This paper presents the design and implementation of a digitally calibrated CMOS wideband radio frequency(RF) root-mean-square(RMS) power detector for high accuracy RF automatic gain control(AGC).The proposed RMS powe...This paper presents the design and implementation of a digitally calibrated CMOS wideband radio frequency(RF) root-mean-square(RMS) power detector for high accuracy RF automatic gain control(AGC).The proposed RMS power detector demonstrates accurate power detection in the presence of process,supply voltage, and temperature(PVT) variations by employing a digital calibration scheme.It also consumes low power and occupies a small chip area.The measurement results show that the scheme improves the accuracy of the detector to better than 0.3 dB over the PVT variations and wide operating frequency range from 0.2 to 0.8 GHz.Implemented in a 0.18μm CMOS process and occupying a small die area of 263×214μm^2,the proposed digitally calibrated CMOS RMS power detector only consumes 1.6 mA in power detection mode and 2.1 mA in digital calibration mode from a 1.8 V supply voltage.展开更多
压力仪表是工业生产过程中不可缺少的测量设备,对压力仪表的校准是保证其测量精度的必要手段,标准压力校准系统是校准过程的重要设备。全数字标准液体压力校准系统以数字信号处理技术为核心,借助数字信号处理器(digital signal processo...压力仪表是工业生产过程中不可缺少的测量设备,对压力仪表的校准是保证其测量精度的必要手段,标准压力校准系统是校准过程的重要设备。全数字标准液体压力校准系统以数字信号处理技术为核心,借助数字信号处理器(digital signal processor,DSP)的强大运算能力和现场可编程门阵列(field programmable gate array,FPGA)的控制能力,实现了标准液体压力校准系统的精确控制。控制过程采用增量式PID算法,并利用积分分离技术实现了低超调的压力控制。实验结果表明:液体压力控制过程无明显超调,液体压力控制精度达到±0.02%的设计要求。展开更多
基金supported by the National High Technology Research and Development Program of China(No.2009AA011608)the Chinese National Major Science and Technology Projects Program(No.2009ZX01031-002-011-001)
文摘This paper presents the design and implementation of a digitally calibrated CMOS wideband radio frequency(RF) root-mean-square(RMS) power detector for high accuracy RF automatic gain control(AGC).The proposed RMS power detector demonstrates accurate power detection in the presence of process,supply voltage, and temperature(PVT) variations by employing a digital calibration scheme.It also consumes low power and occupies a small chip area.The measurement results show that the scheme improves the accuracy of the detector to better than 0.3 dB over the PVT variations and wide operating frequency range from 0.2 to 0.8 GHz.Implemented in a 0.18μm CMOS process and occupying a small die area of 263×214μm^2,the proposed digitally calibrated CMOS RMS power detector only consumes 1.6 mA in power detection mode and 2.1 mA in digital calibration mode from a 1.8 V supply voltage.
