A new monolithic-microwave integrated-circuit power amplifier for cellular handsets has
been implemented using the load-modulation concept of the Doherty amplifier, which has a …

The low oxide breakdown voltage of CMOS power transistor and low power-added
efficiency (PAE) at low power levels have been major challenging issues in the …

The first official shift in communication systems from fixed-location devices to
portable/mobile devices happened in 1973 when Martin Cooper, general manager of …

A novel SiGe heterojunction bipolar transistor power cell for wireless LAN IEEE 802.11 a
power amplifier (PA) applications is proposed. The subcells with different emitter stripe …

A multimode RF amplitude modulator and a digitally controlled variable attenuator (VATT)
are presented. A comprehensive analysis of nonlinear distortion in a current source …

For the fast prototyping, production, and delivery of commercial radio frequency
products/systems, accurate and reliable test systems are necessary. These systems are …

The objective of this research is to analyze and improve linearity of envelope elimination
and restoration (EER) radio frequency (RF) power amplifiers. Envelope elimination and …

The essential purpose of this chapter is to introduce theoretical and numerical approaches
that can be used for modeling nonlinear effects that appear intrinsically in the design of …

In recent years, silicon germanium (SiGe) has become a competitive candidate for the
development of cellular handset power amplifiers (PAs) of third-generation (3G) wireless …

When designing circuits, it is often unavoidable to mix digital and analog signals.
Considering electromagnetic compatibility, then the digital signal must be separated from …