Newsgroups: comp.dsp Path: utzoo!utgpu!cunews!wilf From: wilf@sce.carleton.ca (Wilf Leblanc) Subject: Re: 180 deg phase shift Message-ID: 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 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)