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Entry  Wed Apr 7 10:48:04 2010, Alberto, Update, Electronics, REFL11 Noise Simulation rfpd11_testinput_noiseplot.pdf
    Reply  Wed Apr 7 10:58:15 2010, Koji, Update, Electronics, REFL11 Noise Simulation 
       Reply  Wed Apr 7 11:11:19 2010, Alberto, Update, Electronics, REFL11 Noise Simulation rfpd11_testinput_noiseplot.pdf
Message ID: 2779     Entry time: Wed Apr 7 10:48:04 2010     Reply to this: 2780
Author: Alberto 
Type: Update 
Category: Electronics 
Subject: REFL11 Noise Simulation 
LISO simulations confirm the estimate of ~15nV for the noise of REFL11.
The largest contribution comes from the 50Ohm output resistor (Rs in the schematic below), the 450Ohm feedback resistor of the max4107 opamp stage; the 10KOhm resistor at the Test Input connector.
 
See attached plot.
 
(It's also all in the SVN, under https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/)
#
#                 gnd
#                 |
#                 Cw2
#                 |
#                 n23
#                 |
#                 Lw2
#                 |
#   gnd           n22
#   |             |
#   Rip           Rw2
#   |             |                   |\
#   nt- Rsi-n2- - - C2 - n3 -  - -  - |  \
#            |    |      |   |        |4106>-- n5 - Rs -- no                                                            
# iinput    Rd   L1     L2 R24    n6- |  /     |           |
#    |- nin- |    |      |   |    |   |/       |         Rload
#           Cd   n7     R22 gnd   |            |           |
#            |    |      |        | - - - R8 - -          gnd
#           gnd  R1     gnd      R7
#                 |               |
#                gnd             gnd
#
#
#
Attachment 1: rfpd11_testinput_noiseplot.pdf  35 kB  | Show | Show all
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