Noise Reduction in AC-Coupled Amplifiers

  title={Noise Reduction in AC-Coupled Amplifiers},
  author={Ernesto Serrano-Finetti and Ramon Pall{\`a}s-Areny},
  journal={IEEE Transactions on Instrumentation and Measurement},
AC-coupled amplifiers are noisier than dc-coupled amplifiers because of the thermal noise of the resistor(s) in the ac-coupling network and the increased contribution of the amplifier input noise current in. Both contributions, however, diminish if the corner frequency fc of the high-pass filter observed by the signal is lowered, the cost being a longer… CONTINUE READING