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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id v23sm12922962wmh.30.2018.01.02.04.21.04 (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 02 Jan 2018 04:21:04 -0800 (PST) Date: Tue, 2 Jan 2018 12:21:03 +0000 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <1332221573.20180102122103@gmail.com> To: rsgb_lf_group@blacksheep.org In-Reply-To: References: <781825051.20180101212433@gmail.com> <160b3a9c7d1-171c-1d653@webjas-vad221.srv.aolmail.net> <170720643.20180101220228@gmail.com> MIME-Version: 1.0 X-Spam-Score: 0.0 (/) 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: Hello Andy, OK, understood, I did some calculations then checked them against an on-line calculator and get figures of 68K and 12K for the divider. If I retained the existing 15K to ground I might be able to use 82k as the other half? Or are these values too high for needed current flow? Thanks. This reply mistakenly went to you by direct e-mail as well, my mail client needs the Reply To: changing on this forum each time to go to the whole group, not sure why, sorry... [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dead.fets[at]gmail.com) 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: Re: LF: Si5351A syntehsiser able to fire a FET driver chip directly?? Content-Type: text/plain; charset=utf-8 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=PRIORITY_NO_NAME 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id w02CQH86027312 Hello Andy, OK, understood, I did some calculations then checked them against an on-line calculator and get figures of 68K and 12K for the divider. If I retained the existing 15K to ground I might be able to use 82k as the other half? Or are these values too high for needed current flow? Thanks. This reply mistakenly went to you by direct e-mail as well, my mail client needs the Reply To: changing on this forum each time to go to the whole group, not sure why, sorry... Monday, January 1, 2018, 10:40:59 PM, you wrote: > 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 -- Best regards, Chris mailto:dead.fets@gmail.com