined. Output signal waveform is observed in time domain qualitatively and in frequency domain quantitatively. In second part, amplifier's output resistance is measured. In each measurement students have to reason out measurement results, the difference between measurement results and analytical results and measurement uncertainty. Students learn concepts of quiescent point, harmonic distortion, power, output resistance and measurement uncertainty by encompassing different areas of electrical engineering – electronics, circuit and signal analysis, power analysis and measurements.
class B/AB; quiescent current; harmonic distortion; power; output resistance; measurement uncertainty
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