SIGNALPROZESSOR MIT EINEM FREQUENZUMRICHTER

A signal processor includes a frequency converter of the multiphase type. A first phase mixer (SWC1, TIS1) has a pair of switches (M11, M12). A second phase mixer (SWC2, TIS2) also has a pair of switches (M21, M22). The pair of switches of the first phase mixer and the pair of switches of the second phase mixer have a joint common switch node (CN1). A local oscillator generates an individual mixer driver signal (MD1+, MD1−, MDQ+, MDQ−) for each switch (M11, M12, M21, M22) in the aforementioned pairs. Each individual mixer driver signal comprises periodically occurring pulses, which are phase shifted with respect to the periodically occurring pulses in the other individual mixer driver signals. Preferably, there is substantially no overlap between the periodically occurring pulses in the individual mixer driver signals.