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AssigneeThe Regents of the University of Colorado, a body corporate
InventorsTommaso Cappello, Corrado Florian, Zorana Popovic
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A multi-level supply modulator for RF power amplifiers requires only a single independent voltage supply along with one or more flying capacitors to achieve multiple output levels. The flying capacitor is used to store the intermediate voltage level between the DC supply level and ground. A switch network is connected between the DC voltage supply and the power amplifier and is configured to provide power at variable, discrete DC voltages, for example the DC voltage supply level, ground, and a level halfway between the DC voltage supply level and ground. The flying capacitor is connected to switches in the switch network, and a sensing circuit detects the voltage across the flying capacitor and generates a feedback signal. Control circuitry controls the switch network (and thus the power supplied to the amplifier) based on the feedback signal.
A multi-cell supply modulator for providing variable-voltage DC power to an RF power amplifier comprising:
Dependencies are inferred from the claim text.