An all-digital low-power, low-frequency GRO-based time to digital converter for biomedical applications

Zafarkhah, Elnaz; Zare, Maryam; Anzabi-Nezhad, Nima S.; Sohrabi, Zahra

doi:10.1007/s10470-023-02246-9

Cited by 1 publication

(1 citation statement)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The paper [14] adopts a comparator structure circuit to do the sampling, which effectively reduces the occurrence of sampling error and improves the linearity of the TDC, which also requires time correction processing, has a more complex structure, and the dual delay loop is susceptible to PVT. The paper [20] proposed a Gated Ring Oscillator (GRO)architecture to reduce the area and power consumption. Nevertheless, it adopts a D ip-op for the sampling with a resolution of 1.76 ns at 1KS/s sampling frequency.…”

Section: Analysis and Discussion Of Simulation Resultsmentioning

confidence: 99%

A high-performance time to digital converter for dToF LIDAR applications

Chen,

Li,

Cheng

2024

Preprint

View full text Add to dashboard Cite

As the resolution and conversion speed of Time-to-Digital Conversion (TDC) chips continue to improve, the bit error rate also increases, leading to a decrease in the linearity of TDC and seriously affecting measurement accuracy. This paper presents a high linearity, low power consumption, and wide dynamic range TDC that has been achieved based on the SMIC 180 nm V3E BCD process. Compared with previous research methods, the proposed phase arbiter structure can eliminate sampling errors and improve the linearity of TDC. The preprocessing circuit can eliminate fixed errors caused by Start and Stop signal transmission delays. Post-simulation results show that the TDC has high linearity, with ranges of DNL and INL being − 0.76LSB < DNL < 0.89LSB, and − 0.59LSB < INL < 0.73LSB, respectively. The highest resolution is 150 ps, dynamic range is 2.5 ms, and the power consumption is 1.73 mW. The overall system architecture of TDC is very simple, and it can be applied to dToF LIDAR to measure photon flight time, capable of measuring a range of up to a kilometer, with an accuracy of 2.25 centimeters, high linearity, and without any post-processing or time calibration.

show abstract

Section: Analysis and Discussion Of Simulation Resultsmentioning

confidence: 99%