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Entry  Tue Nov 5 16:47:19 2013, rana, Frogs, LSC, illegal power supply about to expire 20131023_222351.jpg
    Reply  Tue Nov 5 17:12:48 2013, Jenne, Frogs, LSC, illegal power supply about to expire 
    Reply  Wed Nov 6 14:47:41 2013, Steve, Frogs, LSC, Din connectors added at 1Y2 1Y2moreDinFuses.jpg
       Reply  Wed Nov 6 15:57:22 2013, Jenne, Update, LSC, Power Supply solution 
          Reply  Fri Nov 8 17:19:27 2013, Jenne, Update, LSC, New Broadband PD for POP 22/110 IMG_1255.JPG
             Reply  Sat Nov 9 10:25:43 2013, Koji, Update, LSC, New Broadband PD for POP 22/110 
                Reply  Tue Dec 17 14:06:59 2013, rana, Update, LSC, New Broadband PD for POP 22/110 POP22110sch.pdfPOP22110.pdf
    Reply  Thu Feb 26 16:37:21 2015, manasa, Frogs, LSC, RIP illegal power supply 
Message ID: 9481     Entry time: Tue Dec 17 14:06:59 2013     In reply to: 9363
Author: rana 
Type: Update 
Category: LSC 
Subject: New Broadband PD for POP 22/110 

 I looked at the BBPD design so that we could make a POP22/110. It looks like it will be easy (I hope).

 The first attachment shows the schematic with the RF notch modified to handle 55 MHz. As long as the capacitor in this notch can be kept to below 20 pF, it doesn't degrade the noise so much,

The second attachment shows the TF and input referred noise. We ought to be able to get 20 pA/rHz at the input to the first RF amplifier.

The LISO files are in the svn under liso/examples/aLIGO_BBPD/,

Later, if we have to notch more than just 55 MHz, we can add a notch between the 2 RF amplifiers as Koji has done for the REFL165.

Attachment 1: POP22110sch.pdf  97 kB  | Hide | Hide all
Attachment 2: POP22110.pdf  87 kB  | Hide | Hide all
POP22110.pdf POP22110.pdf
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