Please use this identifier to cite or link to this item:
|Title:||A 13μW 87dB dynamic range implantable ΔΣ modulator for full-spectrum neural recording|
low voltage low power design
wide system dynamic range
|Citation:||Xu, J.,Islam, M.K.,Wang, S.,Yang, Z. (2013). A 13μW 87dB dynamic range implantable ΔΣ modulator for full-spectrum neural recording. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS : 2764-2767. ScholarBank@NUS Repository. https://doi.org/10.1109/EMBC.2013.6610113|
|Abstract:||Experiment analysis on in-vivo data sequences suggests a wide system dynamic range (DR) is required to simultaneously record local field potentials (LFPs), extra-cellular spikes, and artifacts/interferences. In this paper, we present a 13 μW 87 dB DR ΔΣ modulator for full-spectrum neural recording. To achieve a wide DR and low power consumption, a fully-differential topology is used with multi-bit (MB) quantization scheme and switched-opamp (SO) technique. By adopting a novel fully-clocked scheme, a power-efficient current-mirror SO is developed with 50% power saving, which doubles the figure-of-merit (FOM) over its counterpart. A new static power-less multi-bit quantizer with 96% power and 69% area reduction is also introduced. Besides, instead of metal-insulator-metal (MIM) capacitor, three high-density MOS capacitor (MOSCAP) structures are employed to reduce circuit area. Measurement results show a peak signal-to-noise and distortion ratio (SNDR) of 85 dB with 10 kHz bandwidth at 1.0 V supply, corresponding to an FOM of 45 fJ/conv.-step. which is implemented in a 0.18 μm CMOS © 2013 IEEE.|
|Source Title:||Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 11, 2019
checked on Dec 15, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.