[sdiy] Eurorack Grounding Question

[Brian Willoughby]

I guess this explains why manufacturers are willing to go to the expense of mounting parts on the bottom of a board - just to ensure that the caps are as close to the power pins as possible. I'm speaking of surface mount, of course.

Brian

p.s. Did Texas Instruments buy ComLinear? There's an Application Report from TI about the ComLinear Corporation high bandwidth op-amps.


On Jan 2, 2021, at 22:04, Michael E Caloroso <mec.forumreader at gmail.com> wrote:
> My first job out of college was designing test programs and test
> fixtures for automated test equipment.
> 
> There was a stash of memory components that had failed test.  The
> original engineer could never resolve those failures.
> 
> When I examined the test fixture, I modified it by moving the bypass
> cap as close as possible to the device.  It was about a one centimeter
> move.
> 
> That cured the problem, and all the "failed" components now passed.
> The original engineer had trouble accepting that solution.  The
> program managers were more than happy to deliver those components
> regardless of his reservations.  These were for the military and I
> never heard any customer complaints.
> 
> My very first ATE assignment with that group was to design a test
> fixture for a buffer with a 1000V/us slew rate (NS LH0033).  The ATE
> couldn't generate a step that fast so I had to build a step generator
> on the fixture.  Wound up using a ComLinear CLC205 in comparator mode,
> still have one.
> 
> MC