Patent ID: 8054208

Claim:
An interface circuit re-configurable to perform a plurality of interface functions, the circuit comprising: one or more configurable input signal paths; a first amplifier having at least a non-inverting input, the first amplifier being configured to receive one of a differential signal and a single ended signal via the one or more configurable input signal paths; a configurable impedance network having an input, the input of the configurable impedance network being switchably coupled to the non-inverting input of the first amplifier; a second amplifier having a non-inverting input and an output, the non-inverting input of the second amplifier being switchably coupled to the input of the configurable impedance network; and a third amplifier having an input and an output, the input of the third amplifier being switchably coupled to the output of the second amplifier, and the output of the third amplifier being coupled to the one or more input signal paths to the first amplifier.