An amplifier circuit having an improved inter-stage matching network and improved performance. In one embodiment, an RF signal source having an output impedance ZSOURCE is approximately impedance matched through an inductive tuning circuit to a power amplifier having an input impedance ZPA. The inductive tuning circuit includes a tunable capacitor element C1 and inductive elements L1, L2, which may be fabricated as stacked conductor coils. Since the capacitance of C1 is tunable, impedance matching is available over a broad range of RF frequencies. Also provided are DC isolation between the RF signal source and the power amplifier, coupling of a voltage source to the output of the RF signal source through L1, and coupling of a bias voltage to the input of the power amplifier through L2.