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Electrical Engineering

Questions tagged [total-harmonic-distortion]

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I'm building some BJT amplifiers, and I'm currently getting distortion values via Multisim simulations. However, I'm not fully sure about the results I've been getting, and I would like to double ...
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1 vote
0 answers
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I'm working on a project involving multiple non-linear electrical loads, and I want to estimate the total THDi (Total Harmonic Distortion of Current) and, if ...
ED11's user avatar
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3 answers
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If I have a demodulated waveform obtained from an AM envelope detector and want to measure distortion using Total Harmonic Distortion (THD), is there a relevant standard for this? I found IEEE 519, ...
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How exactly does the value of the PWM-frequency of a 3-phase inverter contribute to the output voltage and current waveforms of the inverter? How can the choice of this frequency influence the output ...
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2 answers
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I see the assumption that the input AC voltage is clean (pure AC), in almost all PFC explanation articles. What if the input AC has some harmonics, say a voltage distortion factor of 10%, would it ...
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The known value of THD for a pure rectangular switching function, for which the duty ratio D = 0.5, is 0.483 or 48.3%. I have tried to back-calculate this using formulae for THD in order to work out ...
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I have been trying to create a set-up for measuring (estimating) the reported total harmonic distortion of an op-amp. (Please don't ask why I don't use a spectrum analyzer because I have been assigned ...
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In general, the equation to find the Total Harmonic Distortion (THD) is: \$THD = \frac{\sqrt{V_{2,rms}^2+V_{3,rms}^2+V_{4,rms}^2+V_{5,rms}^2+...}}{V_{1,rms}} \$ According to attached figure (A Course ...
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Using Charles Wenzel's "High Gain and Fidelity Audio Amplifier" (source:https://www.radiolocman.com/shem/schematics.html?di=335167) as my final project for my freshman year due this Saturday,...
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1 answer
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I'm trying to simulate a FWR - circuit with an RC-load. In doing so, I want to analyze the THD-value of the circuit. In the end, I've tried changing the FFT-points, increasing and decreasing the ...
Tanamas's user avatar
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1 answer
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I know that harmonic distortion is a problem for the power company because it influences the power factor, but what about me as an end user? In my situation I would use 9 drivers of 200W (230VAC/48VDC)...
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I'm trying to solve the VAS (voltage amplifier stage) loading distortion in a three-stage amplifier. Excluding the input stage (called IPS in the circuit below), here is represented a typical VAS ...
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1 answer
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I have designed a 2nd-order active Sallen-Key high-pass filter for use in an audio circuit. An LTspice schematic is shown below, where VDD is 5 V. I have also breadboarded the circuit using low ...
zigzidane's user avatar
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I'm having trouble finding an affordable low bandwidth analyzer solution for measuring audio spectrum performance (20KHz and below). Does anyone have a suggestion for buying (new / used) or building ...
Mitchell's user avatar
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3 votes
1 answer
344 views

I have a digitized sinewave, and want to determine the THD of this waveform. This is the equation I am familiar with for calculating THD: $$ THD=\frac{\sqrt{\sum_{n=2}^{\infty}V_{n_{rms}}^2}}{V_{fund_{...
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