Analysis of class AB amplifier in supply modulation of EER transmission systems

The analysis and design of class AB amplifier applied to supply modulation of EER transmission systems are presented. It is shown that the gain-bandwidth product and the output resistance of the class AB amplifier must be optimized at a given power consumption to meet the output spectrum requirements. The results show that a unity gain class AB amplifier with close loop bandwidth above 3.5MHz at 5Ω load resistance is required to meet the EDGE output spectrum mask requirements.