Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 23 Jun 2024 17:33:44 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: Schematic Symbols Date: Sun, 23 Jun 2024 10:33:45 -0700 Message-ID: References: User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 47 X-Trace: sv3-EN9j38+HXgrchNd4rTlWWcLzXh/+P8acP1Ri7x/lLt07k9xOAwt0hckTgz5tvip3ONVsPzmdnwjixBP!B3VjWPBKXUtrnBVInrP5Q426IM9WZ+/TZg1JcRgZHeBzK/CO5i7MevCvHHm52q36FXLNrwbtCunK!iNRSoA== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 2444 On Sun, 23 Jun 2024 16:53:44 -0000 (UTC), Cursitor Doom wrote: >Okay, let's see if anyone can disabuse me of my ignorance on this >matter... >In the HP service manuals for their equipment they use a few different >symbols in their block diagrams I'm not familiar with. I can't post images >right now but hopefully a description will suffice. > >The first one is a circle with a Greek capital sigma inside it. What's >that all about? Is it an integrator? A summing amplifier? What's the deal >here? Summer, adder. Might just be two resistors in real life. Check the real schematic. >Next up: a circle with a greek theta over 'f' implying some sort of >division. Is that a phase to frequency comparitor? >A circle with a single cycle of sine wave inside it: oscillator? Probably. Some sort of sine source. >Plane triangles with nothing inside them. Do they represent generic >amplifiers or buffers? >A circle with just a plane theta inside it. Any ideas? Phase shifter? >A circle divided into 4 equal slices like it's got a giant 'X' inside it. Multiplier. Two inputs and one output? >As per the previous one, but inside a square box. >A circle with a capital 'S' inside it. Stop sign. >A square box with two double-headed arrows inside it in a 'X' arrangement. > >That just about covers it. Any assistance would be most welcome! > >Your pal, > >CD