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From: robf@mcs213j.cs.umr.edu (Rob Fugina)
Newsgroups: sci.electronics
Subject: Re: Phone scrambler
Keywords: Phone scrambler
Message-ID: <2476@umriscc.isc.umr.edu>
Date: 24 Mar 91 20:11:17 GMT
References: <1991Mar23.215050.24738@sugar.hackercorp.com> <1991Mar24.012754.9816@athena.cs.uga.edu>
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In article <1991Mar24.012754.9816@athena.cs.uga.edu> mcovingt@athena.cs.uga.edu (Michael A. Covington) writes:
>    300-to-3000-Hz bandpass filter on input
>    Oscillator 5000 Hz or so
>    (no, make that 3500 Hz)
>    Doubly balanced mixer
>    300-to-3000-Hz bandpass filter again on output

What's a 'doubly balanced' mixer???

Rob  robf@cs.umr.edu  <--use this address!