Second order active differential filter

摘要

The filter includes a differential amplifier (10) with two inputs (1,1) and two corresponding outputs (O,O) The inputs and outputs are connected via two identical impedance circuits. A differential signal is applied to two terminals (A,A). Identical resistors (R1) are connected in series between the terminal A and the amplifier input (1). A capacitor (C1) is provided between the output (O) and the common node of the two resistors. A similar circuit is provided for the second input and output of the filter.