Title :
A highly linear CMOS amplifier for Variable Gain Amplifier applications
Author :
Tang, Yonghui ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
This paper reports the design of a highly-linear CMOS amplifier for Variable Gain Amplifier (VGA) applications. A better than -60 dB 3rd harmonic distortion at differential output level of 1 V peak-to-peak is obtained by utilizing a linearization scheme that does not rely on the active devices. The amplifier maintains 3 dB bandwidth over 300 MHz. A noise figure at 8.6 dB is obtained with source impedance of 200 ohms. It is implemented in standard CMOS 0.25 u process and consumes 40 mA current under 3.3 V power supply.
Keywords :
CMOS analogue integrated circuits; differential amplifiers; harmonic distortion; integrated circuit noise; linearisation techniques; 0.25 micron; 3.3 V; 300 MHz; 40 mA; 8.6 dB; active device; harmonic distortion; highly-linear CMOS amplifier; linearization; noise figure; source impedance; variable gain amplifier; Application software; Bandwidth; BiCMOS integrated circuits; CMOS process; Gain; Harmonic distortion; Impedance; Linearity; Signal design; Transconductance;
Conference_Titel :
Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on
Print_ISBN :
0-7803-7523-8
DOI :
10.1109/MWSCAS.2002.1187168
