Patent ID: 7308243

Claim:
A mixer arrangement comprising: a first mixer having first signal input configured to receive a first signal including a frequency of which is to be changed, a second signal input configured to receive a second signal including an inverse of the first signal, first frequency input configured to receive an input frequency, a second frequency input configured to receive an inverse of the input frequency, a first output, and a second output, said first mixer being configured to mix the first signal with the first input frequency to provide an output which is output by said first output and said first mixer being configured to mix the second signal with the second input frequency to provide an output which is output by said second output; and a second mixer having at least one frequency input configured to receive the input frequency and having at least one output, wherein the first output of the first mixer and at least one output of said second mixer being combined to cancel unwanted components in the outputs of said mixers, and wherein said unwanted components comprise said input frequency.