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- Newsgroups: sci.electronics
- Subject: Re: bandpass filter
- Message-ID: <1992Nov17.162517.4219@titan.ksc.nasa.gov>
- From: dlr@testeng.ksc.nasa.gov (Doug Reed)
- Date: 17 Nov 92 16:25:16 EST
- References: <1d3p0oINNlu3@moe.ksu.ksu.edu> <1d5lraINNp3f@moe.ksu.ksu.edu>
- Organization: Voice Systems Engineering, Kennedy Space Center
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- In article <1d5lraINNp3f@moe.ksu.ksu.edu> hampster@phys.ksu.edu (Kip J. Mussatt) writes:
- >In <1d3p0oINNlu3@moe.ksu.ksu.edu> hampster@phys.ksu.edu (Kip J. Mussatt) writes:
- >
- >>I am looking to make a high Q, low bandwidth filter, bw = Hz with
- >>a center frequency of 25 Hz. Burr-Brown makes some active filter
- >>chips, but they don't look too impressive, they are 16 pin and still
- >>require 4 external resistors. Each chip only produce a two-pole filter
- >>effect. I need to pass the 25+/-10 Hz signals and NOT pass at all
- >>any surrounding 10Hz or 60 Hz signals that are present in the line,
- >>if this helps. Does anyone know of any place /source of such a
- >>possible filter?
- >Just so this is clear, I don't want to process the signals via a uProc.
- >I'm looking for something that is very real time, since Im only looking
- >for the signals within a certain band, I don't really want to do spectral
- >analysis.
- >>-Kip J. Mussatt
-
- Kip:
- Check out TTE's active 3 pole Butterworth active filters. They seem
- that they might be just what you're looking for. Contact them at
- (213) 478-8224, Los Angeles. In their catalog vol. 34, check out page
- 5-5.
-
- Regards, Doug
-
- --
- +-----------+---------------------------------+--------------------------+
- | Doug Reed | HP3065AT Board Test Engineering | Kennedy Space Center, FL |
- +-----------+----+---------------------------++--------------------------+
- | Ham Call N4QVY | #include <std_disclaimer> | Lockheed Space Operations |
-