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Signal Modulation
31 questions By Tony R. Kuphaldt
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Question 31 of 31
Pulse-density modulation (PDM) is closely related to pulse-width modulation (PWM). Describe the similarities and differences in your own words.
Reveal answerPWM is a truly analog modulation format, where PDM is truly digital. In other words, the resolution of PWM is infinite, whereas the resolution of PDM is finite.
Notes:It should be noted that either pulse stream may be converted into an analog voltage by low-pass filtering, which makes both of these modulation formats very useful.
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