Title :
Low-Power Quadrature Receivers for ZigBee (IEEE 802.15.4) Applications
Author :
Tedeschi, Marika ; Liscidini, Antonio ; Castello, Rinaldo
Author_Institution :
Dept. of Electron., Univ. of Pavia, Pavia, Italy
Abstract :
Two very compact and low power quadrature receivers for ZigBee applications are presented. Area and power savings are obtained through both current reuse and oscillator tank sharing between the I and Q paths. Since this choice can cause I and Q amplitude/phase mismatches, the conversion gain is analyzed and a technique to minimize these errors is implemented. Moreover, since using a single tank makes quadrature generation at the local oscillator level costly and power-hungry, two alternative quadrature generation techniques in the RF path are proposed, together with the corresponding input matching strategies.
Keywords :
CMOS integrated circuits; low noise amplifiers; personal area networks; radio receivers; CMOS receiver prototypes; IEEE 802.15.4; LC tank; LNA; ZigBee applications; area savings; base band variable gain complex filter; channel selection; current reuse; high quality factor bond-wire inductors; image rejection; integrated inductor; local oscillator; low-IF architecture; low-power quadrature receivers; oscillator tank sharing; power savings; quadrature generation techniques; self-oscillating mixer; Impedance; Inductors; Mixers; Oscillators; Radio frequency; Receivers; Zigbee; Current reuse; LC-tank oscillator; RF receiver; ZigBee receiver; low power; low voltage; low-IF architecture; self-oscillating mixer (SOM);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2010.2053861
