Title :
An integrated baseband VGA with temperature compensation and linear-in dB gain control
Author :
Yang, Lijun ; Jian, Haifang ; Shi, Yin ; Chen, Zhiming
Author_Institution :
Dept. of Electron. Eng., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
This paper presents the design and simulated results of a baseband variable-gain-amplifier (VGA) with temperature compensation and linear-in dB gain control used in a direct conversion DVB-S tuner system. Temperature compensation and decibel-linear characteristic are achieved by means of a control circuit which provides a lower than +/-0.5 dB gain error over the full 0degC to 100degC temperature range and -10 dB~6 dB gain range. The VGA core adopts a novel linearized transconductor topology, and the IIP3 of the VGA is 32.5 dBv at 3 dB gain. The device is fabricated in a 0.35-mum SiGe BiCMOS technology and drains 13 mA from a 3.3-V power supply.
Keywords :
amplification; amplifiers; compensation; digital video broadcasting; gain control; DVB-S tuner system; current 13 mA; decibel-linear characteristic; gain 3 dB; integrated baseband VGA; linear-in dB gain control; size 0.35 mum; temperature 0 degC to 100 degC; temperature compensation; variable-gain-amplifier; voltage 3.3 V; Baseband; Circuit simulation; Circuit topology; Digital video broadcasting; Error correction; Gain control; Temperature control; Temperature distribution; Transconductors; Tuners;
Conference_Titel :
Physical and Failure Analysis of Integrated Circuits, 2009. IPFA 2009. 16th IEEE International Symposium on the
Conference_Location :
Suzhou, Jiangsu
Print_ISBN :
978-1-4244-3911-9
Electronic_ISBN :
1946-1542
DOI :
10.1109/IPFA.2009.5232592
