A 0.23mm2 free coil ZigBee receiver based on a bond-wire self-oscillating mixer

A low-IF very compact low power quadrature receiver for ZigBee applications is presented. The receiver saves area and power with a quadrature self oscillating mixer based on high Q bond-wire inductors. The prototype, integrated in CMOS 90 nm, provides 76 dB of maximum voltage gain, with a 10 dB noise figure, an IIP3 of -13 dBm and a phase noise of -124 dBc/Hz @ 3.5 MHz with an active area of only 0.23 mm² and a power consumption of 3.6 mW (including the baseband complex filter).