AVERAGE POWER TRACKING POWER MANAGEMENT INTEGRATED CIRCUIT

摘要

An average power tracking (APT) power management integrated circuit (PMIC) is provided. The APT PMIC is configured to generate an APT voltage to a power amplifier for amplifying a high modulation bandwidth (e.g., ≥200 MHz) radio frequency (RF) signal. The APT PMIC includes a voltage amplifier configured to generate an initial APT voltage and an offset capacitor configured to raise the initial APT voltage by a modulated offset voltage. The APT PMIC can be configured to modulate the initial APT voltage and the modulated offset voltage concurrently based on a time-variant APT target voltage. As a result, the APT PMIC can adapt the APT voltage very quickly between different voltage levels, thus making it possible to amplify a high modulation bandwidth radio frequency (RF) signal for transmission in a fifth-generation (5G) communication system.