A Radio frequency transmitter with hybrid switched mode/linear power amplifier power supply for use in polar transmitter

摘要

According to an aspect of the invention, a DC-DC converter, DC between the source and the switch mode part for connecting the load (switch mode part) as the switch mode part providing an output power amount x and the DC source and the load, the switch a linear mode part coupled in parallel with the sub-mode, the DC-DC converter is provided which includes a linear mode to provide an output power amount y. X is greater than y preferred in the present invention, the ratio of x to y may be optimized for a particular application limit value (constraints). According to another aspect, phase modulation (PM) connected to the input of a transmitter (TX) for connection to an antenna, power amplifier polar amplitude modulation (AM) path and the power amplifier (PA) connected to a power supply of the (PA) and a path. Power source, a switch mode part for connection between the battery and the power amplifier (PA), between the amount of output power x switch mode part and the battery and the power amplifier (PA) for providing, the switch mode part and the linear connected in parallel It includes a mode.