000			02309 am a22002413u 4500
042			_adc
100	1	0	_aSong, Minyoung _eauthor _92756
700	1	0	_aHuang, Yu _eauthor _92757
700	1	0	_aVisser, Hubregt J. _eauthor _92758
700	1	0	_aRomme, Jac _eauthor _92759
700	1	0	_aLiu, Yao-Hong _eauthor _92760
245	0	0	_aAn Energy-Efficient and High-Data-Rate IR-UWB Transmitter for Intracortical Neural Sensing Interfaces
260			_c2022-12.
500			_a/pmc/articles/PMC7614137/
500			_a/pubmed/36743394
520			_aThis paper presents an implantable impulse-radio ultra-wideband (IR-UWB) wireless telemetry system for intracortical neural sensing interfaces. A 3-dimensional (3-D) hybrid impulse modulation that comprises phase shift keying (PSK), pulse position modulation (PPM) and pulse amplitude modulation (PAM) is proposed to increase modulation order without significantly increasing the demodulation requirement, thus leading to a high data rate of 1.66 Gbps and an increased air-transmission range. Operating in 6 - 9 GHz UWB band, the presented transmitter (TX) supports the proposed hybrid modulation with a high energy efficiency of 5.8 pJ/bit and modulation quality (EVM< -21 dB). A low-noise injection-locked ring oscillator supports 8-PSK with a phase error of 2.6°. A calibration free delay generator realizes a 4-PPM with only 115 μW and avoids potential cross-modulation between PPM and PSK. A switch-cap power amplifier with an asynchronous pulse-shaping performs 4-PAM with high energy efficiency and linearity. The TX is implemented in 28 nm CMOS technology, occupying 0.155mm(2) core area. The wireless module including a printed monopole antenna has a module area of only 1.05 cm(2). The transmitter consumes in total 9.7 mW when transmitting -41.3 dBm/MHz output power. The wireless telemetry module has been validated ex-vivo with a 15-mm multi-layer porcine tissue, and achieves a communication (air) distance up to 15 cm, leading to at least 16× improvement in distance-moralized energy efficiency of 45 pJ/bit/meter compared to state-of-the-art.
540			_a
546			_aen
690			_aArticle
655	7		_aText _2local
786	0		_nIEEE J Solid-State Circuits
856	4	1	_uhttp://dx.doi.org/10.1109/JSSC.2022.3212672 _zConnect to this object online.
999			_c463 _d463