DCN for component changes to LSC Style RFPD

Document #:

LIGO-E1300114-x0

Document type:

E - Engineering documents

Abstract:

Details of the component changes to render this design insensitive to loss of a single power supply.

Files in Document:

None

Topics:

• Sensing and Control

Authors:

• Rich Abbott

Keywords:

DCN RFPD

Notes and Changes:

In response to the single supply failure mechanism intrinsic to this design, the following components were changed: U2 from AD8597 to LT1128, U8 & U10 from AD8675 to OP27, C31 removed to aid stability of LT1128. Reverse biased diodes are added across the main filter caps in the + and - 15VDC rails.

Related Documents:

• LIGO-D1101124-v7: aLIGO LSC RF Photodetector Schematic

Referenced by:

• LIGO-T1200334-v9: LSC RFPD Measured Parameter Datasheet Template