Abstract: An analogue amplifier circuit has a gain stage comprising two differential operational amplifers (17, 18) and an error correction stage comprising two differential operational amplifiers (20, 21) each connected with its inputs across the inputs of a respective gain stage amplifier and its output connected to the non-inverting input of the other gain stage amplifier. A balanced output from the outputs of the two gain stage amplifiers (17, 18) may be provided or these two outputs may be fed to a final stage amplifier (22) to provide a single output.