Patent ID: 7088168
Filing Date: 2006-08-08
Classification: H03D,H04B

Abstract:
1. A direct conversion receiver, comprising: a band pass filter being configured to filter a predetermined band of received signal; a low noise amplifier being configured to amplify the signal passing said band pass filter; an active mixer being configured to mix the signal outputted from said low noise amplifier with a local oscillating signal and outputting a scalar base-band signal, said active mixer being embodied with a vertical BJT embodied in a three layers-well CMOS process having a deep n-well; and a base-band analog circuit being configured to filter base-band signal outputted from said active mixer and amplifying the signal, said vertical BJT having an emitter formed in an n+ source-drain process of said CMOS process, a base formed in a p-well of said CMOS process and a p+ source-drain diffusion, and a collector formed in said deep n-well of said CMOS process, an n-well, and an n+ source-drain diffusion.