[IEEE 20th International Conference on VLSI Design held jointly with 6th International Conference on Embedded Systems (VLSID'07) - Bangalore, India (2007.01.6-2007.01.10)] 20th International Conference on VLSI Design held jointly with 6th International Conference on Embedded Systems (VLSID'07) - A 2 GHz Low Power Down-conversion Quadrature Mixer in 0.18-μm CMOS