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Old 7th June 2010, 04:20 PM   #1
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Default Yet another I/V Stage & LPF for DACs

Hello all,

I am working on a new I/V design for myself and thought I would share it with the community and get some feedback.

I want this to be a universal so that it can accept Current or Voltage source. The second stage is a LPF which can be configured as Butterworth or Bessel.

Please provide your comments and suggestions.

I know there are a lot of IV - LPFs out there in the market... I wanted to build something on my own, hence this excercise.
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Last edited by unixdeveloper; 7th June 2010 at 04:36 PM.
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Old 8th June 2010, 02:28 PM   #2
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Default your design?

Hi, fellow... welcome to the DIYAudio forum...

I think most active people here are going into passive solution... not my case.

My new design for DAC is getting very same circuit you posted... it is in TI Datasheet for various DAC ICs... PCM1794A in my circuit.

I think Bessel approach would do enough as the cutting frequency stays away the 40KHz region... I'm doing it around 44KHz as data incomming DAC chip is 24/96.

I think there's no magic... just trading limits for ripple&attenuation&phase ...
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