TY - GEN
T1 - A 3mW 2.7GS/s 8b Subranging ADC with Multiple-Reference-Reference-Embedded Comparators
AU - Wang, Jia Ching
AU - Kuo, Tai Haur
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - A subranging ADC is a good choice for wideband applications since the numerous comparators for a flash ADC can be avoided [1-5]. However, despite the reduced number of comparators that a subranging ADC requires, these comparators still consume a considerable amount of power and induce a severe kickback error as well as heavy parasitics, thus degrading the accuracy of the ADC. In addition, a power-hungry resistor ladder is also required to provide reference voltages for the comparators. Although the reference-embedded comparator (REC) can avoid the use of a resistor ladder by realizing a deliberate offset voltage as an embedded reference (ER) voltage inside a comparator [3], [5], the aforementioned problems attributed to a number of comparators still exist. Therefore, to retain an ADC with both good power efficiency and good accuracy, a multiple-reference-embedded comparator (MREC) is proposed in this work, which equips multiple ER voltages in a single comparator and thereby reduces the number of comparators by over 70%.
AB - A subranging ADC is a good choice for wideband applications since the numerous comparators for a flash ADC can be avoided [1-5]. However, despite the reduced number of comparators that a subranging ADC requires, these comparators still consume a considerable amount of power and induce a severe kickback error as well as heavy parasitics, thus degrading the accuracy of the ADC. In addition, a power-hungry resistor ladder is also required to provide reference voltages for the comparators. Although the reference-embedded comparator (REC) can avoid the use of a resistor ladder by realizing a deliberate offset voltage as an embedded reference (ER) voltage inside a comparator [3], [5], the aforementioned problems attributed to a number of comparators still exist. Therefore, to retain an ADC with both good power efficiency and good accuracy, a multiple-reference-embedded comparator (MREC) is proposed in this work, which equips multiple ER voltages in a single comparator and thereby reduces the number of comparators by over 70%.
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U2 - 10.1109/ISSCC42615.2023.10067498
DO - 10.1109/ISSCC42615.2023.10067498
M3 - Conference contribution
AN - SCOPUS:85151620351
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 276
EP - 278
BT - 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
Y2 - 19 February 2023 through 23 February 2023
ER -