Patent ID: 7522899

Claim:
A mixer, comprising: an in-phase mixer branch, forming an in-phase version of a complex signal, and a quadrature mixer branch maintaining a quadrature version of the same said complex signal, one of said branches including a phase rotator which rotates a first portion of said signal relative to a second portion of said signal, wherein one of said first and second portions represents a desired portion of the signal and the other of said first and second portions represents an image portion of the signal; first and second adders, where the first adder obtains a difference between said in-phase and quadrature signals to obtain a first signal which is primarily based on said first portion, and the second adder obtains a sum between said in-phase and quadrature signals to obtain a second signal which is primarily based on the second portion; and a compensation part which uses one of said first and second signals to compensate the other of said first and second signals.