Title :
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
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;
Conference_Titel :
Research in Microelectronics and Electronics 2006, Ph. D.
Conference_Location :
Otranto
Print_ISBN :
1-4244-0157-7
DOI :
10.1109/RME.2006.1689921
