Title :
Low noise front-end amplifier design for medical ultrasound imaging applications
Author :
Surya Sharma;Trond Ytterdal
Author_Institution :
Department of Electronics and Telecommunication, Norwegian University of Science and Technology, Trondheim, Norway
Abstract :
This paper describes the design of a low-noise amplifier for ultrasound receiver application. The receiver consists of a transimpedance amplifier (TIA) followed by a current feedback amplifier (CFA) and an output buffer stage to drive a 75Ω coaxial cable. The design is optimized in terms of noise and bandwidth for capacitive micromachined ultrasonic transducer (CMUT). Amplifier design issues such as achieving low noise and high linearity along with small input impedance are also discussed. The amplifier is designed using AMS 180nm technology and achieves a noise figure of 3.2dB. The amplifier has an input impedance of 200Ω for bandwidth of 100MHz, dynamic range of 51dB and total harmonic distortion (THD) of less than 0.4% for full scale input.
Keywords :
"Bandwidth","Impedance","Noise figure","Receivers","Ultrasonic imaging","Dynamic range","Transistors"
Conference_Titel :
VLSI and System-on-Chip, 2012 (VLSI-SoC), IEEE/IFIP 20th International Conference on
Print_ISBN :
978-1-4673-2658-2
DOI :
10.1109/VLSI-SoC.2012.7332069
