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Log/Limiting amp use

Question asked by RFind on Nov 3, 2012
Latest reply on Nov 8, 2012 by jdobler

Hi,

there is a task: to amplify and to limit 1MHz signal with 100dB dynamic range and finally to get digital pulses (a comparator).

And minimal Phase distortions are required under wide temperature range.

 

I'm afraid, only the comparator use may give different phase distortions for small and large signals.

I suppose to use an input limiting amp or logarithmic amp.

 

ADL5304 has enough Dynamic Range, but 1.5MHz bandwidth.

And the difference in the phase distortions are expected between small and large signals.

Is it so?

 

If yes, may You advice me some IC which corresponds to my task better?

 

Best regards,

RFind

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