A CMOS Low Loss / High Linearity Passive Mixer for 2.45 GHz Low Power Applications

Manuel Camus (1) , Benoit Butaye (2) , Christophe Viallon (3) , Luc Garcia (2) , Thierry Parra (3)

1 ST-GRENOBLE - STMicroelectronics [Grenoble]
2 ST-Ericsson [Le Mans]
3 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications

A fully integrated passive mixer suitable for 2.45 GHz low consumption and low cost applications is proposed and demonstrated in a 90 nm CMOS technology. An original operating principle is adopted which is based on the use of a local oscillator square signal exhibiting a duty cycle less than 1/4. By using such a LO driving, the mixer operates as a sampler and can theoretically achieve a voltage conversion gain of 0 dB. This mixer has been integrated in a complete monolithic receiver. According to simulations, measurements demonstrate improvements of 5 dB on gain and 3 dB on noise figure without any linearity degradation and any additional cost, when compared to a common LO driving of 1/2 duty cycle.

Mots clés: Low-IF receiver; Zigbee receiver; passive mixer; switched mixer; sampling mixer

Domaines: Electronique

Manuel Camus, Benoit Butaye, Christophe Viallon, Luc Garcia, Thierry Parra. A CMOS Low Loss / High Linearity Passive Mixer for 2.45 GHz Low Power Applications. 2012 Asia Pacific Microwave Conference, Dec 2012, Kaohsiung, Taiwan. p1 - 3, ⟨10.1109/APMC.2012.6421533⟩. ⟨hal-00783042⟩