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From: wayne@hpfcso.HP.COM (Wayne Covington)
Newsgroups: sci.electronics
Subject: Re: 90 degree phase shift
Message-ID: <7480012@hpfcso.HP.COM>
Date: 19 Oct 90 15:51:25 GMT
References: <3899@osc.COM>
Organization: Hewlett-Packard, Fort Collins, CO, USA
Lines: 5

The original question seems to be pretty well answered, but if you need more
accuracy on the phase tolerance or a wider frequency range than provided by the
solutions mentioned so far, see the article by Allan Lloyd in Electronic Design
19, 13 September 1976.  His approach is fairly generic and will let you explore
design trade-offs.