[sdiy] Becoming better at understanding difficult analog schematics
ben gebhardt
benjamin_gebhardt at yahoo.com
Thu May 16 15:17:08 CEST 2024
Not sure if mentioned already, but I learn alot by simulating circuits and then doing time and frequency domain analysis.
Agreed with redrawing circuits, this can help immensely.
And, finally, a basic thing I do when visually assessing a circuit I've never seen before is to think about the 2 extreme cases where the input signal frequency is 0 and +inf. Capacitors will open or short in those cases (with a transition point at some frequency in between) and that can reveal alot about what a circuit does. Maybe that's too elementary for this group, but I still do this all the time.
Ben
On Thursday, May 16, 2024 at 05:35:08 AM EDT, Mike Bryant via Synth-diy <synth-diy at synth-diy.org> wrote:
#yiv7691264512 P {margin-top:0;margin-bottom:0;}Oh boy do I remember the arguments at HP in the 70s when it was decided to add the dots and remove the jump-overs on schematics across the whole corporation.
From: Michael E Caloroso <mec.forumreader at gmail.com>
Sent: 16 May 2024 06:03
To: Mike Bryant <mbryant at futurehorizons.com>
Cc: Sarah Thompson <plodger at gmail.com>; ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics Not a good idea to recommend Buchla schematics for student level EEs. Buchla did not place dots on junctions. You'd have to have a solid foundation of circuits to decipher those.
MC
On Mon, May 13, 2024 at 8:16 AM Mike Bryant <mbryant at futurehorizons.com> wrote:
Those are exactly the types of circuits than production and test hate. Nice separate blocks with clearly defined inputs and outputs make their lives a lot easier. From: Sarah Thompson <plodger at gmail.com>
Sent: 13 May 2024 12:47
To: Mike Bryant <mbryant at futurehorizons.com>
Cc: Donald Tillman <don at till.com>; David G Dixon <dixon at mail.ubc.ca>; ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics Buchla schematics (at least the few I've seen) are fascinating. There is an incredible economy of design -- where many/most designers' circuits can easily be broken down into blocks that can be understood separately, with Buchla circuits you'll see a weird resistor or capacitor (or something) that doesn't make sense until you really dig into it, and it turns out that the designer has merged the functionality of blocks together, or added something analogous to a fixed tone control or something. Definitely from someone who liked to get their hands dirty at the bench!
On Mon, May 13, 2024 at 8:34 AM Mike Bryant <mbryant at futurehorizons.com> wrote:
Maybe that's the real difference between East Coast and West Coast synthesis :-)From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Donald Tillman <don at till.com>
Sent: 13 May 2024 08:20
To: David G Dixon <dixon at mail.ubc.ca>
Cc: ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics On May 12, 2024, at 10:43 PM, David G Dixon via Synth-diy <synth-diy at synth-diy.org> wrote:
>
> I hear you, Paulo! I have a very hard time reading some schematics. One good example are Buchla schematics, which I find almost impossible to decipher.
I got no problem with them, man. :-)
-- Don
--
Donald Tillman, Palo Alto, California
https://www.till.com
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From: Michael E Caloroso <mec.forumreader at gmail.com>
Sent: 16 May 2024 06:03
To: Mike Bryant <mbryant at futurehorizons.com>
Cc: Sarah Thompson <plodger at gmail.com>; ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics Not a good idea to recommend Buchla schematics for student level EEs. Buchla did not place dots on junctions. You'd have to have a solid foundation of circuits to decipher those.
MC
On Mon, May 13, 2024 at 8:16 AM Mike Bryant <mbryant at futurehorizons.com> wrote:
Those are exactly the types of circuits than production and test hate. Nice separate blocks with clearly defined inputs and outputs make their lives a lot easier. From: Sarah Thompson <plodger at gmail.com>
Sent: 13 May 2024 12:47
To: Mike Bryant <mbryant at futurehorizons.com>
Cc: Donald Tillman <don at till.com>; David G Dixon <dixon at mail.ubc.ca>; ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics Buchla schematics (at least the few I've seen) are fascinating. There is an incredible economy of design -- where many/most designers' circuits can easily be broken down into blocks that can be understood separately, with Buchla circuits you'll see a weird resistor or capacitor (or something) that doesn't make sense until you really dig into it, and it turns out that the designer has merged the functionality of blocks together, or added something analogous to a fixed tone control or something. Definitely from someone who liked to get their hands dirty at the bench!
On Mon, May 13, 2024 at 8:34 AM Mike Bryant <mbryant at futurehorizons.com> wrote:
Maybe that's the real difference between East Coast and West Coast synthesis :-)From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Donald Tillman <don at till.com>
Sent: 13 May 2024 08:20
To: David G Dixon <dixon at mail.ubc.ca>
Cc: ackolonges fds via Synth-diy <synth-diy at synth-diy.org>
Subject: Re: [sdiy] Becoming better at understanding difficult analog schematics On May 12, 2024, at 10:43 PM, David G Dixon via Synth-diy <synth-diy at synth-diy.org> wrote:
>
> I hear you, Paulo! I have a very hard time reading some schematics. One good example are Buchla schematics, which I find almost impossible to decipher.
I got no problem with them, man. :-)
-- Don
--
Donald Tillman, Palo Alto, California
https://www.till.com
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