Path: ...!local-3.nntp.ord.giganews.com!Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 23 Jun 2024 18:06:24 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: Schematic Symbols Date: Sun, 23 Jun 2024 11:06:24 -0700 Message-ID: <50pg7jpahnp1sqjcla49s909f45s4am2b4@4ax.com> References: User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 56 X-Trace: sv3-x9a+4/CIG8ntMez0zl2lJbx0HL3qEc6lOtYqwGTUuX2+z+v/dIkcTaHGUUB124TqZEMmYxw7ToqRo+X!B82Cr5PV/OszbEcxO6Msa1+SFMQFQRET2n7RIYw0IrROtW2fqbyRNaN7XBETUmz7LQm8Izog5/C3!ReJ+7Q== 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: 2814 On Sun, 23 Jun 2024 18:02:54 -0000 (UTC), Phil Hobbs wrote: >john larkin wrote: >> 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? > >Could be either. A buffer is an amplifier too. > >>> 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? > >Also a mixer, which of course is an approximate multiplier. >> >>> As per the previous one, but inside a square box. > >Probably an IC multiplier. > > >>> A circle with a capital 'S' inside it. >> >> Stop sign. > >Quadrature (cosine) source. ;) "ALL WAYS"