| Citation: |
Chen Gaopeng, Wu Danyu, Jin Zhi, Liu Xinyu. An ultra-high-speed direct digital frequency synthesizer implemented in GaAs HBT technology[J]. Journal of Semiconductors, 2010, 31(6): 065002. doi: 10.1088/1674-4926/31/6/065002
Chen G P, Wu D Y, Jin Z, Liu X Y. An ultra-high-speed direct digital frequency synthesizer implemented in GaAs HBT technology[J]. J. Semicond., 2010, 31(6): 065002. doi: 10.1088/1674-4926/31/6/065002.
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An ultra-high-speed direct digital frequency synthesizer implemented in GaAs HBT technology
doi: 10.1088/1674-4926/31/6/065002
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Abstract
This paper presents a 10-GHz 8-bit direct digital synthesizer (DDS) microwave monolithic integrated circuit implemented in 1 μm GaAs HBT technology. The DDS takes a double-edge-trigger (DET) 8-stage pipeline accumulator with sine-weighted DAC-based ROM-less architecture, which can maximize the utilization ratio of the GaAs HBT’s high-speed potential. With an output frequency up to 5 GHz, the DDS gives an average spurious free dynamic range of 23.24 dBc through the first Nyquist band, and consumes 2.4 W of DC power from a single –4.6 V DC supply. Using 1651 GaAs HBT transistors, the total area of the DDS chip is 2.4×2.0 mm2.-
Keywords:
- DDS,
- double-edge-trigger,
- CML,
- ECL,
- GaAs HBT,
- sine-weighted DAC
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References
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Proportional views
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