A configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit comprises a degeneration inductance stage whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit comprises a common-gate low noise amplifier stage whereby the low noise amplifier circuit operates as a common-gate low noise amplifier. The second topology comprises one or more internal input impedance matching components and the first topology does not comprise the one or more internal input impedance matching components.