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Subject: Re: integrating a signal(Slew Rate)
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Tue, 21 Jan 2003 05:38:41 GMT
NNTP-Posting-Date: Tue, 21 Jan 2003 00:38:41 EST
Why not use an RMS-DC converter? The RMS value of the signal should be a
decent metric to work with.
An AD637 might work (100 kHz might be a bit fast) and an AD8361 with an
external averaging cap will definitely work.
"Ashish" wrote in message
> Thanks for all the postings. What I really really want is an integral
> of the signal. However, to avoid problems I would settle for a signal
> with slew rate proportional to the square wave described.
> Now as the frequency of the signal is fixed at 100Khz and the duty
> cycle varies considerably I would prefer a solution with opamps rather
> than a simple RC to avoid issues with tolerances and leakage currents
> etc. However all ideas are welcome.
> Thanks Again
> > > Hi
> > >
> > > I have a bipolar fixed frequency square wave signal with varying duty
> > > cycle and magnitude. (D varies from 0.05-0.95 and magnitude +0.1-3.5V
> > > and -0.1 -3.5V).
> > > I need to integrate this signal.
> > >
> > > Can you please help me find a circuit to:
> > >
> > > 1. Integrate this signal. Without worrying about the constant of
> > > integration etc.
> > >
> > > 2. I might as well manage with a circuit which changes the slew rate
> > > of the input signal. So the Voutput has a slew rate proportional to
> > > Vinput where this constant of proportion can be designed. This may as
> > > well give a signal proportional to the integral of the signal.
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