A fully integrated CMOS low-IF weaver receiver working at L-band for DAB (Digital Audio Broadcasting).The receiver takes use of three methods to enhance the image reject performance.Compared with traditional In-phase and Quadrature (I/Q) structure

double quadrature weaver architecture performs higher image reject.An image-reject Low noise Amplifier (LNA) supplies additional image reject in the whole band.The phase and magnitude calibration circuit in LO buffer improves the quadrature of the LO signals.As a result

the receiver can reject the image signal more than 65dB.The cascade noise figure is 4dB and OIP3 is 22dBm.The receiver is fabricated with 0.25μm TSMC CMOS technology.The core die area is 9mm

2

.It is now under test.