LOW POWER STEP EFFICIENCY IMPROVEMENT CIRCUITS
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2002-Feb-25
Power amplifiers that are capable ofdelivering a range of power outputs are normally designed to operate most efficiently at the highest power level. This is because the current drain penalty for lower efficiency is worse at higher power output. When the same amplifier is used at a much reduced power level, it's efficiency is drastically reduced. If opera- tion at lower power output is a significant percent of total use, better efficiency at lower power levels will greatly improve performance. This paper describes two techniques to improve efhciency at low power levels while maintaining performance at the higher power levels.