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Subject: Re: log-antilog multiplier

Date: 01/06/03 at 6:09 PM
Posted by: xwindy
E-mail: min.xu@ic.ac.uk
Message Posted:

In Reply to: Re: log-antilog multiplier posted by Russ Kincaid on 01/06/03 at 3:58 PM:

The lock-in amplifier works like a phase comparator. The input of the multiplier is two signal have same frequence but different phase.
After the multiplier follows a low pass filter, which gives out an DC signal equals sin(phase)


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