40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  ATF eLog  Not logged in ELOG logo
Entry  Fri Aug 23 12:45:08 2019, Shalika Singh, Noise Budget, 2micronLasers, Noise Analysis of Circuit using SR785 Spectrum Analyser and Zero Simulation sallenkeyfilter.pdfbodeplot_sallenkey.pdfNoise_across_SallenKey.pdfsallen.zip
    Reply  Fri Aug 23 14:15:58 2019, Duo, Noise Budget, 2micronLasers, Noise Analysis of Circuit using SR785 Spectrum Analyser and Zero Simulation 
       Reply  Fri Aug 23 17:35:37 2019, Koji, Noise Budget, 2micronLasers, Noise Analysis of Circuit using SR785 Spectrum Analyser and Zero Simulation 
Message ID: 2407     Entry time: Fri Aug 23 12:45:08 2019     Reply to this: 2408
Author: Shalika Singh 
Type: Noise Budget 
Category: 2micronLasers 
Subject: Noise Analysis of Circuit using SR785 Spectrum Analyser and Zero Simulation 

The circuit has been soldered(refer entries 2399) and the noise for Sallen Key was analyzed

Attachment 1: Circuit Diagram of Sallen Key low pass filter( cut-off= 1Hz)

Attachment 2: Transfer Function of sallen key.  The Frequency response Measurement was done using the Swept Sine group. The input range was -50dBVpk.

Attachment 3: Noise comparison between zero and SR785 measurements. The noise matches the simulated results to a great extent and also it's less noisy so can successfully be used to bias the photodiodes(1V).

Attachment 4: Zip File

Attachment 1: sallenkeyfilter.pdf  239 kB  Uploaded Fri Aug 23 13:49:06 2019  | Hide | Hide all
sallenkeyfilter.pdf
Attachment 2: bodeplot_sallenkey.pdf  22 kB  Uploaded Tue Sep 3 11:59:32 2019  | Hide | Hide all
bodeplot_sallenkey.pdf
Attachment 3: Noise_across_SallenKey.pdf  48 kB  Uploaded Tue Sep 3 11:59:50 2019  | Hide | Hide all
Noise_across_SallenKey.pdf
Attachment 4: sallen.zip  662 kB  Uploaded Tue Sep 3 12:00:01 2019
ELOG V3.1.3-