Patent ID: 8669783

Claim:
An interface device ( 16 ), which can be connected between two electronic components ( 12 , 14 ) of an electronic circuit ( 10 ) and comprising: an input terminal ( 17 ; 74 ; 90 ), an output terminal ( 18 ; 76 ; 92 ) and a reference terminal ( 19 ; 77 ; 93 ), the device ( 16 ) having an input voltage between the reference terminal and the input terminal, an output voltage between the reference terminal and the output terminal, an input impedance, and an output voltage gain, at least one resistance ( 22 , 24 ; 78 , 82 , 84 ; 94 , 98 , 104 ) connected to at least one terminal among the input terminal and the output terminal, at least one analog switch ( 26 ; 26 B) positioned between the output terminal and the reference terminal, the switch having a closed state or an open state, and control means ( 62 , 64 ; 66 , 67 , 68 ) for the or each switch ( 26 ; 26 B), at least one parameter among the input impedance and the output voltage gain of the device ( 16 ) having distinct values as a function of whether the analog switch is closed or open ( 26 ; 26 B), characterized in that the or each analog switch ( 26 ; 26 B) comprises at least one N-type field effect controllable transistor ( 38 ; 50 , 54 ) and one P-type field effect controllable transistor ( 40 ; 52 ) connected in series.