Hybrid switched mode/linear power amplifier power supply for use in polar transmitter

In one aspect this invention provides a DC-DC converter that has a switch mode part for coupling between a DC source and a load, the switch mode part providing x amount of output power; and that further has a linear mode part coupled in parallel with the switch mode part between the DC source and th...

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Bibliographic Details
Main Author GRIGORE VLAD GABRIEL
Format Patent
LanguageEnglish
Published 26.01.2010
Subjects
AMPLIFIERS
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
CONTROLLING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
TRANSMISSION
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Summary:In one aspect this invention provides a DC-DC converter that has a switch mode part for coupling between a DC source and a load, the switch mode part providing x amount of output power; and that further has a linear mode part coupled in parallel with the switch mode part between the DC source and the load, the linear mode part providing y amount of output power, where x is preferably greater than y, and the ratio of x to y may be optimized for particular application constraints. In a further aspect there is a radio frequency (RF) transmitter (TX) for coupling to an antenna, where the TX has a polar architecture having an amplitude modulation (AM) path coupled to a power supply of a power amplifier (PA) and a phase modulation (PM) path coupled to an input of the PA, where the power supply includes the switch mode part for coupling between a battery and the PA and the linear mode part coupled in parallel with the switch mode part between the battery and the PA.
Bibliography:Application Number: US20060399118