Title :
A 65nm CMOS front-end LNA for medical ultrasound imaging with feedback employing noise and distortion cancellation
Author :
Eriksrod, J. Havard ; Ytterdal, Trond
Author_Institution :
Dept. of Electron. & Telecommun., Norwegian Univ. of Sci. & Technol. - NTNU, Trondheim, Norway
Abstract :
A 70μW low power front-end Low Noise Amplifier (LNA) for ultrasound applications is proposed. The amplifier utilizes a balun based on a common-gate (CG) and a common-source (CS) combination. The CS-amplifier performs error correction, and thus cancels distortion and noise from the CG-amplifier. The amplifier is optimized towards low noise and low power consumption, and is a capacitive micro machined ultrasonic transducer (CMUT) tailored LNA. The LNA is design and simulated under 65nm CMOS technology, achieving a noise figure (NF) of only 2.98dB with a total power consumption of only 70μW. The amplifier is tuned towards an CMUT impedance of 10k/ -60° at a center of frequency 5MHz, with a input impedance of 3.8kΩ. Moreover, sporting a dynamic range (DR) of 50.53dB.
Keywords :
CMOS integrated circuits; biomedical ultrasonics; capacitive sensors; low noise amplifiers; low-power electronics; micromachining; ultrasonic imaging; ultrasonic transducers; CG-amplifier; CMOS technology; CMUT impedance; CMUT tailored LNA; CS-amplifier; balun; capacitive micromachined ultrasonic transducer; common-gate combination; common-source combination; distortion cancellation; error correction; low power consumption; low power front-end low noise amplifier; noise figure; noise figure 2.98 dB; power 70 muW; size 65 nm; ultrasound applications; Gain; Noise; Noise measurement; Power demand; Thermal noise; Transistors; Ultrasonic imaging;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2013 European Conference on
Conference_Location :
Dresden
DOI :
10.1109/ECCTD.2013.6662292
