Citation: |
Cao Xiaodong, Ni Weining, Yuan Ling, Hao Zhikun, Shi Yin. A Compact Direct Digital Frequency Synthesizer for the Rubidium Atomic Frequency Standard[J]. Journal of Semiconductors, 2008, 29(9): 1723-1728.
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Cao X D, Ni W N, Yuan L, Hao Z K, Shi Y. A Compact Direct Digital Frequency Synthesizer for the Rubidium Atomic Frequency Standard[J]. J. Semicond., 2008, 29(9): 1723.
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A Compact Direct Digital Frequency Synthesizer for the Rubidium Atomic Frequency Standard
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Abstract
A compact direct digital frequency synthesizer (DDFS) for system-on-chip implementation of the high precision rubidium atomic frequency standard is developed.For small chip size and low power consumption,the phase to sine mapping data is compressed using sine symmetry technique,sine-phase difference technique,quad line approximation technique,and quantization and error read only memory (QE-ROM) technique.The ROM size is reduced by 98% using these techniques.A compact DDFS chip with 32bit phase storage depth and a 10bit on-chip digital to analog converter has been successfully implemented using a standard 0.35μm CMOS process.The core area of the DDFS is 1.6mm2.It consumes 167mW at 3.3V,and its spurious free dynamic range is 61dB.-
Keywords:
- CMOS integrated circuit,
- DDFS,
- rubidium atomic frequency standard,
- SoC
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References
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Proportional views