Return-Path: Received: (qmail 89076 invoked from network); 14 Jan 2005 18:34:46 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore01.plus.net with SMTP; 14 Jan 2005 18:34:46 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CpWDG-000C7j-Vv for dave@picks.force9.co.uk; Fri, 14 Jan 2005 18:30:28 +0000 Received: from [192.168.67.3] (helo=ptb-mxcore03.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1Cp9P8-0003Qq-Vj for dave@picks.force9.co.uk; Thu, 13 Jan 2005 18:09:22 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1Cp9IX-000Ean-Ps for dave@picks.force9.co.uk; Thu, 13 Jan 2005 18:02:17 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Cp9Fb-0003Pe-1L for rs_out_1@blacksheep.org; Thu, 13 Jan 2005 17:59:15 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Cp9Fa-0003PV-MW for rsgb_lf_group@blacksheep.org; Thu, 13 Jan 2005 17:59:14 +0000 Received: from nibbel.kulnet.kuleuven.ac.be ([134.58.240.41]) by relay.thorcom.net with esmtp (Exim 4.43) id 1Cp9FX-0003Yh-8k for rsgb_lf_group@blacksheep.org; Thu, 13 Jan 2005 17:59:14 +0000 Received: from localhost (localhost [127.0.0.1]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id A725A4B9FF for ; Thu, 13 Jan 2005 18:58:56 +0100 (CET) Received: from octavianus.kulnet.kuleuven.ac.be (octavianus.kulnet.kuleuven.ac.be [134.58.240.71]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 4363C4BA56 for ; Thu, 13 Jan 2005 18:58:54 +0100 (CET) Received: from localhost (webmail2.cc.kuleuven.ac.be [134.58.242.4]) by octavianus.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 35D32AF096 for ; Thu, 13 Jan 2005 18:58:54 +0100 (CET) Received: from 82-147.243.81.adsl.skynet.be (82-147.243.81.adsl.skynet.be [81.243.147.82]) by webmail2.kuleuven.be (IMP) with HTTP for ; Thu, 13 Jan 2005 18:58:54 +0100 Message-ID: <1105639134.41e6b6de2ec9f@webmail2.kuleuven.be> Date: Thu, 13 Jan 2005 18:58:54 +0100 From: Rik Strobbe To: rsgb_lf_group@blacksheep.org References: <41E58B5D.6070700@freenet.de> <41E5A312.5040500@usa.net> <41E6AD88.6000903@freenet.de> In-Reply-To: <41E6AD88.6000903@freenet.de> MIME-Version: 1.0 User-Agent: Internet Messaging Program (IMP) 3.2-cvs X-Originating-IP: 81.243.147.82 X-Virus-Scanned: by KULeuven Antivirus Cluster X-SPF-Result: relay.thorcom.net: 134.58.240.41 is neither permitted nor denied by domain of fys.kuleuven.ac.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=failed,none Subject: Re: LF: Simple image-cancelling exciter for digimodes Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Filtered: by PlusNet SpamCORE (v3.00) Wolf, an easy way to get the 25% signals would be to use a Johnson counter (eg. CD4017). 73, Rik ON7YD Citeren Wolf DL4YHF : > Hello Alberto, > > Thanks for the point - and Ok about the reversed Tayloe detector : In > > fact, the circuit -as it is- is already quite similar. One difference > is > the duty cycle of the switching waveforms (if one would use a > fourfold > analog switch like the HC4066) for the "Tayloe": > For Tayloe switches, it would be 1 / 4 (each switch conducts 25 % of > > the whole cycle) > For the classic image cancelling mixer, the duty cycle is 1 / 2 (50 % > > conduction in the cycle). > Unfortunately the simple quadrature L.O. with two flipflops cannot be > > modified (without extra components) to produce the "Tayloe"- > switching > waveforms. > > Best greetings, > Wolf DL4YHF . > >