PWM signwave with 50ns freq. Step

Question

Hi all,
i want to generate PWM step with 50ns. For this i have input signal.

PWM clock freq. = 24MHz.

if input is 3,25v then PWM freq = 1 µs (microsec)
if input is 0,5v then PWM freq = 250ns (nanosec).

pls share ur ideas for doing this task.

Regards
Max

michaelkellett · Answer

pls wrt n englsh bcs it wll B ezier 2 undrstnd

And it really does not take much longer.

When you are generating a PWM signal you need to consider two frequencies, the basic clock frequency of the generating system and the pulse frequency. If you need a resolution of 1% then you will need 100 basic clock periods per pulse, so with a 24MHz clock (41.66nS period) you could have a pulse frequency of 240kHz and the pulse widths could range from 4.118uS to 41.66nS. You can' get a 50nS step with a 24MHz clock.

How are you going to generate this PWM signal - if you are using a timer on a micro-controller then the data sheet or user manual will usually describe how to set it up for PWM.

MK

PWM signwave with 50ns freq. Step

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