Title :
An improved 3 V 2 GHz BiCMOS image reject mixer IC
Author :
Pache, D. ; Fournier, J.M. ; Billiot, G. ; Senn, P.
Author_Institution :
ANACAD EES France, Meylan, France
Abstract :
A 2 GHz BiCMOS image reject mixer is described in this paper. A novel combination of 90° phase shifter networks and a gain control system are used to obtain high image rejection despite local oscillator frequency variation due to channel selection, intermediate frequency (IF) adjustment and process fluctuations. A 35 dB min. image rejection is obtained in a 200 MHz RF bandwidth centered at 2 GHz and a 200 MHz IF. Furthermore, the gain control system allows a 25 dB min. image rejection for IF adjustment from 100 MHz to 300 MHz. The conversion gain of the mixer is 10 dB and the IP3 is -4,5 dBm referenced to the input. The overall current consumption is 15 mA from a +3 V supply. The mixer has been integrated in a front end IC including an antenna preamplifier in a silicon BiCMOS process
Keywords :
BiCMOS analogue integrated circuits; UHF integrated circuits; UHF mixers; UHF phase shifters; gain control; integrated circuit design; mobile radio; transceivers; 10 dB; 15 mA; 2 GHz; 200 MHz; 3 V; BiCMOS; UHF mixers; antenna preamplifier; channel selection; conversion gain; current consumption; front end IC; gain control system; image reject mixer IC; intermediate frequency adjustment; local oscillator frequency variation; phase shifter networks; portable communications transceivers; process fluctuations; Bandwidth; BiCMOS integrated circuits; Fluctuations; Gain control; Image converters; Local oscillators; Phase shifters; Preamplifiers; Radio frequency; Silicon;
Conference_Titel :
Custom Integrated Circuits Conference, 1995., Proceedings of the IEEE 1995
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-2584-2
DOI :
10.1109/CICC.1995.518144
