Patent ID: 8494475

Claim:
A mixer device with transistor and sample-and-hold module for signals with high dynamic range, comprising: a transposition device T 1 designed to transpose a radiofrequency signal into baseband, said radiofrequency signal RF consisting of a useful signal Su and jamming signals, four transistors, Q 1 , Q 2 , Q 3 , and Q 4 , an output ST 1 of the transposition device being linked to the four transistors Q 1 , Q 2 , Q 3 and Q 4 at the level of the drain D 1 , D 2 , D 3 and D 4 , the gate G 1 , G 2 , G 3 and G 4 of each of the transistors Q 1 , Q 2 , Q 3 and Q 4 being linked to a source S 1 , S 2 , S 3 and S 4 delivering a substantially identical oscillator frequency to each transistor with different phases distributed as follows: phase shift 0° on the gate of the first transistor Q 1 , phase shift of 180° on the gate of the second transistor Q 2 , phase shift of 90° on the gate of the third transistor and phase shift of 270° on the gate of the fourth transistor Q 4 , the frequency value FoL of the oscillator being close to that of the radiofrequency signal to be transposed, each output S 1 , S 2 , S 3 and S 4 of the transistors Q 1 , Q 2 , Q 3 and Q 4 being linked to a first filtering stage EF 1 consisting of a number of networks RiCi, having characteristics designed to filter the signal from the output of the transistors, and a first filtering stage EF 1 having four outputs, each of these outputs is linked to the gate G 5 , G 6 , G 7 and G 8 of a transistor Q 5 , Q 6 , Q 7 and Q 8 belonging to a second filtering stage EF 2 , the transistors being coupled in pairs at the level of their sources S 5 , S 6 , S 7 , S 8 , a source of a first transistor of a pair being linked to the source of a second transistor, or the output of each transistor Q 5 , Q 6 , Q 7 and Q 8 being loaded with a circuit LiCi, wherein two outputs of the second filtering stage EF 2 whose signals are phase-shifted by 180° are linked to the two inputs of a first differential amplifier U 1 and a second differential amplifier U 2 , the output SU 1 of the first differential amplifier is linked to a third filtering stage and the output SU 2 of the second differential amplifier is linked to the third filtering stage consisting of two LC bridges, and the two filtered signals are then transmitted respectively to an analog-digital converter ADC 1 , ADC 2 .