Digital lock-in amplifier for space rubidium atomic clock.

  title={Digital lock-in amplifier for space rubidium atomic clock.},
  author={Pratik Jain and Priyanka Priya and T. V. S. Ram and K. S. Parikh and Thejesh N. Bandi},
  journal={The Review of scientific instruments},
  volume={92 12},
In many low-noise applications, extracting information from the extremely noisy signal is required. This task can be accomplished by a lock-in amplifier if the frequency of the signal is known before detection. Error signal output from the physics package of the rubidium atomic clock (RbAC) is one of those noisy signals. A lock-in amplifier extracts the desired information from such a signal as the frequency of the error signal is known beforehand. The Space Applications Centre of the Indian… 
Advanced space rubidium atomic frequency standard for satellite navigation
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