This paper presents a resolution reconfigurable two-step successive approximation register analog-to-digital(A/D)converter(ADC)with the pseudo-multiple sampling(PMS)and gain error calibration method for CMOS image sen...This paper presents a resolution reconfigurable two-step successive approximation register analog-to-digital(A/D)converter(ADC)with the pseudo-multiple sampling(PMS)and gain error calibration method for CMOS image sensors.The proposed ADC can be configured with 10-bit,11-bit and 12-bit by adjusting the number of 10-bit A/D conversions,thereby satisfying various demands in different situations.The PMS method enables the attainment of high-resolution ADC results by summing the conversion outputs of several low-resolution ADCs,thereby reducing the number of unit capacitors and the area of the capacitor array.A compensation technique is proposed to expand the quantization range and improve the effective resolution of the proposed ADC.A calibration method suitable for bottom-plate sampling is proposed,which reduces the gain error between reference voltages.Simulated in a 55 nm process,the proposed ADC in the 12-bit mode achieves a differential nonlinearity of+0.47/-0.50 least significant bit(LSB)and an integral nonlinearity of+0.75/-0.84 LSB at a sampling frequency of 3.497×10^(5)per second with the calibration.The effective number of bits reaches 11.63 bits.The area occupied by a single ADC column is 39.5μm×119.2μm and the power consumption is 62.8μW.展开更多
In this paper, we will consider the simplest pseudo-addition where pseudo-multiplication and pseudo-division are the same as the ordinary ones and distributivity hold. Using this we consider a special type of the non-...In this paper, we will consider the simplest pseudo-addition where pseudo-multiplication and pseudo-division are the same as the ordinary ones and distributivity hold. Using this we consider a special type of the non-uniform discrete times with the pseudo-translation symmetry. Besides, we demand that the displacement should be invariant under the pseudo-translation. From these, we obtain the new definition of the instantaneous velocity which is pseudo-translation symmetry in both time and position and formulate the mechanics which are pseudo-linear and pseudo-translation invariant.展开更多
基金supported by Key Research Project of Jiangsu Province(No.BE2023019-3)Joint Project of Yangtze River Delta Community of Sci-Tech Innovation(No.2022CSJGG0402)。
文摘This paper presents a resolution reconfigurable two-step successive approximation register analog-to-digital(A/D)converter(ADC)with the pseudo-multiple sampling(PMS)and gain error calibration method for CMOS image sensors.The proposed ADC can be configured with 10-bit,11-bit and 12-bit by adjusting the number of 10-bit A/D conversions,thereby satisfying various demands in different situations.The PMS method enables the attainment of high-resolution ADC results by summing the conversion outputs of several low-resolution ADCs,thereby reducing the number of unit capacitors and the area of the capacitor array.A compensation technique is proposed to expand the quantization range and improve the effective resolution of the proposed ADC.A calibration method suitable for bottom-plate sampling is proposed,which reduces the gain error between reference voltages.Simulated in a 55 nm process,the proposed ADC in the 12-bit mode achieves a differential nonlinearity of+0.47/-0.50 least significant bit(LSB)and an integral nonlinearity of+0.75/-0.84 LSB at a sampling frequency of 3.497×10^(5)per second with the calibration.The effective number of bits reaches 11.63 bits.The area occupied by a single ADC column is 39.5μm×119.2μm and the power consumption is 62.8μW.
文摘In this paper, we will consider the simplest pseudo-addition where pseudo-multiplication and pseudo-division are the same as the ordinary ones and distributivity hold. Using this we consider a special type of the non-uniform discrete times with the pseudo-translation symmetry. Besides, we demand that the displacement should be invariant under the pseudo-translation. From these, we obtain the new definition of the instantaneous velocity which is pseudo-translation symmetry in both time and position and formulate the mechanics which are pseudo-linear and pseudo-translation invariant.
