Yes, the amplitude remains the same. However, the average voltage is different for different duty cycles. If you can generate 1V output with 10V PWM, the PWM duty cycle should be 10% (i.e. 10% of the period at 10V and 90% of the period at 0V).natasyaeva said:my question now is, the output is in PWM, but how it will range the voltage from 0-10 because the amplitude of the PWM is still same..
RC value depends only on the frequency of PWM. It doesn't depend on the duty cycle and output DC voltage. The RC constant of the low pass filter should be, 10 times the frequency of PWM or greater.natasyaeva said:what the value of R&C and delay to get 1 volt?
Suppose we have a square wave between 0 and 5V. In frequency domain it will have components at: DC (0 Hz), then fundamental frequency (the frequency of the square wave), then harmonics. Low pass filter attenuates the fundamental and harmonics leaving the DC practically intact.natasyaeva said:how low pass filter change square wave voltage to dc voltage.
What results are you actually getting? What is the frequency of the simulated square wave? What kind of filter are you simulating (type and component values)?natasyaeva said:i had try in simulation but dont get the result.
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