AnsweredAssumed Answered

High pass filter

Question asked by cgth on Jan 25, 2004
Latest reply on Dec 13, 2006 by kkladopoulos
Hi,
Im very new to ADS (used cadence for 15 years...)
I need to insert a high pass filter (at baseband) in an simulation I copied from "examples".
1) Since I could not find a timed HP filter I made a new block wich
summed the BB signal minus a low pass filtered version of the BB signal. mathematically this is OK
but is this the way to do it in ptolemy?
2) I got warnings about having to long Tstep.
Changing the Tstep in FloatToTimed was not correct
since it seems to change tho whole sampling process for FFT etc.
So instead I UpSample of 4 before the filter and DownSampe by 4 after. Is this OK?
Will this UpSample be a zero order hold or a first order hold?
/CG  

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