Designs

[jim whitby]

Somebody neds to post a design... so here's one!

Loading Image...
--
Jim Whitby


Uniforms only come in two sizes, too small and too large
-- Murphy's Bush Fire Brigade Laws n°6
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Mageia release 9 (Official) for x86_64
6.6.28-server-1.mga9
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[john larkin]

On Wed, 8 May 2024 20:10:48 -0000 (UTC), jim whitby

Post by jim whitby
Somebody neds to post a design... so here's one!
https://imgs.xkcd.com/comics/circuit_diagram.png

Loading Image...

[Edward Rawde]

Post by john larkin
On Wed, 8 May 2024 20:10:48 -0000 (UTC), jim whitby

Post by jim whitby
Somebody neds to post a design... so here's one!
https://imgs.xkcd.com/comics/circuit_diagram.png

https://www.dropbox.com/s/w8px8z9mf64wpc9/HVamp.JPG?raw=1

Reminds me of audio amps which used an op amp's supply pins for the upper
and lower drive.

[John Larkin]

On Wed, 8 May 2024 21:30:38 -0400, "Edward Rawde"

Post by Edward Rawde

Post by john larkin
On Wed, 8 May 2024 20:10:48 -0000 (UTC), jim whitby

Post by jim whitby
Somebody neds to post a design... so here's one!
https://imgs.xkcd.com/comics/circuit_diagram.png

https://www.dropbox.com/s/w8px8z9mf64wpc9/HVamp.JPG?raw=1

Reminds me of audio amps which used an op amp's supply pins for the upper
and lower drive.

You can cascode them too. Build a class-B amp with zero crossover
distortion.

[Phil Hobbs]

Post by Edward Rawde

Post by john larkin
On Wed, 8 May 2024 20:10:48 -0000 (UTC), jim whitby

Post by jim whitby
Somebody neds to post a design... so here's one!
https://imgs.xkcd.com/comics/circuit_diagram.png

https://www.dropbox.com/s/w8px8z9mf64wpc9/HVamp.JPG?raw=1

Reminds me of audio amps which used an op amp's supply pins for the upper
and lower drive.

That’s a pretty mainstream technique actually. It’s a lot easier to
stabilize if the op amp has good supply rejection—lots don’t, especially on
the negative side.

In the last dozen years or so, AD and TI have come out with a lot of great
36V op amps, but for several years before that, they were dropping lots of
good old HV parts such as the LF357 and AD743 , and only introducing 5-V
ones. Using the supply pins to drive a Class B output stage lets you use
LV parts for higher-voltage applications.

Cheers

Phil Hobbs