APPARATUS AND METHODS FOR A CAPACITIVE DIGITAL-TO- ANALOG CONVERTER BASED POWER AMPLIFIER

摘要

This application provides apparatus and methods for a capacitive digital-to-analog converter (CDAC) based power amplifier. In an example, a transmitter amplifier can include an input inductor, a switch having a first node coupled to the input inductor, and a control node, the amplifier configured to receive a first analog representation of an envelope signal at the first node, to receive a second analog representation of the amplitude signal from the inductor, to receive a phase signal at the control node, and to provide a first modulated signal using the phase signal, the first analog representation of the amplitude signal and the second analog representation of the amplitude signal, and a capacitive digital-to-analog converter (CDAC) configured to receive a digital representation of the amplitude signal and to provide the first analog representation of the amplitude signal.

主权项

1. A transmitter amplifier comprising:
a switch having a control node and a switched node, the switched node coupled to an input inductor; and a capacitive digital-to-analog converter (CDAC) configured to receive a digital representation of an amplitude signal and to provide a first analog representation of the amplitude signal; and wherein the transmitter amplifier is configured to receive the first analog representation of the amplitude signal at the switched node, to receive a second analog representation of the amplitude signal from the input inductor, to receive a phase signal at the control node, and to provide a modulated signal using the phase signal, the first analog representation of the amplitude signal and the second analog representation of the amplitude signal.