PROGRAMMABLE INPUT VOLTAGE AND / OR IMPEDANCE INTERFACING DEVICE COMPRISING AN ANALOGUE SWITCH COMPRISING N-TYPE FIELD-EFFECT FIELD-TYPE TRANSISTORS CONNECTED IN SERIES

摘要

This interface device (16) adapted to be connected between two electronic components of an electronic circuit and comprising: - an input terminal (17), an output terminal (18) and a reference terminal (19) , 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 a voltage gain in output, - at least one resistor (22, 24) connected to at least one of the input terminal (17) and the output terminal (18), - at least one analog switch (26) disposed between the terminal of output (18) and the reference terminal (19), the switch (26) having a closed state or an open state, and - control means of the or each switch (26), at least one parameter among the input impedance and voltage gain at the output of the device (16) having distinct values depending on the state closed or open of the analog switch (26), is characterized in that the or each analog switch (26) comprises at least one N-type field effect controllable transistor and a P-type controllable field effect transistor connected serial.