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- From: ssave@ole.cdac.com (The Devil Reincarnate)
- Subject: Re: Need Help with Op-Amps
- Message-ID: <1992Oct9.203417.246@ole.cdac.com>
- Organization: CDAC, WA
- References: <9988@ncrwat.Waterloo.NCR.COM>
- Date: Fri, 9 Oct 1992 20:34:17 GMT
- Lines: 30
-
- In article <9988@ncrwat.Waterloo.NCR.COM> tjgerman@53iss6.Waterloo.NCR.COM (Trevor German) writes:
- >
- >Re: steuer questions
- > [STUFF ABOUT OPAMP GAIN DELETED]
-
-
- I have a similar question about op-amps. This is what I want to do:
-
-
- I have an input sinusoidal signal. This will be of a real-time variable
- frequency. (That's the problem). What I want is an inverse of this signal
- that is exactly 180 deg. out of phase with it. If I pass it through an
- inverting amplifier, I will introduce a delay in the signal as I pass it
- through the circuitry. I can't live with this delay. Upto 2 deg.
-
- I need suggestions that will look at the output and input of the inverting
- amp. and delay the output so that the input and output are *EXACTLY* 180 deg.
- out of phase. I can't (don't want to) touch the input. Maybe someone has
- ideas of reeeeaaaal fast inverting amplifier designs, etc.
-
- It has to be instantaneous, some sort of feedback, without any degradation
- of the signals, ie. bucket brigade and charge storage is out. The freq. range
- is DC (ok, 1Hz) to 20 KHz.
-
-
- Any help will be appreciated.
-
- Thanks,
- Shailendra
- ssave@ole.cdac.com
-