FULLY-DIFFERENTIATED DIFFERENTIAL AMPLIFIER WITH HIGH INPUT IMPEDANCE

摘要

The invention relates to a circuit with an input voltage (VIN) and an output voltage (VOUT), comprising a fully-differentiated differential amplifier (FDDA) with two differential input pairs (3, 4; 3', 4') and a differential output pair (5, 5').A number of resistances (R3,..., R7, R3',..., R7') are wired in series between the output pair (5, 5') by means of connection nodes. Each input (3, 3') of an input pair may be connected to one of the connection nodes by means of two selector switches (S, S').