Name
Title | ||
|---|---|---|
An Adaptive-Resolution Quasi-Level-Crossing Delta Modulator With VCO-Based Residue Quantizer |
Abstract | ||
|---|---|---|
This brief introduces an adaptive-resolution (AR) quasi-level-crossing delta modulator ADC with a voltage-controlled oscillator (VCO)-based residue quantizer for Internet-of-Things (IoT) wireless sensor nodes. The residue voltage signal is digitized by a VCO-based residue quantizer, thus leading to a straightforward implementation of level-crossing (LC) and AR algorithms in digital domain. The inherent and mismatch-induced dithering provided by the VCO-based residue quantizer increases the proposed modulator's dynamic range and average sampling rate for slowly-varying input signals, enabling accurate sampling and conversion. For fast-varying signals, the AR algorithm is adopted to reduce the average sampling rate by a factor of three compared to the straightforward LC algorithm at the edge of the modulator's signal bandwidth. Fabricated in 28-nm CMOS, the proposed modulator achieves a peak SNDR of 53dB over a signal bandwidth of 1.78MHz. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1109/TCSII.2020.2979078 | IEEE Transactions on Circuits and Systems II: Express Briefs |
Keywords | DocType | Volume |
Adaptive resolution (AR),ADC,compressed sensing,delta modulator,event-based signal processing,Internet-of-Things (IoT),level-crossing (LC),VCO-based quantizer | Journal | 67 |
Issue | ISSN | Citations |
12 | 1549-7747 | 3 |
PageRank | References | Authors |
0.38 | 0 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Hongying Wang | 1 | 8 | 1.82 |
| Viet Nguyen | 2 | 4 | 0.74 |
| Filippo Schembari | 3 | 11 | 2.52 |
| Robert Bogdan Staszewski | 4 | 536 | 93.76 |