This noise measurement amplifier, ATNMA2, is designed to test ultra-low noises, which cannot be measured by an oscilloscope, such as nanovolt or microvolt level noises, for
electronic modules. This amplifier measures the noise signals by touching the point that needs testing, then amplifies the detected noise signals, and selects the measured range of
frequencies. The rechargeable battery energy is 500mAH, and can be used for more than 20 hours. The rechargeable battery full voltage is 4.2V. The low noise amplifier includes
one rechargeable battery, one coaxial cable, and some probes. The maximum input DC voltage is 6.3V. If the voltage is large, partial voltage can be used.

The maximum input peak-to-peak AC (or noise) voltage is 3V/ (gain), e.g. gain= 3000 times, the maximum input noise is 3V/3000=1mV. The maximum output peak-peak is 3V.

Input impedance is 10k and the output impedance is <0.1Ω. The output is DC coupled.