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Article #16111How to prevent feedback in a intercom ckt ???
From: William T. Dedula
Date: Mon, 04 Jan 1993 16:03
Date: Mon, 04 Jan 1993 16:03
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Hello All; I'm designing a multi-station, multi-channel intercom system which will utilize a headset-microphone combination at each station. Since one of my requirements is to allow BOTh the Headset, and the Microphone to be enabled at each station, I am told that I could have a problem with feedback. I intend to use Low-Cost Power Amplifier IC's as well as 741 Op Amps. I'd like to get some ideas from the net of ways that this feedback problem can be greatly minimized, or eliminated. Is there any special way the circuit can be designed, or is there any special type of headset or microphone which could be used, etc ... Thank You very much !!! Tim W. Tim Dedula Internet: N.A.S.A. Lewis Research Center tdedula@nasamail.nasa.gov Mail Stop 77-3 tidedu@mars.lerc.nasa.gov 21000 BrookPark Road aa252@cleveland.freenet.edu Cleveland, Ohio 44135 Phone (216) 433-3668 The National Aeronautics and Space Administration: Science and Technology ... for the Benefit of ALL Mankind !!!
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arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!malgudi.oar.net!caen!spool.mu.edu!agate!ames!data.nas.nasa.gov!eagle!ariel.lerc.nasa.gov!tideduShow Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!malgudi.oar.net!caen!spool.mu.edu!agate!ames!data.nas.nasa.gov!eagle!ariel.lerc.nasa.gov!tidedu From: tidedu@ariel.lerc.nasa.gov (William T. Dedula) Subject: How to prevent feedback in a intercom ckt ??? Message-ID: <4JAN199311031444@ariel.lerc.nasa.gov> News-Software: VAX/VMS VNEWS 1.41 Sender: news@eagle.lerc.nasa.gov Nntp-Posting-Host: ariel.lerc.nasa.gov Organization: NASA Lewis Research Center Distribution: usa Date: 4 Jan 1993 11:03 EST Lines: 27