2. (10 points) One use of PWM is to generate variable DC voltages. While the PWM signal is not DC, you should be able to
Posted: Sat Mar 19, 2022 6:11 pm
2. (10 points) One use of PWM is to generate variable DC voltages. While the PWM signal is not DC, you should be able to see from your results in part 1 that it has a DC component that depends on the duty cycle, D. If the voltage is applied to a system that is low pass in nature, it will respond to the DC component of the signal fpwm(t) A ... -T. DT. To Figure 2: A pulse width modulated signal. while being largely unaffected by the other frequency components. Assume the PWM signal is applied to the low-pass system represented by the frequency response function 1 H(W) = JWT +1 where the time constant T. Show that the sinusoidal steady-state output y(t) can be expressed as 00 Cn y(t) = C. + Σ cos [n wo t+ On – tan-'Won T)]. n=1 V vw, n T)2 +1