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Abstract:
This paper proposes a novel 10-GS/s 7-bit time-interleaved time-domain Successive Approximation Register (SAR) Analog-To-Digital Converter (ADC) that utilizes a speed-enhanced bootstrapped switch and a triple-latch comparator. The proposed ADC comprises a 4-way time-domain ADC that employs the constant current source charge Voltage-To-Time Converter (VTC) and the 7-bit SAR Time-To-Digital Converter (TDC) for medium resolution and high conversion speed. Unlike conventional approaches, an additional passive discharge path is utilized to improve the settling time of the switch while reducing the parasitism of the critical path. To further enhance the ADC conversion speed, the triple-latch feed-forward comparator operates in parallel to the TDC delay cell, eliminating its timing from the critical loop. The prototype was fabricated using a 65nm CMOS process, and simulation results demonstrate an SNR of 40.12 dB and an SFDR of 50.08 dB at a conversion rate of up to 10-GS/s and input frequency up to 4.41-GS/s. © 2023 IEEE.
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ISSN: 2163-5048
Year: 2023
Page: 167-170
Language: English
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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