Patent ID: 6819913
Filing Date: 2004-11-16
Classification: H03C

Abstract:
A frequency converter for receiving an input signal having an intermediate frequency and a signal originating from an oscillator and having an oscillation frequency, which frequency converter comprises:a first quadratic module for receiving an output signal from the oscillator and for supplying a first and a second output signal in mutual phase quadrature, both the first and the second output signal having the oscillation frequency as their frequency, a second quadratic module designed for receiving the input signal of the converter and for supplying a first and a second output signal in mutual phase quadrature, both the first and the second output signal having the intermediate frequency as their frequency, a first mixer for supplying an output signal representing a product of the first output signals of the first and second quadratic modules, a second mixer for supplying an output signal representing a product between the second output signals of the first and second quadratic modules, and combination means for recombining the output signals of the first and second mixers, wherein an output signal supplied by the frequency converter has a radio frequency whose value is equal to the absolute value of the difference between the oscillation frequency and the intermediate frequency.