Abstract
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.
| Original language | English |
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| Title of host publication | Proceedings of the 41st European Solid-State Circuits Conference, ESSCIRC 2015 |
| Editors | W Pribyl, F Dielacher, G Hueber |
| Place of Publication | Piscataway, NJ. USA |
| Publisher | IEEE Society |
| Pages | 404-407 |
| Number of pages | 4 |
| ISBN (Electronic) | 978-1-4673-7472-9 |
| ISBN (Print) | 978-1-4673-7470-5 |
| DOIs | |
| Publication status | Published - 2 Nov 2015 |
| Event | ESSCIRC 2015: 41th European Solid-State Circuits Conference - Messe Congress, Graz, Austria Duration: 14 Sept 2015 → 18 Sept 2015 Conference number: 41 |
Publication series
| Name | |
|---|---|
| Publisher | IEEE |
Conference
| Conference | ESSCIRC 2015 |
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| Abbreviated title | ESSCIRC |
| Country/Territory | Austria |
| City | Graz |
| Period | 14/09/15 → 18/09/15 |
Keywords
- Arrays
- Noise
- Transducers
- Ultrasonic imaging
- Capacitors
- Gain
- Imaging