Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!uunet!tut.cis.ohio-state.edu!sample.eng.ohio-state.edu!dupuie
From: dupuie@ee.eng.ohio-state.edu (Scott T. Dupuie)
Newsgroups: sci.electronics
Subject: Re: CMOS Analog Switches
Message-ID: <1991Mar6.214031.3045@ee.eng.ohio-state.edu>
Date: 6 Mar 91 21:40:31 GMT
References: <5292@umbc3.UMBC.EDU>
Sender: news@ee.eng.ohio-state.edu
Organization: The Ohio State University Dept of Electrical Engineering
Lines: 28
Nntp-Posting-Host: icarus.eng.ohio-state.edu

In article <5292@umbc3.UMBC.EDU> hack@umbc5.umbc.edu () writes:
>
>      I am tring to build a audio amplifier and I wish to have
>it electronically switched (as few mechanical switches as
>possible).  What I was concidering is using CMOS bilateral
>switches to handle this.  What I am concerned is they might
>produce a great deal of distortion to the signals.  Now I know
>that audio signals are typically 20-20kHz, still I don't know
>if that would be a problem.
>
>     I would like to know if there is a better way, or if
>the CMOS chips are right for the jobs which ones are better
>for this type of application.
>
>Thank you in advance,
>J. Hack

Several companies make special low distortion analog switches for
high fidelity audio applications. In particular, I know that Analog
Devices, Inc. and PMI (subsidiary of Analog Devices) both make these
kind of switches. Don't recall the part numbers off the top of my 
head. Try contacting your local sales rep. or distributer for more
info.

Scott T. Dupuie
Dept. of Electrical Engineering
The Ohio State University
dupuie@ee.eng.ohio-state.edu