A 16-Channel High-Voltage ASIC with Programmable Delay Lines for Image-Guided Ultrasound Neuromodulation
A 16-Channel High-Voltage ASIC with Programmable Delay Lines for Image-Guided Ultrasound Neuromodulation
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DOI：
10.1109/biocas54905.2022.9948689
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发表时间：
2022-10
期刊：
影响因子：
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通讯作者：
Ardavan Javid;Chenyuan Zhao;M. Kiani
中科院分区：
文献类型：
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作者：
Ardavan Javid;Chenyuan Zhao;M. Kiani
传统的超声神经调节（USN）系统利用庞大的电子器件来驱动单元件超声（US）换能器。为了在给定的组织体积内实现大规模的USN，应该以波束成形的方式电子地驱动US换能器阵列，以将聚焦的US波束转向不同的神经目标。本文介绍了一种16通道高压ASIC（具有4通道US成像前端），用于驱动适合图像引导USN应用的16元件压电传感器阵列。ASIC集成了16个通道的可编程延迟线，由外部接口控制，只有三根线，以提供光束聚焦和转向能力。ASIC还集成了8通道神经记录前端和感应电源管理电路。该ASIC采用0.25 μ mHV BCD CMOS工艺设计和制作，面积为8.7× 6.6mm2。在测量中，已证明了具有可编程延迟线的高压驱动器在2 MHz下产生50 V峰峰值脉冲的性能，总延迟范围为32.05 µs，并进行了微调。
Conventional ultrasound neuromodulation (USN) systems utilize bulky electronics to drive a single-element ultrasonic (US) transducer. To achieve large-scale USN within a given tissue volume, a US transducer array should electronically be driven in a beamforming fashion to steer focused US beams towards different neural targets. This paper presents a 16-channel high-voltage ASIC (with 4-channel US imaging frontend) for driving a 16-element piezoelectric transducer array suitable for image-guided USN applications. The ASIC integrates programmable delay lines for 16 channels, controlled by an external interface with only three wires, to provide beam focusing and steering capability. The ASIC also integrates 8-channel neural recording frontend and an inductive power management circuity. The ASIC was designed and fabricated in a 0.25 μm HV BCD CMOS process with an area of 8.7×6.6 mm2. In measurements, the performance of the high-voltage drivers with programmable delay lines in generating 50 V peak-peak pulses at 2 MHz with the total delay range of 32.05 µs and fine tuning has been demonstrated.