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Bug #1447

C14 is too far from LDO, causes oscillation

Added by laforge about 2 years ago. Updated about 2 years ago.

Status:
Closed
Priority:
High
Assignee:
Category:
SIMtrace hardware
Target version:
-
Start date:
Due date:
% Done:

0%

Spec Reference:

Description

The capacitor C14 is too distant from the LDO, whihc apparently causes oscillations in about a third of the devices.

One proven workaround is adding a 100nF capacitor close to the Vin pin of IC2 (LDO).

History

#1 Updated by tsaitgaist over 6 years ago

  • Status changed from New to Closed
  • Resolution set to fixed

corrected in v1.1
git 3b942695a9c68003e917948579e4c5e5f170d2d1
for v1.0 and v1.0p, manually add a 100nF capacitor near the LDO (IC2)

#2 Updated by laforge about 2 years ago

  • Project changed from OsmocomBB to SIMtrace
  • Category changed from 244 to SIMtrace hardware

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