Article View: comp.dsp
Article #1757Re: 180 deg phase shift
From: Wilf Leblanc
Date: Wed, 08 May 1991 14:53
Date: Wed, 08 May 1991 14:53
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1217 bytes
todd@appmag.com (Todd Day) writes:
>%Well, sure, you all can say how easy it is, but you're stopping shy of the
>%hard part. Can't implement a transfer function without getting it into the
>%form of a difference equation! That's the challenge...
Want a difference equation ??
y(n) = -x(n)
>[...]
>First of all, 180 deg phase shift is not the same as simply inverting
>the signal. A phase shift implies a time delay of some sort.
Oh, it does does it ??
Does a transfer function H(z) = -1 imply a time delay ??
[...]
>--
>Todd Day | todd@appmag.com
--
Wilf LeBlanc, Carleton University, Systems & Comp. Eng. Ottawa, Canada, K1S 5B6
Internet: wilf@sce.carleton.ca UUCP: ...!uunet!mitel!cunews!sce!wilf
Oh, cruel fate! Why do you mock me so! (H. Simpson)
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Newsgroups: comp.dsp Path: arc1-ca.pugleaf.net!utzoo!utgpu!cunews!wilf From: wilf@sce.carleton.ca (Wilf Leblanc) Subject: Re: 180 deg phase shift Message-ID: <wilf.673714405@rigel.sce.carleton.ca> Sender: news@ccs.carleton.ca (news) Organization: Carleton University, Ottawa, Canada References: <1644@fs1.ee.ubc.ca> <1991May7.152409.3933@njitgw.njit.edu> <1991May8.022953.781@appmag.com> Date: 8 May 91 14:53:25 GMT