A METHOD OF OPERATING A RADIO FREQUENCY TRANSMITTER WITH HYBRID SWITCHED MODE/LINEAR POWER AMPLIFIER POWER SUPPLY FOR USE IN POLAR TRANSMITTER

摘要

In one aspect this inv coupling between a output power; and tha mode part between th of output power, wh optimized for particu frequency (RF) trans architecture having a a power amplifier (PA where the power supp and the PA and the 1 between the battery a ntionn provides a DC-DC converter that has a switch mode part for C source and a load, the switch mode pare. providing x amount of further has a linear mode part coupled in parallel with the switch DC source and the load, the linear mode part providing y amount re x is preferably greater than y, and the ratio of x to y may be ar application constraints. In a further aspect there is a radio fitter (TX) for coupling to an antenna, where the TX has a polar amplitude modulation (AM) path coupled to a power supply of and a phase modulation (PM) path coupled to an input of the PA, y includes the switch mode part for coupling between a battery near mode part coupled in parallel with the switch mode part d the PA.