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Anomalie #194

open

Noise from MOSFET/Shunt/Feedback in the control

Added by François Cerbelle over 4 years ago. Updated over 4 years ago.

Status:
Résolu
Priority:
Normal
Assignee:
-
Target version:
1.1
Start date:
07/02/2020
Due date:
% Done:

0%

Estimated time:
10:00 h

Description

Noise from the feedback becomes visible in the control circuit when strong enough. It is then amplified by the AOP, comes back to the feedback, and to the control, ...

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 #1

Updated by François Cerbelle over 4 years ago

Add a low-pass filter on the OpAmps N.I. pins to remove noise received from everywhere (including from the feedback) by the control circuit

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 #2

Updated by François Cerbelle over 4 years ago

  • Target version deleted (1.1)
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 #3

Updated by François Cerbelle over 4 years ago

  • Target version set to 1.1
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 #4

Updated by François Cerbelle over 4 years ago

  • Estimated time set to 10:00 h
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 #5

Updated by François Cerbelle over 4 years ago

The noise was probably due to the feedback amplification (0..0.075V to 0..5V). I switched the MOSFET driver and feedback to 0..075V Let's see in the next PCB batch

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 #6

Updated by François Cerbelle over 4 years ago

  • Status changed from Nouveau to Résolu
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