Efficient numerical methods in non-uniform sampling theory
Numerische Mathematik
A New Class of Asynchronous A/D Converters Based on Time Quantization
ASYNC '03 Proceedings of the 9th International Symposium on Asynchronous Circuits and Systems
On the estimation of the bandwidth of nonuniformly sampled signals
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 04
Analysis and simulation of continuous-time digital signal processors
Signal Processing
A low propagation delay dispersion comparator for a level-crossing AD converter
Analog Integrated Circuits and Signal Processing
Nonuniform Sampling of Periodic Bandlimited Signals
IEEE Transactions on Signal Processing - Part I
Event-driven data acquisition and digital signal processing: a tutorial
IEEE Transactions on Circuits and Systems II: Express Briefs
Tracking the best level set in a level-crossing analog-to-digital converter
Digital Signal Processing
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A performance evaluation of a level-crossing analog-to-digital converter (ADC) is presented. It is shown that its signal-to-noise ratio (SNR) does not depend on the input-signal amplitude, which results in an almost-flat SNR for amplitudes that fall into the Nyquist criteria for irregular sampling. The influence of the reconstruction procedure on SNR is discussed, and possible limitations due to the comparator and clock on the performance of the ADC are analyzed. This analysis allows for specification of comparator and clock parameters such that they do not limit the ADC performance yet are not overestimated. In conclusion, a previously known level-crossing ADC design procedure is extended. A level-crossing ADC design example is given for intended use in an ultrasound application with a frequency band from 1 to 10 MHz. MATLAB and Cadence simulations, which utilize the data obtained from a real comparator and clock, are presented, and the performance of such a level-crossing ADC is compared with a conventional ADC.