Patent ID: 6853690

Claim:
A method of up-converting a baseband signal, comprising the steps of: (1) receiving a baseband signal and an inverted baseband signal; (2) adding a common reference voltage to the baseband signal and the inverted baseband signal, to generate a first combined signal and a second combined signal, respectively; (2) shunting said first combined signal to ground according to a first control signal to generate a first harmonically rich signal; (3) shunting said second combined signal to ground according to said second control signal to generate a second harmonically rich signal, wherein said second control signal is phase shifted approximately 180 degrees relative to said first control signal so that second combined signal is not shunted to ground simultaneous with said first combined signal; and (4) combining said first harmonically rich signal and said second harmonically rich signal to generate a third harmonically rich signal having harmonic images that are representative of said baseband signal; wherein said pulses of said first and second control signals have a pulse width of T A , and wherein an amplitude of said harmonics in said third harmonically rich signal are based on n*(T A /T S ), where T S is a period of said first and second control signal, and n is a harmonic number of said harmonic.