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 …

In modern mobile communication systems, spectral efficient modulation formats have been
widely used, which results in the envelope of the radio frequency (RF) signal is variable and …

As mobile communication systems evolve to handle higher data rates, their modulation
schemes only become more complicated, generating signals with large bandwidth and high …

This paper describes the analysis of an optimized envelope shaping function for the
envelope tracking power amplifier (ET PA) and its implementation. The proposed shaping …

A quarter-wavelength impedance transformer as well as a number of other factors limit the
bandwidth (BW) of Doherty power amplifiers (PAs). We utilize the lower Q of a quarter-wave …

A new supply modulator architecture for robust performance against the battery voltage
variation is presented. The resulting modulator is an optimized power management …

Modern wireless communication systems have evolved to support increasing numbers of
subscribers and provide higher data rate services within the limited frequency resources. As …

A multimode/multiband power amplifier (PA) with a boosted supply modulator is developed
for handset applications. A linear broadband class-F amplifier is designed to have a …

This paper presents a SiGe envelope-tracking (ET) cascode power amplifier (PA) with an
integrated CMOS envelope modulator for mobile WiMAX and 3GPP long-term evolution …

This paper presents a highly efficient silicon-based envelope-tracking power amplifier (ET-
PA) for broadband wireless applications. A pseudo-differential power amplifier (PA) is …