Phase-Locked Amplifier with Sub-ppm Voltage Resolution Based on FPGA (Operating Frequency up to 6 MHz)
Abstract Digital phase-locked amplifiers are widely used in various scientific fields for high-resolution measurements. Experimental evidence shows that due to the additional 1/f noise observed at the output of the phase-locked amplifier, current state-of-the-art commercial models cannot measure signals with a resolution better than tens of ppm. This noise arises from low-frequency gain fluctuations experienced … Read more