Transcription of Lockin Amplifier - MIT
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Lockin Amplifier - MIT
Liz Schell and Allan Sadun Project Report Lock in Amplifier Introduction A lock in Amplifier is an analog circuit that picks out and amplifies a particular frequency of oscillation and rejects the other frequencies. Lock in amplifiers are useful because they can extract very weak signals from noisy environments as long as the signal is at a precise and known frequency. We built a system that transmits audio by amplitude modulating light at a particular reference frequency. The receiving side then acts as a lock in Amplifier by demodulating at the reference frequency, so that we can extract the audio data. We will discuss the design choices that were made for this system during planning and construction, the performance that was achieved, and possible extensions of this project.
Lockin Amplifier Introduction A lockin amplifier is an analog circuit that picks out and amplifies a particular frequency of oscillation and rejects the other frequencies. Lockin amplifiers are useful because they can extract very weak signals from noisy environments as long as the signal is at a
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