"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates" "uuid:c4d099ad-0bb7-4ce6-8731-39b9e20cf153","http://resolver.tudelft.nl/uuid:c4d099ad-0bb7-4ce6-8731-39b9e20cf153","A compact 0.135-mW/channel LNA array for piezoelectric ultrasound transducers","Chen, C. (TU Delft Electronic Instrumentation); Chen, Z. (TU Delft Electronic Instrumentation); Chang, Z.Y. (TU Delft Electronic Instrumentation); Pertijs, M.A.P. (TU Delft Electronic Instrumentation)","Pribyl, W (editor); Dielacher, F (editor); Hueber, G (editor)","2015","This paper presents a power- and area-efficient 9-channel LNA array for piezoelectric ultrasound transducers to enable real-time 3D imaging with miniature endoscopic and catheter-based probes. In view of the relatively low impedance of piezoelectric transducers, the LNA is implemented as a capacitive feedback voltage amplifier, rather than a trans-impedance amplifier, to achieve a better noise-power trade-off. The use of a current-efficient inverter-based OTA with optimized bias scheme and dual-rail regulation further improves the power efficiency of the LNA while keeping the area compact: 0.01 mm2 per channel. Electrical and acoustic measurement results show that the proposed LNA achieves a 0.6 mPa/√Hz input-referred noise at 4 MHz while consuming only 0.135 mW, which represents a noise efficiency 2.5 × better than the state-of-the-art.","Arrays; Noise; Transducers; Ultrasonic imaging; Capacitors; Gain; Imaging","en","conference paper","IEEE Society","","","","","","Campus only","","","","Electronic Instrumentation","","",""