Amplifier arrangement and method for signal amplification

Abstract

An amplifier arrangement comprises a signal input (Iin+, Iin−) to receive a signal to be amplified, a signal output (Out) to provide an amplified signal, an amplifier stage (AS) coupled between the signal input (Iin+, Iin−) and the signal output (Out), a switchable dynamic biasing stage (DB) with an input coupled to the signal input (Iin+, Iin−), a switchable gain boosting stage (GB) with an input coupled to the signal input (Iin+, Iin−), and a switching device (SD) coupled to the amplifier stage (AS) such that either an output of the switchable dynamic biasing stage (DB) or an output of the switchable gain boosting stage (GB) are coupled to the amplifier stage (AS). In one embodiment, by enabling the switchable dynamic biasing stage (DB) in an initial large-signal phase of amplification and the switchable gain boosting stage (GB) in a latter small-signal phase of amplification by means of the switching device (SD), high gain and low current consumption are simultaneously realised. Furthermore, a method for signal amplification is disclosed.

Dependencies are inferred from the claim text.