Multi-amplifier envelope tracking circuit and related apparatus

Abstract

A multi-amplifier envelope tracking (ET) circuit and related apparatus are provided. The multi-amplifier ET circuit includes a number of amplifier circuits configured to amplify concurrently a radio frequency (RF) signal to generate a number of amplified RF signals for concurrent transmission, for example, in a millimeter wave (mmWave) spectrum. The amplifier circuits are configured to amplify the RF signal based on a number of ET voltages and a number of low-frequency currents, respectively. A number of driver circuits is provided in the multi-amplifier ET circuit to generate the ET voltages and the low-frequency currents for the amplifier circuits, respectively. In examples discussed herein, the driver circuits are co-located with the amplifier circuits to help improve efficiency and maintain linearity in the amplifier circuits, particularly when the RF signal is modulated at a higher modulation bandwidth (e.g., >80 MHz).

Dependencies are inferred from the claim text.