论文标题
TD-BPQBC：1.8μW5.5mm3无ADC神经植入物SOC利用13.2pj/样品时间域Bi-phase quasi static静态脑通信
TD-BPQBC: A 1.8μW 5.5mm3 ADC-less Neural Implant SoC utilizing 13.2pJ/Sample Time-domain Bi-phasic Quasi-static Brain Communication
论文作者
论文摘要
具有数据传输和能量收集能力的无限制的微型无线神经传感器节点要求电路和系统级创新，以实现用于脑机界面的超低能量深植入物。 Realizing that the energy and size constraints of a neural implant motivate highly asymmetric system design (a small, low-power sensor and transmitter at the implant, with a relatively higher power receiver at a body-worn hub), we present Time-Domain Bi-Phasic Quasi-static Brain Communication (TD- BPQBC), offloading the burden of analog to digital conversion (ADC) and digital signal processing (DSP) to the 接收者。输入模拟信号转换为时域脉冲宽度调制（PWM）波形，并使用最近开发的BPQBC方法传输，以降低植入物中的通信功率。总体SOC在800ksps的传感和通信时仅消耗1.8μw的功率。发射机的能效率仅为1.1pj/b，比最先进的能源效率高30倍，可以实现全电动，能量收获和连接的脑内传感器/刺激器节点。
Untethered miniaturized wireless neural sensor nodes with data transmission and energy harvesting capabilities call for circuit and system-level innovations to enable ultra-low energy deep implants for brain-machine interfaces. Realizing that the energy and size constraints of a neural implant motivate highly asymmetric system design (a small, low-power sensor and transmitter at the implant, with a relatively higher power receiver at a body-worn hub), we present Time-Domain Bi-Phasic Quasi-static Brain Communication (TD- BPQBC), offloading the burden of analog to digital conversion (ADC) and digital signal processing (DSP) to the receiver. The input analog signal is converted to time-domain pulse-width modulated (PWM) waveforms, and transmitted using the recently developed BPQBC method for reducing communication power in implants. The overall SoC consumes only 1.8μW power while sensing and communicating at 800kSps. The transmitter energy efficiency is only 1.1pJ/b, which is >30X better than the state-of-the-art, enabling a fully-electrical, energy-harvested, and connected in-brain sensor/stimulator node.
