ADC border effect and suppression of quantization error in the digital dynamic measurement

Abstract

The digital measurement and processing is an important direction in the measurement and control field. The quantization error widely existing in the digital processing is always the decisive factor that restricts the development and applications of the digital technology. In this paper, we find that the stability of the digital quantization system is obviously better than the quantization resolution. The application of a border effect in the digital quantization can greatly improve the accuracy of digital processing. Its effective precision has nothing to do with the number of quantization bits, which is only related to the stability of the quantization system. The high precision measurement results obtained in the low level quantization system with high sampling rate have an important application value for the progress in the digital measurement and processing field.

Cold atom clocks and their applications in precision measurements*

“…Different from single ion optical clocks, optical lattice clocks usually have 10 3 -10 4 neutral atoms, thus a much lower instability (∼ 10 −16 or even lower) at 1 s can be achieved. [158] To date, optical lattice clocks have been realized based on the Sr, [159][160][161][162][163][164][165][166][167][168][169] Yb, [170][171][172][173][174][175][176] and Hg atoms. [177] The preparation of a quantum reference system includes laser cooling, optical lattice loading, and state preparing.…”