A compact 0.135-mW/channel LNA array for piezoelectric ultrasound transducers

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)

2015-11-02

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

http://resolver.tudelft.nl/uuid:c4d099ad-0bb7-4ce6-8731-39b9e20cf153

https://doi.org/10.1109/ESSCIRC.2015.7313913

IEEE, Piscataway, NJ. USA

Campus only

978-1-4673-7470-5

Proceedings of the 41st European Solid-State Circuits Conference, ESSCIRC 2015

ESSCIRC 2015, 2015-09-14 → 2015-09-18, Messe Congress, Graz, Austria

Institutional Repository

conference paper

© 2015 C. Chen, Z. Chen, Z.Y. Chang, M.A.P. Pertijs