Variable attenuation system having continuous input steering

摘要

A variable attenuation system includes a steering core that continuously steers a signal to an attenuator having multiple inputs. An embodiment having an attenuator constructed from discrete components continuously interpolates a signal between the individual inputs of the attenuator. Continuous interpolation between discrete inputs can also be used with attenuators having continuous structures. A fully integrated embodiment achieves continuous input steering by moving a carrier domain along a continuous attenuator. A separate output stage utilizes adaptive biasing to reduce unnecessary current consumption.