An 1.2GHz high-performance MUX-DDFS using quartet ROMs

作者：Hao Zhikun^*; Fang Zhi; Yuan Ling

来源：2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012, 2012-07-27 To 2012-07-29.

DOI：10.2991/iccasm.2012.217

• Analytical investigations
• Beneficial effects
• Chip sizes
• CMOS technology
• Current-steering D/A converter
• Direct digital frequency synthesizer
• High-speed
• Maximum operating frequency
• Mixed signal
• MUX-DDFS
• Spectral performance
• Spectral purity
• Terms-DDFS
• Working frequency

This paper presents a detailed description of a direct digital frequency synthesizer(DDFS) using optimized quartet ROMs. The quartet ROMs technology allows improving the system's working frequency with respect to controllable chip size and beneficial effects on system performances. Such a high-speed DDFS has been fabricated and characterized in 0.13 μ m CMOS technology and it produces a 12-bit outputs with a spectral purity of 53 dBc. Its maximum operating frequency is 1.2GHz by using six pipelining stages. Analytical investigation of spectral performances achievable by using dual-slope approximation and detailed description of high-speed flip-flops employed in 1.2GHz DDFS are also presented in this paper.

• 出版日期2012
• 单位清华大学