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A direct digital frequency synthesizer with high-speed current-steering DAC |
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| Authors: | Yu Jinshan Fu Dongbing Li Ruzhang Yao Yafeng Yan Gang Liu Jun Zhang Ruitao Yu Zhou Li Tun |
| Affiliation: | 1. National Laboratory of Analog IC's, Chongqing 400060, China;Sichuan Institute of Solid State Circuits, Chongqing 400060, China;School of Computer Science, National University of Defense Technology, Changsha 410073, China 2. National Laboratory of Analog IC's, Chongqing 400060, China;Sichuan Institute of Solid State Circuits, Chongqing 400060, China 3. School of Computer Science, National University of Defense Technology, Changsha 410073, China |
| Abstract: | A high-speed SiGe BiCMOS direct digital frequency synthesizer (DDS) is presented. The design in tegrates a high-speed digital DDS core, a high-speed differential current-steering mode 10-bit D/A converter, a serial/parallel interface, and clock control logic. The DDS design is processed in 0.35 μm SiGe BiCMOS standard process technology and worked at 1 GHz system frequency. The measured results show that the DDS is capable of generating a frequency-agile analog output sine wave up to 400+ MHz. |
| Keywords: | DDS CORDIC DAC current steering |
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