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 …

The demand on telecom operators for new services and increased data rates has created
difficult requirements for the signal-to-noise-and-distortion ratio of wireless systems …

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 …

This paper presents the realization of a linear polar transmitter supporting multistandard
applications. The harmonic-tuned class-AB biased (class-AB/F) power amplifier (PA) with …

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

This paper presents an optimized envelope tracking (ET) operation of a Doherty amplifier.
Compared to the general ET/envelope elimination and restoration transmitter, it has an …

A combined linear and delta-modulated (DeltaM) switch-mode PA supply modulator for
polar transmitters in wireless handsets is designed in a 0.25 mum CMOS process. The …

This paper presents an envelope tracking power amplifier (ET PA) using a dual-mode
supply modulator for handset application. The supply modulator has a combined structure …

(57) ABSTRACT A transmitter (70) generates a time-varying, detroughed, biasing signal
(154) foran RF power amplifier (10) so that the RF power amplifier (10) is biased in …