Paper Info
Title
Dickson-Charge-Pump-Based Voltage-to-Time Conversion for Time-Based ADCs in 28-nm CMOS
Abstract
This article demonstrates a digitally friendly time-based analog-to-digital converter (ADC) exploiting Dickson charge-pump (CP) as part of a voltage-to-time conversion (VTC) implemented in 28-nm CMOS. In the proposed technique, the Dickson CP generates a ramp signal that is compared with the input voltage to generate a pulse of commensurable widths, which is then fed to a D-type flip-flop (DFF)-based time-to-digital converter (TDC). The TDC is composed of CMOS DFFs and digital circuits for digital conversion without any use of analog-intensive circuits, e.g., amplifiers or current sources. Thanks to the robustness of Dickson CP characteristics, the digital outputs of the proposed ADC can be corrected through a low-complexity deterministic digital mapping with improvements of 1.5-bit in peak effective number of bits (ENOB) and 9 dB in peak signal-to-noise-and-distortion ratio (SNDR) verified over three measured sample prototypes.
Year
DOI
Venue
2021
10.1109/OJCAS.2020.3043094
IEEE Open Journal of Circuits and Systems
Keywords
DocType
Volume
Analog-to-digital converter (ADC),time-based ADC,Dickson charge pump (CP),time quantization,voltage-to-time converter (VTC),ADC calibration,distortion correction
Journal
2
Citations 
PageRank 
References 
1
0.35
0
Authors
5
Name
Order
Citations
PageRank
Ali Esmailiyan142.08
Jianglin Du252.57
Teerachot Siriburanon314921.47
Filippo Schembari4112.52
Robert Bogdan Staszewski553693.76