A circuit that includes a Darlington transistor pair having an input transistor and an output transistor configured to generate an output signal at an output node in response to an input signal received through the input node is disclosed. The circuit has a resistor-inductor-capacitor (RLC) type frequency bias feedback network communicatively coupled between the output transistor and the input node for providing biasing to the Darlington transistor pair as well as for adjusting at least one characteristic of an amplified version of the input signal that passes through the input transistor and into the frequency bias network. The circuit further includes a feedback coupling network coupled between the output node and the input node for feeding back to the input node a portion of the amplified version of the input signal that passes through the input transistor.