Low Flicker-Noise Quadrature Mixer Topology

A mixer topology that improves NF at low offset frequencies by reducing 1/f noise contributions is fabricated in 0.13mum CMOS. The NF at 10kHz is 9dB, which is 9dB less than a conventional mixer. The mixer also has 2dB higher gain, improved quadrature matching, higher IP2, straightforward implemention, and is robust over PVT