LIGO Document D1101124-v7

aLIGO LSC RF Photodetector Schematic

Document #:
Document type:
D - Drawings
Other Versions:
17 Dec 2020, 19:39
16 Nov 2012, 15:21
Schematic and PCB files for the general purpose low noise RF photodetector for ISC length sensing. A de-Q'd version is also used in the PSL. See the related documents section (T1200428) for a spreadsheet detailing the component values specific to each application.
Files in Document:
Other Files:
lsc rfpd
Notes and Changes:
Version 7 - In response to the single supply failure mechanism, 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.
Referenced by:

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