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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: integrating a signal
Date: Sun, 19 Jan 2003 17:01:07 GMT
NNTP-Posting-Date: Sun, 19 Jan 2003 09:01:07 PST
> 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.
Your 2. is fine but because you have a variable duty cycle there is a DC
component whenever the high level time and the low level time are
unequal. The DC component will saturate the integrator. Depending on
what you want to accomplish, there are several solutions most of which
are very simple. You might be able to use just a simple RC network.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
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