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Entry  Tue Mar 29 15:01:58 2011, Larisa Thorne, Update, Electronics, Low pass filter for X arm laser temperature control DSC_2889.JPGLPFgraph.pdf
    Reply  Tue Mar 29 15:50:21 2011, Koji, Update, Electronics, Low pass filter for X arm laser temperature control 
Message ID: 4456     Entry time: Tue Mar 29 15:01:58 2011     Reply to this: 4457
Author: Larisa Thorne 
Type: Update 
Category: Electronics 
Subject: Low pass filter for X arm laser temperature control 

 This is the continuation of http://nodus.ligo.caltech.edu:8080/40m/4402

 

The first picture is of the actual component, where the resistor is 1M and capacitor is 10uF. 

But before the component can be put into place, its transfer function had to be checked to make sure it was doing what we calculated it would do. The results of these are in the graphs generated: frequency vs. gain, and frequency vs. phase.

 

 

 

According to these graphs, we are not achieving the targeted cutoff frequency: need to recalculate and compensate for the extra 100k resistance being encountered.

Attachment 1: DSC_2889.JPG  1.299 MB  | Show | Hide all | Show all
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