A low-noise low-pass amplifier channel designed for telecommunications is described. The channel has an 80-kHz corner frequency and total dynamic range of 94 dB. To achieve the high dynamic range, the amplifier channel is constructed with a BiCMOS process and a relative high supply voltage of ±8V is used. To further increase the dynamic range, the baseband amplifier has two branches, a low gain (A = 29 dB) and a high gain (A = 73 dB) branch, comprising a common continuous-time preamplifier and separate antialias filters, switchedcapacitor filters, and postamplifiers. Differential signal processing is used to reduce the effect of common-mode disturbances.