The attack time constant is 1 ms and the decay time constant is 1
second, if I remember correctly

  Dave Cuthbert
  Micron Technology 


From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Robert
A. Macy
Sent: Tuesday, August 23, 2005 12:12 PM
To: Ken Javor
Cc: emc-p...@ieee.org
Subject: Re: quasi-peak detector question

I recall it more historically relates to the motion of a
needle display.  Kinda like a vu meter.  Don't remember
about the decay time.  

There is an analytical formula.  Alas, I can't find my
copy.  I think it came from some old HP app notes.  

You are right in that the most important is the rise time.
 

              - Robert -

On Tue, 23 Aug 2005 12:51:27 -0500
 Ken Javor <ken.ja...@emccompliance.com> wrote:
> The quasi-peak detector is characterized by a charging
> time constant and a
> discharge time constant.  If I want to analytically
> determine the transfer
> function of the detector for a given pulse duration and
> duty cycle, do I
> only need consider the charging time constant?  Is the
> discharge time just
> there to enable a recording device (plotter pen) adequate
> time to respond?
> 
> Thank you.
> 
> Ken Javor
> 


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