LOCAL OSCILLATOR LEAKAGE CONTROL IN DIRECT CONVERSION PROCESSES

摘要

A system and method for generating a local oscillator (LO) frequency in a ze ro intermediate frequency (IF) receiver or transmitter is presented. A signal i s received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus , the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.