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Higher speed and larger resolution are typically attained using pipelined ADCs. However, voltage-domain pipelined ADCs require high gain and bandwidth opamps to amplify the residual signal for successive stages. Moreover, for high speed and resolution applications, opamp design is extremely challenging due to its smaller gain, lower overdrive voltage and larger noise.

Adapted from Waqas Hassan Siddiqui, “Voltage-to-Time Converter for High-Speed Time-Based Analog-to-Digital Converters,” M.Sc. thesis, School of Electrical Engineering, Aalto Univ., Espoo, Finland, 2018. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License