Reduce Amplifier Noise Peaking To Improve SNR

Many amplifiers exhibit an increase in voltage noise spectral density (NSD) as they approach the unity-gain crossover frequency. This noise peaking can cause your circuits to have 39% higher noise than you expected. This is especially troublesome in unity-gain circuits, also called buffer or voltage-follower applications. Such peaking occurs when the spot noise becomes greater than the noise floor of …