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Lock in amplifier

  1. Mar 31, 2010 #1
    hi,
    I am interested to know how the lock in amplifier works?
    It is very commonly seen with oscilloscope, but I fail to grasp the idea behind it?
    I would appreciate any lecture notes or sites which give clear and precise understanding of it.


    Thanks
     
  2. jcsd
  3. Mar 31, 2010 #2

    mgb_phys

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    The principle of why it works/is used or the details of how the internal circuits achieve this?

    There is a good tutorial linked to form the wiki article http://www.bentham.co.uk/pdf/F225.pdf
     
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