ENVELOPE TRACKING SWITCHING HYBRID

摘要

A hybrid envelope tracking system capable of transition between a passive, switching, and/or active mode of operation with minimized parasitic oscillations is presented. The system may include a voltage control circuit comprising first and second node interfaces configured to receive first and second voltages respectively. An input node interface may be configured to receive an input envelope signal. An enablement node interference may be configured to receive an enablement signal, the enablement signal setting a transition between a passive or switching mode of operation to an active mode of operation. The circuit may further include a modulation transistor driven by a single floating operational amplifier. The modulation transistor may be used to modulate a supplied voltage with respect to the received envelope signal during the active operating regime.