I. Introduction
In recent years, TV tuners became increasingly integrated. There are several standards for DTV in existence throughout the world, such as DVB-C(100M∼1000MHz bandwidth in China), DVB-T (450M∼850MHz) and DVB-S(975M∼ 2175MHz). These systems all demand a wide-band low-noise amplifier (LNA). This has brought a new challenge to the RFIC designer.