Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/152448
Title: A 12-bit branching time-to-digital converter with power saving features and digital based resolution tuning for PVT variations
Authors: Teh, Jian Sen
Siek, Liter
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Teh, J. S. & Siek, L. (2020). A 12-bit branching time-to-digital converter with power saving features and digital based resolution tuning for PVT variations. Analog Integrated Circuits and Signal Processing, 105(1), 57-71. https://dx.doi.org/10.1007/s10470-020-01678-x
Journal: Analog Integrated Circuits and Signal Processing
Abstract: This paper presents a 12-bit branching Time-to-Digital converter (TDC) fabricated in a 40 nm CMOS technology. It composes of a 6-bit coarse counter TDC, and a 6-bit fine TDC. The fine TDC utilizes a proposed branching technique to interpolate between the phases of a 16-stage gated ring oscillator, increasing its number of phases from 16 to 64. Therefore, the TDC resolution is improved to be 4 times finer. The TDC incorporates fully digital based resolution tuning capability that enables its resolution to be more stable over PVT variations. Measurement results show that the resolution tuning reduces the resolution variation by 92.3% over a temperature range of − 40 to 125 °C. However, the simple resolution tuning method causes the TDC to have a relatively large resolution of 36.2 ps. The trade-offs between TDC resolution, yield, and scalability are discussed. The proposed TDC uses simple gated inverters based samplers instead of conventional arbiters to reduce power and area consumption. In addition, power gating features of the proposed TDC enable a low power consumption of 275 µW at a sampling rate of 5 MS/s. Without any linearity calibrations, the TDC DNL, INL, single-shot precision, and figure-of-merit are measured to be 1.30 LSB, 3.61 LSB, 0.75 LSB, and 61.9 fJ/conv.-step, respectively.
URI: https://hdl.handle.net/10356/152448
ISSN: 0925-1030
DOI: 10.1007/s10470-020-01678-x
Schools: School of Electrical and Electronic Engineering 
Research Centres: VIRTUS, IC Design Centre of Excellence 
Rights: © 2020 Springer Science+Business Media, LLC, part of Springer Nature. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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