For the non-stop demands for a better and smarter society, the number of electronic devices
keeps increasing exponentially; and the computation power, communication data rate, smart …

This article reviews trends, architectures, and recent developments in CMOS-based supply
modulators (SM) used for envelope-tracking power amplifiers (ET-PAs). This review details …

This article proposes a supply modulator (SM) that uses high switching frequency gallium-
nitride (GaN) devices to achieve a four-phase fast step-down converter for the fast-tracking …

This work presents a 25 MHz adaptive on/off-time-controlled three-level buck converter with
a fast reference tracking speed and high light load efficiency. The self-balancing scheme of …

This brief provides a brief tutorial on designing a high efficiency envelope-tracking supply
modulator with recent techniques. Design challenges for 5G communication applications are …

Envelope tracking is a well-known RF technique that alleviates the efficiency problem of
linear power amplifiers used in wireless communication transmitters. It consists in varying …

Envelope tracking is an effective way to improve the efficiency of radio frequency power
amplifiers (PAs). This article presents a wideband hybrid envelope tracking supply …

A high efficiency multilevel multimode (MLMM) dynamic supply switching (DSS) modulator
using a single-inductor multiple-output (SIMO) dc-dc converter is presented to improve the …

The parallel-form switch-linear hybrid envelope tracking (ET) power supply is composed of a
linear amplifier and a switched-mode converter connected in parallel. When the output …

Envelope tracking (ET) is an effective way to improve the efficiency of power amplifier (PA)
for 5G communication systems. To understand the restriction of the hybrid supply modulator …