An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept

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 allows a virtual delay line extension and 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-demand flexible operation in a low- or high-resolution mode for smart sensing applications and flexible power control. The concept of this paper is evaluated by a custom-designed FPGA supported PCB. The presented concept is highly suitable for on-chip integration.University LSI Design Contest ASP-DAC 2021