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In this paper, we describe low-noise clock system based on combination of the chip-scale atomic clock CSAC SA.45s and the low-noise OCXO. We introduce here a new approach of frequency comparison resolution enhancement, which is based on continuous dynamic phase shifting of the evaluated signal. We have efficiently utilized fine-resolution phase shifter, which is embedded in DCM (Digital Clock Manager)...
Utilization of the Chip Scale Atomic Clock (CSAC) today gives great potential for wide range of strategic systems requiring superior long-term frequency stability. Compared to CSAC, an OCXO has many drawbacks, e.g. it has larger long-term frequency instabilities (aging rate), longer warm-up time and higher power consumption. On the other hand, the main disadvantage of the CSAC is the higher phase...
In this paper we introduce long-term frequency stability improvement of Oven Controlled Crystal Oscillator (OCXO) using Chip Scale Atomic Clock (CSAC). Compared to OCXO, the main disadvantage of the CSAC is their higher phase noise; however the CSAC features with better long-term frequency stability, much lower power consumption and much faster warm-up.
In this paper we introduce enhanced low power clock system that is able to achieve frequency stability ±0.01 ppm over a wide temperature range, which is approximately 100 times better than the stability achievable with typical Temperature Compensated Crystal Oscillator (TCXO). The proposed clock system is based on Dual-Mode Crystal Oscillator (DMXO) and the Chip Scale Atomic Clock (CSAC). Power consumption...
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