Digital to analog converters(DAC)play an important role as a bridge connecting the analog world and the digital world.With the rapid development of wireless communication,wideband digital radar,and other emerging tech...Digital to analog converters(DAC)play an important role as a bridge connecting the analog world and the digital world.With the rapid development of wireless communication,wideband digital radar,and other emerging technologies,better performing high-speed high-resolution DACs are required.In those applications,signal bandwidth and high-frequency linearity often limited by data converters are the bottleneck of the system.This article reviews the state-of-the-art technologies of high-speed and high-resolution DACs reported in recent years.Comparisons are made between different architectures,circuit implementations and calibration techniques along with the figure of merit(FoM)results.展开更多
A 12-bit intrinsic accuracy digital-to-analog converter integrated into standard digital 0.18μm CMOS technology is proposed. It is based on a current steering segmented 6＋6 architecture and requires no calibration. ...A 12-bit intrinsic accuracy digital-to-analog converter integrated into standard digital 0.18μm CMOS technology is proposed. It is based on a current steering segmented 6＋6 architecture and requires no calibration. By dividing one most significant bit unary source into 16 elements located in 16 separated regions of the array, the linear gradient errors and quadratic errors can be averaged and eliminated effectively. A novel static performance testing method is proposed. The measured differential nonlinearity and integral nonlinearity are 0.42 and 0.39 least significant bit, respectively. For 12-bit resolution, the converter reaches an update rate of 100 MS/s. The chip operates from a single 1.8 V voltage supply, and the core die area is 0.28 mm^2.展开更多
A high-speed SiGe BiCMOS direct digital frequency synthesizer（DDS）is presented.The design integrates a high-speed digital DDS core,a high-speed differential current-steering mode 10-bit D/A converter,a serial/parall...A high-speed SiGe BiCMOS direct digital frequency synthesizer（DDS）is presented.The design integrates 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 0.35μm 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.展开更多
文摘Digital to analog converters(DAC)play an important role as a bridge connecting the analog world and the digital world.With the rapid development of wireless communication,wideband digital radar,and other emerging technologies,better performing high-speed high-resolution DACs are required.In those applications,signal bandwidth and high-frequency linearity often limited by data converters are the bottleneck of the system.This article reviews the state-of-the-art technologies of high-speed and high-resolution DACs reported in recent years.Comparisons are made between different architectures,circuit implementations and calibration techniques along with the figure of merit(FoM)results.
基金Project supported by the National High Technology Research and Development Program of China(No.2008AA010700)
文摘A 12-bit intrinsic accuracy digital-to-analog converter integrated into standard digital 0.18μm CMOS technology is proposed. It is based on a current steering segmented 6＋6 architecture and requires no calibration. By dividing one most significant bit unary source into 16 elements located in 16 separated regions of the array, the linear gradient errors and quadratic errors can be averaged and eliminated effectively. A novel static performance testing method is proposed. The measured differential nonlinearity and integral nonlinearity are 0.42 and 0.39 least significant bit, respectively. For 12-bit resolution, the converter reaches an update rate of 100 MS/s. The chip operates from a single 1.8 V voltage supply, and the core die area is 0.28 mm^2.
基金supported by the National Natural Science Foundation of China(Nos.60773025,60906009)the Program for Changjiang Scholars and Innovative Research Team in University
文摘A high-speed SiGe BiCMOS direct digital frequency synthesizer（DDS）is presented.The design integrates 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 0.35μm 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.
