Common Source Amplifier with Feedback Biasing in 9Onm CMOS

Author

Singh, Tajeshwar ; Sasther, T. ; Ytterdal, Trond

Author_Institution

Dept. of Electron. & Telecommun., Norwegian Univ. of Sci. & Technol., Trondheim

fYear

0

fDate

0-0 0

Firstpage

161

Lastpage

164

Abstract

Design of a high-frequency common source (CS) amplifier in 90nm CMOS suitable for use with high impedance sources is presented. High impedance sources pose challenges on the biasing of voltage amplifiers where maintaining high input impedance is necessary. To remedy this, a feedback biasing scheme is proposed. The amplifier is developed for a capacitive micromachined ultrasonic transducer (CMUT) based ultrasound system for intravenous medical imaging with a center-frequency of 100MHz and 100% bandwidth (passband: 50MHz-150MHz). The proposed amplifier achieves a voltage gain of 31.4dB, and when interfaced with the CMUT: a noise figure of 0.32dB, an SNR of 35.2dB, and THD of -35dB, while drawing 460muA from a 1V power supply

Keywords

CMOS analogue integrated circuits; VHF amplifiers; biomedical ultrasonics; capacitive sensors; circuit feedback; ultrasonic transducers; 0.32 dB; 1 V; 100 MHz; 31.4 dB; 460 muA; 50 to 150 MHz; 90 nm; CMOS integrated circuits; capacitive micromachined ultrasonic transducer; common source amplifier; feedback biasing; high impedance sources; intravenous medical imaging; ultrasound system; voltage amplifiers; Bandwidth; Biomedical imaging; Feedback; Impedance; Noise figure; Passband; Power amplifiers; Ultrasonic imaging; Ultrasonic transducers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Research in Microelectronics and Electronics 2006, Ph. D.

Conference_Location

Otranto

Print_ISBN

1-4244-0157-7

Type

conf

DOI

10.1109/RME.2006.1689921

Filename

1689921