Title :
A precise temperature-insensitive and linear-in-dB variable gain amplifier
Author :
Beck, Sungho ; Hwang, Myung-Woon ; Lee, Sang-Hoon ; Cho, Gyu-Hyeong ; Lee, Jong-Ryul
Author_Institution :
Future Commun. IC Inc, Kyunggi-Do, South Korea
Abstract :
A fully temperature-compensated linear-in-dB variable gain amplifier (VGA) is presented. The VGA achieves wide dynamic range and precise linear-in-dB control capability using a translinear current amplifier. The compensation technique having current proportional to the squared temperature is proposed. The VGA is implemented with 0.35 μm SiGe BiCMOS process. Greater than 90 dB dynamic range while having only ±3 dB gain drift from -30°C to 85°C temperature range is measured.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; amplifiers; compensation; gain control; semiconductor materials; -30 to 85 degC; 0.35 micron; SiGe; SiGe BiCMOS process; dynamic range; linear-in-dB gain control; temperature compensation; translinear current amplifier; variable gain amplifier; Circuits; Cities and towns; Communication system control; Dynamic range; Equations; Gain; Temperature control; Temperature dependence; Temperature distribution; Temperature measurement;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205556
