Path: csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail From: Christopher Howard Newsgroups: sci.electronics.design Subject: Signal pot dividing multiple signals Date: Mon, 16 Mar 2026 08:39:10 -0800 Organization: A noiseless patient Spider Lines: 23 Message-ID: <87h5qf685t.fsf@librehacker.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Date: Mon, 16 Mar 2026 16:39:11 +0000 (UTC) Injection-Info: dont-email.me; posting-host="6e24e2c52a9a9724ed2ccded4db142ff"; logging-data="2249862"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+0NZDEQakme5JK1hP2D4ALzMFMiXDO0VQ=" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:PVaZsYSPC14tPDvFTQt38PP6oho= sha1:PvaPAVXuw0ReNtZavs7umXaXVK4= Xref: csiph.com sci.electronics.design:741715 Hi, forgive me if there is some overlap with my previous thread about multipliers. But with my analog computer, a very common thing is to use a potentiometer for dividing (attenuating) an input signal, as opposed to having to setting up an expensive divider with a multiplier chip and an open amplifier. However, this approach is a bit awkward/wasteful in cases where you have multiple signals being divided by the same coefficient — for example, several forces being divided by the mass of the same object. So, I was wondering if I could come up with a little (analog) module that would attenuate multiple input signals based on the output from one pot, using a few inexpensive BJTs or whatnot. Does anyone have thoughts on what transistor configuration would be appropriate, or other helpful ideas? Regarding my last thread: I haven't had to puy together any hackish multiplier circuits yet, because a generous Usenet user mailed me some AD534 chips. I built one AD534 multiplier module that is basically just the AD534 plus a voltage buffer, and I might build a few more of those modules when I get around to it. -- Christopher Howard