Double edge modulation eliminates certain harmonics when the reference is a__________?
Correct answer: A. Sine wave
- A. Sine wave
- B. Square wave
- C. Triangular wave
- D. Trapezoidal wave
Explanation
With a sinusoidal reference, double-edge PWM produces symmetrical switching pulses, causing selected harmonic components to cancel. A square or triangular reference does not provide the same sinusoidal PWM harmonic cancellation pattern.
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