Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w01Mka8L024943 for ; Mon, 1 Jan 2018 23:46:37 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eW8lY-0005Hp-1K for rs_out_1@blacksheep.org; Mon, 01 Jan 2018 22:41:08 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eW8lW-0005Hg-VE for rsgb_lf_group@blacksheep.org; Mon, 01 Jan 2018 22:41:06 +0000 Received: from mail-wm0-x22d.google.com ([2a00:1450:400c:c09::22d]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eW8lR-0000jC-DD for rsgb_lf_group@blacksheep.org; Mon, 01 Jan 2018 22:41:05 +0000 Received: by mail-wm0-x22d.google.com with SMTP id y82so14293628wmg.1 for ; Mon, 01 Jan 2018 14:41:01 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=NdSe0eMjFh0ehpI3lo01Y7S00BlKni1c7mD3AbXDQvs=; b=bJEqsr30CCo1NWZACgMWz/ZZ8HV7451YGzCfKyEAFVpYAaGcj3KhhQxVCwIdPrWJAm kdbCMvBurMr/u6gnP8QuOhNvy/XHAr3pPehmc70665VvESwjQcMog86ej+87g6wjbRqQ NxNvqDetgXZ72VK2970hYUa5YrHebyNA1lOvDjRUeA1qHTeJ/h0a/8DezFn4SAoZk2fj ZN23eqg78rrVISTAQ4RFDbmeAQVcdVxbrAeAUZS2GtOzXiL5D+V7JN/85Ifd5GQboH4W hcDPoXkCwdcXCXBiZZaeCl3iyHPF1uebshqscbXi8uK0qdV6SbXVIhjW/s++n2ZihAR1 CbqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=NdSe0eMjFh0ehpI3lo01Y7S00BlKni1c7mD3AbXDQvs=; b=B+0eWQnZFQ438Wmhd4XjDjqEMZxmjOIbpJIByDVQTG7qe61v/43l8wRp3Xgy+7YKTN 4l0kknXtVw6dITPtYfIUbLNuu15AHQLJr/rbnH79APwHca1Whvj0cwSW0wWAlFtQ4qrR xuME/72x1gO1d479XRLWr3gNeokjbWE1cAgFc4DhkZDNLyVaiugwVJX47IMbsWD2IQJp N4EabxTpzLAoPdA2D7cC9MjrEOY372djF/YI1wYJU3vPUafDWtgN5kw/1qL98FCdJYtq qY8TOGMqTWXEfPXfpqs5YuT7EiwWvSSSxV19RECYeMehzJBse+yQMdyqxx31CsBR/uTI PELg== X-Gm-Message-State: AKGB3mJdpu0m6XnR35ri/BtbzZ/rfkFOPuQY61TjTUtsI9uPtkFlYxIx CEaTZkhHLcuDVnSKWzPDRZbZq1wm3jFdNFlthkw= X-Google-Smtp-Source: ACJfBoubD9jEhQsCqScPHIfdt9P3Jok4IR0JBtq69hBGYbpc6K7lC+10YRarkVHWxUGuxBnvYIl9D6ubGW879df0Drw= X-Received: by 10.80.187.99 with SMTP id y90mr58637293ede.154.1514846460069; Mon, 01 Jan 2018 14:41:00 -0800 (PST) MIME-Version: 1.0 Received: by 10.80.177.54 with HTTP; Mon, 1 Jan 2018 14:40:59 -0800 (PST) In-Reply-To: <170720643.20180101220228@gmail.com> References: <781825051.20180101212433@gmail.com> <160b3a9c7d1-171c-1d653@webjas-vad221.srv.aolmail.net> <170720643.20180101220228@gmail.com> From: Andy Talbot Date: Mon, 1 Jan 2018 22:40:59 +0000 Message-ID: To: rsgb_lf_group@blacksheep.org Cc: dead.fets@gmail.com X-Spam-Score: 1.0 (+) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: When I said bias half way, meant half way between the two logic threshold limits. Ie mid way between 1.3V (upper limit of guaranteed '0' and 2.4V (lower limit of guaranteed '1') so bias at 1.8V Not half the supply volts. [...] Content analysis details: (1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (andy.g4jnt[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.0 FREEMAIL_REPLY From and body contain different freemails X-Scan-Signature: 5934134de2d93cab1d5fc440b67de82f Subject: Re: LF: Si5351A syntehsiser able to fire a FET driver chip directly?? Content-Type: multipart/alternative; boundary="94eb2c19c638244a180561bead68" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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 --94eb2c19c638244a180561bead68 Content-Type: text/plain; charset="UTF-8" When I said bias half way, meant half way between the two logic threshold limits. Ie mid way between 1.3V (upper limit of guaranteed '0' and 2.4V (lower limit of guaranteed '1') so bias at 1.8V Not half the supply volts. Study the data sheets and calculate. Don't just play with components willy-nilly. Andy G4JNT On 1 January 2018 at 22:02, Chris Wilson wrote: > > > Hello Markus, > > I am now using an MCP1404 so I can delete the 5V regulator > > http://www.gatesgarth.com/MCP1404.pdf > > So am I ok using another pair of 15K to pins 2 and 4 up to pins 6 (12V > DC +)? Thanks, this is all rather academic, given the latest U3S > firmware allows direct output of two signals from the Si synthesizer > 180 degrees out of phase I just fancied seeing if I could reduce the > component count of an amp. (Just fancied fiddling....probably not a > good idea, but I need to learn ;)) Thanks Markus, happy > New Year to you! > > Monday, January 1, 2018, 9:38:56 PM, you wrote: > > >> Any ideas please? > > > As Andy said, bias half way: place another pair of 15k from the inputs > (Pins 12,10) to 5V (pin9). > > > 73, Markus > > > > > > > > -- > Best regards, > Chris mailto:dead.fets@gmail.com > > > --94eb2c19c638244a180561bead68 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
When I said bias half way, meant half way between the two = logic threshold limits.=C2=A0 Ie mid way between 1.3V (upper limit of guara= nteed '0' and 2.4V (lower limit of guaranteed '1')=C2=A0 so= bias at 1.8V

Not half the supply volts.

<= /div>
Study the data sheets and calculate.=C2=A0 Don't just play wi= th components willy-nilly.

Andy=C2=A0 G4JNT
<= div class=3D"gmail_extra">
On 1 January 2018 = at 22:02, Chris Wilson <dead.fets@gmail.com> wrote:


Hello Markus,

I am now using an MCP1404 so I can delete the 5V regulator

http://www.gatesgarth.com/MCP1404.pdf

So am I ok using another pair of 15K to pins 2 and 4 up to pins 6 (12V
DC=C2=A0 +)?=C2=A0 Thanks,=C2=A0 this=C2=A0 is=C2=A0 all=C2=A0 rather acade= mic, given the latest U3S
firmware=C2=A0 allows=C2=A0 direct output of two signals from the Si synthe= sizer
180 degrees out of phase I just fancied seeing if I could reduce the
component=C2=A0 =C2=A0count of an amp.=C2=A0 (Just fancied fiddling....prob= ably not a
good idea, but I need to learn ;))=C2=A0 Thanks Markus, happy
New Year to you!

Monday, January 1, 2018, 9:38:56 PM, you wrote:

>> Any ideas please?

> As Andy said, bias half way: place another pair of 15k from the inputs= (Pins 12,10) to 5V (pin9).

> 73, Markus







--
Best regards,
=C2=A0Chris=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 mailto:dead.fets@gmail.com



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