Title :
Digitally Controlled VGA for Low Power Low-IF Receivers
Author :
Krcmar, M. ; Subramanian, Venkatachalam ; Boeck, G. ; Spiegel, S.
Author_Institution :
Microwave Eng. Lab., Berlin Inst. of Technol., Berlin
Abstract :
A digitally controlled variable gain amplifier (VGA) for low power, low-IF receivers is presented. The amplifier was designed and fabricated in IBM 7WL BiCMOS 180 nm technology. It shows a dynamic range of 45 dB with a maximum gain of 52 dB and a minimum gain of 7 dB. The gain variation is achieved by means of switched feedback resistors. These are controlled by a demultiplexer and 4 control bits. The 1 dB compression corresponds to 9 dBm of input power in a 50 Omega system and the 3-dB-bandwith is approximately 10 MHz. The overall power consumption is 13 mW.
Keywords :
CMOS integrated circuits; amplifiers; integrated circuit design; receivers; demultiplexer; digitally controlled variable gain amplifier; low power low-IF receivers; power 13 mW; switched feedback resistors; 1f noise; Automatic control; Circuits; Digital control; Dynamic range; Feedback; Feeds; Gain; Resistors; Voltage; CMFB; CMOS; dynamic range; low IF; variable gain;
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
DOI :
10.1109/GEMIC.2009.4815887
