Patent ID: 7369835

Claim:
An image rejection mixer comprising: an input terminal for receiving an input radio frequency (RF) signal; a first mixer coupled to receive said input RF signal and a signal from a local oscillator, said local oscillator providing a signal having a local oscillator frequency, said first mixer including a first mixer stage and a first output load stage and providing a first output signal; a first phase converter coupled to convert a first phase of said signal from said local oscillator and to generate a phase-converted local oscillator signal; a second mixer coupled to receive said input RF signal and said phase-converted local oscillator signal, said second mixer including a second mixer stage and a second output load stage and providing a second output signal; a first output adjust circuit coupled to said first output load stage of said first mixer for modifying a signal waveform of said first output signal of said first mixer; a second output adjust circuit coupled to said second output load stage of said second mixer for modifying a signal waveform of said second output signal of said second mixer; a second phase converter coupled to convert a second phase of said second output signal of said second mixer and to generate a phase converted output signal; and a combiner coupled to receive said first output signal and said phase converted output signal and combine said first output signal and said phase converted output signal to provide an output signal having an intermediate frequency, wherein said first output adjust circuit and said second output adjust circuit operate to modify signal waveforms of said first output signal and said phase converted output signal so as to cancel nearly all signal components having an image frequency in said output signal having an intermediate frequency.