Patent attributes
A multi-mode envelope tracking (ET) amplifier circuit is provided. The multi-mode ET amplifier circuit can operate in low-resource block (RB) mode and high-RB mode. The multi-mode ET amplifier circuit includes an ET amplifier(s) to amplify a radio frequency (RF) signal(s) to an amplified voltage, low-RB switcher circuitry to generate a direct current (DC) current, and high-RB switcher circuitry to generate an alternating current (AC) current. The amplified voltage, the DC current, and the AC current collectively cause the RF signal to be transmitted at a determined power. A control circuit(s) activates the high-RB switcher circuitry in the high-RB mode to provide the AC current, thus minimizing AC current sourced from the ET amplifier(s). As a result, it is possible to improve efficiency of the ET amplifier(s) and the multi-mode ET amplifier circuit in the high-RB mode and the low-RB mode.
