A Wide Input-Range, Low-Power and Highly Flexible 18 Bit Time-to-Digital Converter with Compact Differential Circuit Topology

Peter Toth, Hiroki Ishikuro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a wide-dynamic-range high-resolution time-domain converter concept tailored for low-power sensor interfaces. The unique system structure applies different techniques to reduce circuit complexity, power consumption, and noise sensitivity. A multi-cycle concept, which allows a virtual delay line extension, is applied to achieve high resolution down to 1 ns. At the same time, it expands the dynamic range drastically up to 2.35 ms. Moreover, individually tunable delay elements in the range of 1 ns to 12 ns allow on the one hand on-demand flexible operation in a low- or high-resolution mode for smart sensing applications and flexible power control. On the other hand, delay stage mismatch calibration. The concept of this paper is evaluated through both simulation and hardware by a custom-designed PCB using commercially available components. An HDL state machine operates as control logic on a generic FPGA. The presented concept is highly suitable for on-chip integration.

Original languageEnglish
Title of host publication2020 IEEE 63rd International Midwest Symposium on Circuits and Systems, MWSCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages937-940
Number of pages4
ISBN (Electronic)9781538629161
DOIs
Publication statusPublished - 2020 Aug
Event63rd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2020 - Springfield, United States
Duration: 2020 Aug 92020 Aug 12

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2020-August
ISSN (Print)1548-3746

Conference

Conference63rd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2020
CountryUnited States
CitySpringfield
Period20/8/920/8/12

Keywords

  • Low-Power TDC
  • Multi-Stage TDC
  • Sensor Interface
  • Time-Domain Converter (TDC)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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