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From: John Woodgate
Subject: Re: Phase Detection Of Acoustic Frequencies
Date: Sun, 8 Dec 2002 19:35:16 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sun, 8 Dec 2002 21:19:29 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Dillion wrote
(in ) about 'Phase
Detection Of Acoustic Frequencies', on Sun, 8 Dec 2002:
>I am needing to detect the phase differences between 2 acoustic
>frequencies having displacements of 1 to several hz, in an overall
>bandwidth of 20hz-10khz. I have been told that a circuit based around
>the NE/SE567 IC might be what I need to use. I was curious if there is
>an off shelf inexpensive phase detector/amplifier that might
>accomplish this task? Something I can just go and purchase and get it
>over with. If not, can the NE/SE567 be used basically by itself, with
>just a power supply and the audio inputs & outputs going to/from the
>proper pins on the IC in a simple circuit board? If not, are there any
>kits out there that would get this done? Sorry for the dumb questions.
>I would appreciate any help I can get regarding this matter. Thank
The phase difference between signals of different frequencies is not
defined. You cannot do what you propose.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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