+ Post New Thread
Results 1 to 2 of 2
  1. #1
    Newbie level 1
    Points: 143, Level: 1

    Join Date
    Mar 2012
    Location
    Warren, MI USA
    Posts
    1
    Helped
    0 / 0
    Points
    143
    Level
    1

    Filter circuit, PWM driven, Polyester or Ceramic Capacitors ??

    Here it is in a nutshell,
    I have an LC, filter circuit, being driven by a PWM @ 1Khz, the object of which is to filter the output to a variable DC value based on the duty cycle of the PWM.
    Should I chose a polyester cap or a ceramic cap for this circuit?

    Mr D.

    •   AltAdvertisment

        
       

  2. #2
    Advanced Member level 5
    Points: 25,337, Level: 38

    Join Date
    Dec 2010
    Location
    Southampton and holiday cottage in Wensleydale (UK)
    Posts
    4,863
    Helped
    1312 / 1312
    Points
    25,337
    Level
    38

    Re: Filter circuit, PWM driven, Polyester or Ceramic Capacitors ??

    Ceramic capacitors are cheap and nasty, they have a wide tolerance, bad temperature coefficient but are cheap and have low self inductance so they are suitable for very high frequencies.
    Frank



--[[ ]]--