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What is Ultralow-Noise Chopper Amplifier For Seafloor E-Field Measurement about?

This article describes an ultralow-noise chopper amplifier designed for measuring extremely weak seafloor electric field (E-field) signals in the range of nanovolts to millivolts at low frequencies. The chopper amplifier achieves a voltage noise of 0.6 nV/√Hz at 1 Hz and 1.2 nV/√Hz at 0.001 Hz through the use of a modulator, transformer, AC amplifier, high-impedance module, demodulator, low-pass filter, and chopper clock generator. It has a fixed gain of 1500, input voltage range of 2.7 mVpp, power consumpt

Author

Y S

Language

EN