摘要(英) |
In recent years, the global aging has driven the development of the therapeutic and auxiliary medical device market, especially the use of home care, such as blood glucose meters, blood pressure monitors, etc. Therefore, it is very important to develop care equipment with mobility, miniaturization, and low power consumption.
This paper presents the design of the probe driving circuit in Doppler ultrasound system for blood flow sensing, which is an operational- transconductance-amplifier(OTA) with high current, high linearity, and low power consumption. Three circuit architectures are presented, namely conventional OTA architecture, complementary OTA architecture, and OTA with slew rate enhancer. The circuits in this paper are designed and implemented with an integrated circuit. They were fabricated in VIS 0.5μm SOI 2P4M 5V CMOS process. The supply voltage is 5V, and the load capacitor is 2nF. The area of complementary OTA architecture is 850*560μm2. The area of OTA with slew rate enhancer is 812.5*532.07μm2. The IC measurement achieves 5MHz sine wave signal and 10MHz sine wave signal, respectively. The slew-rate is 68V/μs and 100V/μs, and the static power consumption is 140mW and 48mW, respectively.
For the large capacitive load of ultrasound probes, using the architectures proposed in this paper to drive can reduce the overall system power consumption. The development of miniaturized, wearable or mobile medical products for battery-powered can extend the life cycle, and the stability can be greatly improved. |
參考文獻 |
[1] CNNMoney : the ′super-aged′ nation. 取自http://money.cnn.com/interactive/news/aging-countries/?iid=EL。
[2] 凱基投信:全球醫材商機,比你想的還要大。2017年4月5日,取自https://www. kgifund.com.tw/edm_rwd/20170405.html。
[3] John M. Reid, “Doppler Ultrasound,” IEEE Engineering in Medicine and Biology Magazine, Vol. 6, no. 4, pp.14-17, Dec. 1987.
[4] 詠業科技:壓電技術介紹。取自https://www.unictron.com/%E6%8A%80%E8%A1% 93%E8%B3%87%E6%96%99/%E5%A3%93%E9%9B%BB%E6%8A%80%E8%A1%93%E4%BB%8B%E7%B4%B9/。
[5] 白富升,黃慶連,林家宏,薛儒鴻,「壓電陶瓷共振系統之設計與實現」,中華民國第三十一屆電力工程研討會,2160-2164頁,台南市,中華民國,2010年12月。
[6] K.-C. Lee, and C. Hsia, “Design of Combined PWM/PFM Controlled Boost Converter for Pulsed Doppler Ultrasound Transmitters,” 2018 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW), pp. 315-316, Taichung, Taiwan, May 2018.
[7] K.-C. Lee, and C. Hsia, “An Integrated High-slew-rate Low Power OTA Design for Doppler Ultrasound Transmitters,” 2017 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW), pp. 29-30, Taipei, Taiwan, June 2017.
[8] Behzad Razavi, 類比CMOS積體電路設計,李泰成譯,修訂版,東華書局,台北市,民國103年。
[9] Paul R. Gray, Paul J. Hurst, Stephen H. Lewis and Robert G. Meyer, ANALYSIS AND DESIGN OF ANALOG INTEGRATED CIRCUITS, Fifth edition, John Wiley & Sons, Inc., United States of America, 2009.
[10] 羅姆半導體:迴轉率介紹說明。取自https://www.rohm.com.tw/electronics-basics /opamps/op_what5。
[11] C.-W. Lu, and C.-L. Lee, “A low power high speed class-AB buffer amplifier for flat panel display application,” IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 10, no. 2, pp. 163-168, Apr. 2002.
[12] H.-b. Le, X.-d. Do and S.-g. Lee, “Compact low-power high-slew-rate buffer for LCD driver applications,” IET Electronics Letters, Vol. 46, no. 20, pp.1370-1371, Sep. 2010.
[13] Mohammad Amayreh, Joachim Leicht, and Yiannos Manoli, “A 200ns settling time fully integrated low power LDO regulator with comparators as transient enhancement,” 2016 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 494-497, Montreal, Canada, May 2016.
[14] J. Perez-Bailon, A. Marquez, B. Calvo, N. Medrano, and P.A. Martinez, “Fast-transient high-performance 0.18 μm CMOS LDO for battery-powered systems,” IET Electronics Letters, Vol. 53, no 8, pp.551-552, Apr. 2017.
[15] P.-J. Liu, J.-S. Hong, and J.-M. Wang, “A fast-transient buffer with voltage booting technique for LCD column drivers,” 2014 International Conference on Information Science, Electronics and Electrical Engineering, pp.535-539, Sapporo, Japan, Apr. 2014. |