Department of Electrical Engineering, National Central University, Taoyuan 32001, Taiwan.
Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
Sensors (Basel). 2019 Nov 20;19(23):5063. doi: 10.3390/s19235063.
This article presents a high-voltage (HV) pulse driver based on silicon-on-insulator (SOI) technology for biomedical ultrasound actuators and multi-channel portable imaging systems specifically. The pulse driver, which receives an external low-voltage drive signal and produces high-voltage pulses with a balanced rising and falling edge, is designed by synthesizing high-speed, capacitor-coupled level-shifters with a high-voltage H-bridge output stage. In addition, an on-chip floating power supply has also been developed to simplify powering the entire system and reduce static power consumption. The electrical and acoustic performance of the integrated eight-channel pulse driver has been verified by using medical-grade ultrasound probes to acquire the transmit/echo signals. The driver can produce pulse signals >100 Vpp with rise and fall times within 18.6 and 18.5 ns, respectively. The static power required to support the overall system is less than 3.6 mW, and the power consumption of the system during excitation is less than 50 mW per channel. The second harmonic distortion of the output pulse signal is as low as -40 dBc, indicating that the integrated multi-channel pulse driver can be used in advanced portable ultrasonic imaging systems.
这篇文章提出了一种基于绝缘体上硅（SOI）技术的高压（HV）脉冲驱动器，专门用于生物医学超声换能器和多通道便携式成像系统。该脉冲驱动器接收外部低压驱动信号，并产生具有平衡上升和下降沿的高压脉冲，通过将高速、电容耦合电平转换器与高压 H 桥输出级相结合来设计。此外，还开发了片上浮动电源，以简化整个系统的供电并降低静态功耗。通过使用医用超声探头获取发射/回波信号，验证了集成的八通道脉冲驱动器的电气和声学性能。该驱动器可以产生 >100 Vpp 的脉冲信号，上升和下降时间分别为 18.6 和 18.5 ns。支持整个系统所需的静态功率小于 3.6 mW，每个通道在激励期间的系统功耗小于 50 mW。输出脉冲信号的二次谐波失真低至-40 dBc，表明集成的多通道脉冲驱动器可用于先进的便携式超声成像系统。
