Title :
Low 1/f noise CMOS active mixers for direct conversion
Author :
Manstretta, Danilo ; Castello, Rinaldo ; Svelto, Francesco
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
9/1/2001 12:00:00 AM
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 shunted together form the input stage. A 0.35-μm 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-dBm IIP2 with 6 mA from 2.7-V supply
Keywords :
1/f noise; CMOS analogue integrated circuits; UHF integrated circuits; UHF mixers; flicker noise; integrated circuit design; integrated circuit noise; nonlinear network analysis; nonlinear network synthesis; 0.35 micron; 1/f noise; 100 Hz to 3 kHz; 18 dB; 2.7 V; 6 mA; 900 MHz; CMOS active mixers; Gilbert cell mixer; RFIC; ReFlex standard; analog integrated circuits; direct conversion; flicker noise; frequency conversion; input stage; low 1/f active mixers; low biasing current; nMOS transconductors; noise analysis; pMOS transconductors; switching stage pMOS devices; Active noise reduction; Amplitude modulation; Image converters; MOS devices; Mixers; Noise measurement; Performance gain; Prototypes; Radio frequency; Transceivers;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
