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A 2.5mW inductorless wideband VGA with dual feedback DC-offset correction in 90nm CMOS technology

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5 Author(s)
Yanjie Wang ; Berkeley Wireless Res. Center, Univ. of California, Berkeley, CA ; Afshar, B. ; Tuan-Yi Cheng ; Gaudet, V.
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A low power inductorless wideband variable gain control amplifier (VGA) for baseband receivers has been designed in a standard digital 90 nm CMOS technology. The VGA was implemented using four-stage modified Cherry-Hooper amplifier with a dual feedback DC-offset canceling network, which simultaneously corrects DC offsets and extends bandwidth without a peaking inductor resulting in saving the chip space significantly. The proposed VGA has been measured using on-chip probing and achieves a 3-dB bandwidth of more than 2.2 GHz with 60 dB gain tuning range. It consumes 2.5 mW through a 1V supply (excluding the output buffer), and occupies only 0.01 mm2 active area.

Published in:

Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE

Date of Conference:

June 17 2008-April 17 2008

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