Integrated Power Supply And Modulator For Radio Frequency Power Amplifiers

摘要

An integrated power supply and modulator system includes three subsystems: a magnetic regulation stage, a switched-capacitor voltage balancer stage, and at least one output switching stage. In one embodiment, the integrated power supply and modulator system further includes startup circuitry, feedback/feedforward circuitry, and control circuitry.

主权项

1. An integrated power supply and modulator system comprising:
a magnetic regulation stage having an input to receive an input voltage and at least one output to deliver a regulated output voltage; a switched-capacitor voltage balancer stage having a plurality of voltage nodes to carry corresponding generated voltages, at least one of the plurality of voltage nodes being coupled to an output of the magnetic regulation stage, wherein the switched-capacitor voltage balancer stage is configured to maintain a substantially ratiometric set of voltages on the plurality of voltage nodes with respect to a reference potential; and an output switching stage to selectively couple at least two voltages from the plurality of voltage nodes of the switched-capacitor voltage balancer stage to an output of the output switching stage in response to one or more control signals; wherein the magnetic regulation stage includes:
an inductor having a first end and a second end; anda set of at least at least two switches to selectively couple at least one of the first and second ends of the inductor among two or more of: (a) the input of the magnetic regulation stage; (b) a first voltage node in the plurality of voltage nodes of the switched-capacitor voltage balancer stage; and (c) a second voltage node in the plurality of voltage nodes of the switched-capacitor voltage balancer stage.