Design Of Sub 1V CMOS Mixer Based On Bulk-driven MOS Technology

Wireless communication booms these years, which demands an increase in transceivers which have low power consumption, low cost and good reliability. So intensive research on monolithic integrated transceivers has become very hot all over The world, especially its key technique: radio frequency integrated circuits (RFIC). With the advancement of CMOS fabrication processes, it is possible to use the CMOS technology to design radio frequency integrated circuits, which are traditionally implemented in more expensive technologies such as bipolar or Gallium Arsenide.This thesis regards mixers as the research object. The author first gives a thorough analysis of most kinds of receivers, and puts forward a suitable low-IF image frequency rejection architecture for Bluetooth application.Then an improved CMOS Gilbert double-balanced mixer topology based on bulk-driven is chosen by comparison of several kinds of mixer topologies in common use. Using Hspice simulator and BSIM3V3 models for TSMC 0.25μm CMOS process, the mixer was simulated. The simulation result shows that the mixer can work properly at 2.4GHz frequency with a single power supply of 0.8V. The conversion gain of this mixer is -8.5dB, and the Third-order Input Intercept Point (IIP3) is 28.4dB.The author analyses the linearity of Gilbert topology based on principle of Volttera. Using ADS simulator and BSIM3V3 models for TSMC 0.25μm CMOS process, the OIP3 of the transconductance is simulated, and the simulation result and ideal value is compared with.