This paper presents a design of 14-bit 80 Msample/s pipelined ADC implemented in 0.35μm CMOS. A charge-sharing correction is proposed to remove the signal-dependent charge-injection,together with a low-jitter clock c...This paper presents a design of 14-bit 80 Msample/s pipelined ADC implemented in 0.35μm CMOS. A charge-sharing correction is proposed to remove the signal-dependent charge-injection,together with a low-jitter clock circuit,guaranteeing the high dynamic performance for the ADC.A scheme of capacitor-switching and a symmetrical layout technique minimizes capacitor mismatch,ensuring the overall linearity.The measured results show that the calibration-free ADC achieves an effective number of bits of 11.6-bit,spurious free dynamic range （SFDR） of 84.8 dB,signal-to-noise-and-distortion ratio（SNDR） of 72 dB,differential nonlinearity of＋0.63/—0.6 LSB and integrated nonlinearity of＋ 1.3/-0.9 LSB at 36.7 MHz input and maintains over 75 dB SFDR and 59 dB SNDR up to 200 MHz.展开更多
A novel scheme of photonic aided vector millimeter-wave(mm-wave)signal generation without a digital-to-analog converter(DAC)is proposed.Based on our scheme,a 20 Gb/s 4-ary quadrature amplitude modulation(4-QAM)mm-wave...A novel scheme of photonic aided vector millimeter-wave(mm-wave)signal generation without a digital-to-analog converter(DAC)is proposed.Based on our scheme,a 20 Gb/s 4-ary quadrature amplitude modulation(4-QAM)mm-wave signal is generated without using a DAC.The experiment results demonstrate that the bit error rate(BER)of 20 Gb/s 4-QAM mmwave signal can reach below the hard-decision forward-error-correction threshold after a delivery over 1 m wireless distance.Because the DAC is not required,it can reduce the system cost.Besides,by using photonic technology,the system is easily integrated to create large-scale production and application in high-speed optical communication.展开更多
文摘This paper presents a design of 14-bit 80 Msample/s pipelined ADC implemented in 0.35μm CMOS. A charge-sharing correction is proposed to remove the signal-dependent charge-injection,together with a low-jitter clock circuit,guaranteeing the high dynamic performance for the ADC.A scheme of capacitor-switching and a symmetrical layout technique minimizes capacitor mismatch,ensuring the overall linearity.The measured results show that the calibration-free ADC achieves an effective number of bits of 11.6-bit,spurious free dynamic range （SFDR） of 84.8 dB,signal-to-noise-and-distortion ratio（SNDR） of 72 dB,differential nonlinearity of＋0.63/—0.6 LSB and integrated nonlinearity of＋ 1.3/-0.9 LSB at 36.7 MHz input and maintains over 75 dB SFDR and 59 dB SNDR up to 200 MHz.
基金partially supported by the National Natural Science Foundation of China(Nos.61935005,61922025,61527801,61675048,61720106015,61835002,and 61805043)。
文摘A novel scheme of photonic aided vector millimeter-wave(mm-wave)signal generation without a digital-to-analog converter(DAC)is proposed.Based on our scheme,a 20 Gb/s 4-ary quadrature amplitude modulation(4-QAM)mm-wave signal is generated without using a DAC.The experiment results demonstrate that the bit error rate(BER)of 20 Gb/s 4-QAM mmwave signal can reach below the hard-decision forward-error-correction threshold after a delivery over 1 m wireless distance.Because the DAC is not required,it can reduce the system cost.Besides,by using photonic technology,the system is easily integrated to create large-scale production and application in high-speed optical communication.
