The analysis of direct conversion CMOS active mixers tailored to ReFlex standard is presented. To minimize 1/f noise, the switching stage pMOS devices have large area, low biasing current. pMOS and nMOS transconductors shunt together form the input stage. A 0.35- m prototype performs at 900 MHz as follows: 18 dB SSB NF averaged in the 100 Hz–3 kHz band, 18 dB gain, 4-dBm IIP3, 30-dBmIIP2 with 6 mA from 2.7-V supply.
Low 1/f noise CMOS active mixers for direct conversion
MANSTRETTA, DANILO;CASTELLO, RINALDO;SVELTO, FRANCESCO
2001-01-01
Abstract
The analysis of direct conversion CMOS active mixers tailored to ReFlex standard is presented. To minimize 1/f noise, the switching stage pMOS devices have large area, low biasing current. pMOS and nMOS transconductors shunt together form the input stage. A 0.35- m prototype performs at 900 MHz as follows: 18 dB SSB NF averaged in the 100 Hz–3 kHz band, 18 dB gain, 4-dBm IIP3, 30-dBmIIP2 with 6 mA from 2.7-V supply.File in questo prodotto:
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