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From: jthornto@ee.ubc.ca (Johan Thornton)
Newsgroups: comp.dsp,sci.electronics
Subject: Re: 180 deg phase shift
Message-ID: <1655@fs1.ee.ubc.ca>
Date: 15 May 91 04:54:45 GMT
References: <1991May10.003817.5593@milton.u.washington.edu> <625@fudd.dataco.UUCP> <1991May15.031706.15559@bmerh2.bnr.ca>
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Organization: Electrical Engineering, University of BC
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In article <1991May15.031706.15559@bmerh2.bnr.ca> myhui@bnr.ca (Michael Hui) writes:
>Now for my comments, IMHO: inverting shifts all frequency components by pi
>degrees. 

Pi degrees?  Ok, that's easy, pi^2/180 radians.

>But the original question was to shift the phase of a signal by 180 degrees,
>which implicitly means to delay the signal by pi degrees as referred to its
>fundamental frequency.

This shouldn't be too difficult.  I just finished my thesis on a device that
delays a signal by 360 degrees with respect to its fundamental.  It was
pretty complicated, but your device should be about half as complicated.

-- 
Johan Thornton
(but my friends call me jthornto@ee.ubc.ca)