#$%^&*AU2017201701A120171026.pdf#####ABSTRACT Apparatus, including a multiplexer, having a first output and multiple first inputs receiving analog input signals and an analog feedback signal and cycling through 5 and selecting the signals for transfer in sequential signal groupings to the first output. The apparatus also includes an amplification circuit, having a second output and a second input connected to the multiplexer first output, that amplifies signals corresponding to the 10 analog input signals with a selected gain so as to generate respective amplified analog signals at the second output. Circuitry selects a characteristic of the respective amplified analog signals from an initial signal grouping, feeds the characteristic back for input 15 to the multiplexer as the analog feedback signal, selects a subsequent characteristic of the respective amplified analog signals from a subsequent signal grouping, and adjusts the amplification circuit gain so that the analog feedback signal and the subsequent characteristic have 20 the same amplitude.1 /5 Lo N Z U :DLU 0 ow 0~~ Hj U) co 0 CC LLo (DN
