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In recent years, we have seen the emergence of multi-GS/s medium-to-high-resolution ADCs. Presently, SAR ADCs dominate low-speed applications and time-interleaved SARs are becoming increasingly popular for high-speed ADCs [1,2]. However the SAR architecture faces two key problems in simultaneously achieving multi-GS/s sample rates and high resolution: (1) the fundamental trade-off of comparator noise...
Jitter impairs the bit-error rate in high-speed communication systems. Jitter decomposition is important for accurately deriving the total jitter in a system and for aiding in identifying the root causes of jitter. We extend a previous approach for jitter decomposition in clock signals is to enable separation of correlated and uncorrelated jitter in both data and clock signals. We use time lag correlation...
Time interleaved A/D converters (TIADCs) provide an attractive solution to the realization of analog front ends in high speed communication systems. However, gain mismatch, offset mismatch, and sampling time mismatch between time-interleaved channels limit the performance of TIADCs. This paper presents a low-cost test scheme to measure timing mismatch using an undersampling clock. Our method is applicable...
It is important to separate random jitter from deterministic jitter to quantify their contributions to the total jitter. This paper identifies the limitations of the existing methodologies for jitter decomposition, and develops a new and efficient approach using time lag correlation functions to decompose different jitter components. The theory of the approach is developed and it is applied to a ring...
Jitter decomposition is important for accurately deriving the bit-error-rate in a system and for aiding in identifying the root causes of jitter. Limits of conventional solutions to this problem are discussed and a new approach to overcome the limitations is proposed. Our method uses time lag correlation functions to decompose different jitter components. The approach is validated by hardware measurements...
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