This paper describes a 12-bit 40 MS/s calibration-free pipelined analog-to-digital converter（ADC）,which is optimized for high spurious free dynamic range（SFDR） performance and low power dissipation.With a 4.9 MHz ...This paper describes a 12-bit 40 MS/s calibration-free pipelined analog-to-digital converter（ADC）,which is optimized for high spurious free dynamic range（SFDR） performance and low power dissipation.With a 4.9 MHz sine wave input,the prototype ADC implemented in a 0.18-μm 1P6M CMOS process shows measured differential nonlinearity and integral nonlinearity within 0.78 and 1.32 least significant bits at the 12-bit level without any trimming or calibration.The ADC,with a total die area of 3.1×2.1 mm^2,demonstrates a maximum signal-to-noise distortion ratio（SNDR） and SFDR of 66.32 and 83.38 dB,respectively,at a 4.9 MHz analog input and a power consumption of 102 mW from a 1.8 V supply.展开更多
A novel architecture of a pipelined redundant-signed-digit analog to digital converter（RSD-ADC） is presented featuring a high signal to noise ratio（SNR）, spurious free dynamic range（SFDR） and signal to noise plu...A novel architecture of a pipelined redundant-signed-digit analog to digital converter（RSD-ADC） is presented featuring a high signal to noise ratio（SNR）, spurious free dynamic range（SFDR） and signal to noise plus distortion（SNDR） with efficient background correction logic. The proposed ADC architecture shows high accuracy with a high speed circuit and efficient utilization of the hardware. This paper demonstrates the functionality of the digital correction logic of 14-bit pipelined ADC at each 1.5 bit/stage. This prototype of ADC architecture accounts for capacitor mismatch, comparator offset and finite Op-Amp gain error in the MDAC（residue amplification circuit）stages. With the proposed architecture of ADC, SNDR obtained is 85.89 d B, SNR is 85.9 d B and SFDR obtained is 102.8 d B at the sample rate of 100 MHz. This novel architecture of digital correction logic is transparent to the overall system, which is demonstrated by using 14-bit pipelined ADC. After a latency of 14 clocks, digital output will be available at every clock pulse. To describe the circuit behavior of the ADC, VHDL and MATLAB programs are used. The proposed architecture is also capable of reducing the digital hardware. Silicon area is also the complexity of the design.展开更多
文摘This paper describes a 12-bit 40 MS/s calibration-free pipelined analog-to-digital converter（ADC）,which is optimized for high spurious free dynamic range（SFDR） performance and low power dissipation.With a 4.9 MHz sine wave input,the prototype ADC implemented in a 0.18-μm 1P6M CMOS process shows measured differential nonlinearity and integral nonlinearity within 0.78 and 1.32 least significant bits at the 12-bit level without any trimming or calibration.The ADC,with a total die area of 3.1×2.1 mm^2,demonstrates a maximum signal-to-noise distortion ratio（SNDR） and SFDR of 66.32 and 83.38 dB,respectively,at a 4.9 MHz analog input and a power consumption of 102 mW from a 1.8 V supply.
文摘A novel architecture of a pipelined redundant-signed-digit analog to digital converter（RSD-ADC） is presented featuring a high signal to noise ratio（SNR）, spurious free dynamic range（SFDR） and signal to noise plus distortion（SNDR） with efficient background correction logic. The proposed ADC architecture shows high accuracy with a high speed circuit and efficient utilization of the hardware. This paper demonstrates the functionality of the digital correction logic of 14-bit pipelined ADC at each 1.5 bit/stage. This prototype of ADC architecture accounts for capacitor mismatch, comparator offset and finite Op-Amp gain error in the MDAC（residue amplification circuit）stages. With the proposed architecture of ADC, SNDR obtained is 85.89 d B, SNR is 85.9 d B and SFDR obtained is 102.8 d B at the sample rate of 100 MHz. This novel architecture of digital correction logic is transparent to the overall system, which is demonstrated by using 14-bit pipelined ADC. After a latency of 14 clocks, digital output will be available at every clock pulse. To describe the circuit behavior of the ADC, VHDL and MATLAB programs are used. The proposed architecture is also capable of reducing the digital hardware. Silicon area is also the complexity of the design.
