DocumentCode :
2778972
Title :
Low power CMOS fully differential variable-gain amplifier
Author :
Spiridon, S. ; Eynde, F. Op´t
Author_Institution :
AsicAhead International SRL, Bucharest
Volume :
2
fYear :
2005
fDate :
5-5 Oct. 2005
Firstpage :
383
Abstract :
This paper presents the design, analyses and measurement results of a fast differential variable-gain amplifier (VGA) intended for high-speed data streaming applications such as the IEEE 802.11a wireless LAN. The circuit is a seven stage amplifier that offers a programmable gain in the 0divide84 dB range, in 6 dB steps. Each stage has a programmable gain of either 6 dB or 12 dB. Fully differential low power opamps are used. With an opamp gain-bandwidth product (GBW) of about 200 MHz, the input frequency can go as high as 10 MHz. Offset filtering is possible with a high pass filter with programmable 3 dB frequency. The circuit operates at only 2.5 V, making it an ideal choice for low-power mobile applications. The VGA is fabricated in a 0.13 mum standard analog CMOS technology. It occupies 0.18 mm2 and the typical power dissipation is about 7.5 mW
Keywords :
CMOS integrated circuits; amplification; differential amplifiers; high-pass filters; integrated circuit design; low-power electronics; operational amplifiers; power amplifiers; differential low power opamps; high pass filter; high speed data streaming applications; low-power mobile applications; opamp gain-bandwidth; power CMOS fully differential variable-gain amplifier; power dissipation; programmable gain; standard analog CMOS technology; CMOS technology; Capacitance; Circuits; Differential amplifiers; Energy consumption; Feedback; Filtering; Frequency; Low pass filters; Wireless LAN;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Semiconductor Conference, 2005. CAS 2005 Proceedings. 2005 International
Conference_Location :
Sinaia
Print_ISBN :
0-7803-9214-0
Type :
conf
DOI :
10.1109/SMICND.2005.1558806
Filename :
1558806
Link To Document :
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