A Domain Extension Algorithm for Digital Error Correction of Pipeline ADCs

• 作者: Chao You Ting Li
• 来源期刊: 电路与系统(英文)
• 学科: 工学
• 关键词: BEHAVIORAL Simulation COMPARATOR OFFSETS Domain Extension ALGORITHM Pipeline ADCS
• 年，卷（期）: dlyxtyw,（2）
• 页码范围: 39-44
• 页数: 6页
• 分类号: TN7

摘要

A domain extension algorithm to correct the comparator offsets of pipeline analog-to-digital converters (ADCs) is presented, in which the 1.5-bit/stage ADC quantify domain is extended from a three-domain to a five-domain. This algorithm is designed for high speed and low comparator accuracy application. The comparator offset correction ability is improved. This new approach also promises significant improvements to the spurious-free dynamic range (SFDR), the total harmonic distortion (THD), the signal-to-noise ratio (SNR) and the minor analog and digital circuit modifications. Behavioral simulation results are presented to demonstrate the effectiveness of the algorithm, in which all absolute values of comparator offsets are set to |3Vref/8|. SFDR, THD and SNR are improved, from 34.62-dB, 34.63-dB and 30.33-dB to 60.23-dB, 61.14-dB and 59.35-dB, respectively, for a 10-bit pipeline ADC.