ikalogic
Member
Hello,
I am trying to build a circuit to convert a PWM signal into a DC voltage that correspond to the duty cycle of the PWM signal.
I am not sure how to chose the optimal values for R and C depending on the frequency. is there a relation i can use to approximately find suitable values for R and C
I found this page on wiki, i think my answer may reside inside..
but i can't find it! maybe you can :
https://en.wikipedia.org/wiki/RC_circuit#Time_domain_considerations
or maybe you can provide me with the info i need.. that would be very kind of you guys! a smal explanation would be a plus!
thx a lot
EDIT: After further readings on the web, maybe the right question to ask is: Do i have to build my RC circuit so that it's central frequency match the one of the PWM signal?
EDIT 2: No i think i am wrong, accoding to this page https://ontrak.net/pwm.htm the frequency of the PWM is much more important than the banpass frequency of the filter....
I am trying to build a circuit to convert a PWM signal into a DC voltage that correspond to the duty cycle of the PWM signal.
I am not sure how to chose the optimal values for R and C depending on the frequency. is there a relation i can use to approximately find suitable values for R and C
I found this page on wiki, i think my answer may reside inside..
https://en.wikipedia.org/wiki/RC_circuit#Time_domain_considerations
or maybe you can provide me with the info i need.. that would be very kind of you guys! a smal explanation would be a plus!
thx a lot
EDIT: After further readings on the web, maybe the right question to ask is: Do i have to build my RC circuit so that it's central frequency match the one of the PWM signal?
EDIT 2: No i think i am wrong, accoding to this page https://ontrak.net/pwm.htm the frequency of the PWM is much more important than the banpass frequency of the filter....
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