Patent ID: 9685864
Date: 2017-06-20
CPC Classifications: H02M,H03F

Claim:
1. A circuit comprising: a switching regulator, the switching regulator receiving a switching signal having a switching frequency; a monitor circuit configured to monitor the switching frequency; and a reconfigurable inductance coupled to an output of the switching regulator, wherein the monitor circuit is configured to change the reconfigurable inductance between a plurality of inductance values based at least on the switching frequency; an amplifier configured to receive an envelope tracking signal, wherein an output of the amplifier is coupled to an output of the switching regulator to provide a power supply voltage; and a switching generator circuit configured to produce the switching signal based on the envelope tracking signal, wherein the monitor circuit is further configured to compare a frequency of the envelope tracking signal to the switching frequency of the switching signal, and in accordance therewith, change the reconfigurable inductance.