Title :
A CMOS linear-in-dB variable gain amplifier for low power read channel front-end
Author :
Liu, Xiong ; Willson, Alan N., Jr.
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA
Abstract :
A linear-in-dB CMOS variable gain amplifier (VGA) targeting a low power read channel front-end is presented. Biased with a less than 2 mA current, this VGA provides 6-18 dB amplification and more than 700 MHz 3-dB bandwidth with less than -45 dB THD in 0.18-mum CMOS. In addition, the 6-18 dB gain is continuously tunable by adjusting the bias current. With such a performance trade-off, it is well suited for mobile storage applications.
Keywords :
CMOS analogue integrated circuits; amplifiers; low-power electronics; CMOS linear-in-dB variable gain amplifier; bias current; gain 6 dB to 18 dB; low power read channel front-end; mobile storage applications; size 0.18 mum; Bandwidth; CMOS process; Dynamic range; MOSFETs; Measurement; Performance gain; Resistors; Silicon germanium; Temperature; Wireless LAN;
Conference_Titel :
Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on
Conference_Location :
Knoxville, TN
Print_ISBN :
978-1-4244-2166-4
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2008.4616750
