Patent ID: 8405452

Claim:
A filtering arrangement comprising: a reference voltage input; a first and a second current source each having a control input coupled to the current output; a first and a second filter input; a first transistor with a first connection, a second connection and a control connection, where its first connection is coupled to the first current source and its second connection is coupled to the first filter input through a first resistor; a second transistor with a first connection, a second connection and a control connection, where its first connection is coupled to the second current source, its second connection is coupled to the second filter input through a second resistor and its control connection is coupled to its first connection and to the control connection of the first transistor; a compensation current arrangement coupled to the reference voltage input and configured to provide a control current at a current output as a function of a voltage at the reference voltage input and as a function of a compensation current having opposite variations in value in comparison to variations in value of a product of a resistance between the first and second connections of the first transistor and a capacitance of the capacitive element; a capacitive element coupled between the first connection of the first transistor and the second connection of the second transistor; and a filter output coupled to the first connection of the first transistor.