@inproceedings{185e77168a1e49a089fe2cd24f7ba2b9,
title = "Extended bandwidth open-loop VCO based ADC using Interleaving with a single VCO channel",
abstract = "This paper presents a technique to extend the bandwidth of an open-loop Voltage Controlled Oscillator (VCO) based Analogue-to-Digital Converters (ADC), using the Time Interleaving (TI) principle. Unlike the conventional TI implementation, the presented concept uses a single VCO channel and interleaves the sampling circuits. This approach utilizes the wide VCO bandwidth and operates effectively at a higher sampling rate compared to traditional implementations. Furthermore, the proposed design overcomes the speed constraints imposed by the technology, achieving enhanced performance with minimal additional hardware, resulting a highly compact solution. Simulation results demonstrate that, for a 230 MHz bandwidth, the proposed open-loop interleaved VCO-based ADC achieves an SNR of 39.96 dB, compared to 27.33 dB in the conventional open-loop implementation.",
keywords = "ADC, Analog-to-Digital Converter, FDC, First Order Noise Shaping, Frequency-to-Digital Conversion, Jitter, Noise Shaping, Non-linearity, NS, Phase Noise, PN, Ring Oscillator, RO, VCO, VCO Phase, Voltage Controlled Oscillator",
author = "Subhash Chevella and Ivan O'Connell and Daniel O'Hare",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE International Symposium on Circuits and Systems, ISCAS 2025 ; Conference date: 25-05-2025 Through 28-05-2025",
year = "2025",
doi = "10.1109/ISCAS56072.2025.11043230",
language = "English",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "ISCAS 2025 - IEEE International Symposium on Circuits and Systems, Proceedings",
address = "United States",
}