MIXER CIRCUIT WITH IMAGE FREQUENCY REJECTION WHICH IS INTENDED, IN PARTICULAR, FOR AN RF RECEIVER WITH ZERO OR LOW INTERMEDIATE FREQUENCY

摘要

The invention relates to a mixer circuit with image frequency rejection comprising a quadrature phase splitter (30, 30'). Said splitter is provided with an input which is connected to the input (Fi) of the mixer circuit and two outputs which deliver respectively two phase quadrature signals, said signals being applied respectively to two simple mixers (31, 32; 31' 32'). The inventive mixing circuit also comprises a quadrature phase and frequency splitter (33,33') having a frequency division ratio. Said quadrature phase and frequency splitter is provided with two inputs which are connected respectively to the respective outputs of the two simple mixers (31, 32; 31' 32') and a first output which delivers a first output signal (Fo) from the mixer circuit, said signal being applied as an input of the two simple mixers.