Shannon sampling theorem is the basic theorem in signal reconstruction based ondiscrete sampling values in communication theory. The convergence rate of thisformula, however, is very slow. Professor Pen Rui-reng. afte...Shannon sampling theorem is the basic theorem in signal reconstruction based ondiscrete sampling values in communication theory. The convergence rate of thisformula, however, is very slow. Professor Pen Rui-reng. after some slight compromiseon sampling rate, has come to the 3rd order, the 4th order and the 5th order samplingformulae. The calculation of the third order formula on the computer proves that itconverges much faster than the Shannon formula. This paper gives a general methodto comstruct a higher order sampling formula.展开更多
This paper describes a 12-bit 125-MS/spipelinedanalog-to-digitalconverter（ADC）thatisimplemented in a 0.18 #m CMOS process. A gate-bootstrapping switch is used as the bottom-sampling switch in the first stage to enha...This paper describes a 12-bit 125-MS/spipelinedanalog-to-digitalconverter（ADC）thatisimplemented in a 0.18 #m CMOS process. A gate-bootstrapping switch is used as the bottom-sampling switch in the first stage to enhance the sampling linearity. The measured differential and integral nonlinearities of the prototype are less than 0.79 least significant bit （LSB） and 0.86 LSB, respectively, at the full sampling rate. The ADC exhibits an effective number of bits （ENOB） of more than 11.05 bits at the input frequency of 10.5 MHz. The ADC also achieves a 10.5 bits ENOB with the Nyquist input frequency at the full sample rate. In addition, the ADC consumes 62 mW from a 1.9 V power supply and occupies 1.17 mm2, which includes an on-chip reference buffer. The figure-of-merit of this ADC is 0.23 p J/step.展开更多
文摘Shannon sampling theorem is the basic theorem in signal reconstruction based ondiscrete sampling values in communication theory. The convergence rate of thisformula, however, is very slow. Professor Pen Rui-reng. after some slight compromiseon sampling rate, has come to the 3rd order, the 4th order and the 5th order samplingformulae. The calculation of the third order formula on the computer proves that itconverges much faster than the Shannon formula. This paper gives a general methodto comstruct a higher order sampling formula.
基金Project supported by the Foundation of Shanghai Municipal Commission of Economy and Informatization(No.130311)
文摘This paper describes a 12-bit 125-MS/spipelinedanalog-to-digitalconverter（ADC）thatisimplemented in a 0.18 #m CMOS process. A gate-bootstrapping switch is used as the bottom-sampling switch in the first stage to enhance the sampling linearity. The measured differential and integral nonlinearities of the prototype are less than 0.79 least significant bit （LSB） and 0.86 LSB, respectively, at the full sampling rate. The ADC exhibits an effective number of bits （ENOB） of more than 11.05 bits at the input frequency of 10.5 MHz. The ADC also achieves a 10.5 bits ENOB with the Nyquist input frequency at the full sample rate. In addition, the ADC consumes 62 mW from a 1.9 V power supply and occupies 1.17 mm2, which includes an on-chip reference buffer. The figure-of-merit of this ADC is 0.23 p J/step.
