Theory and design of an ultra-linear square-law approximated LDMOS power amplifier in class-AB operation

Theory and Design of an Ultra-Linear Square-Law Approximated LDMOS Power Amplifier in Class-AB Operation

This paper describes a power amplifier, employing parallel-connected laterally diffused metal–oxide semiconductor (LDMOS) devices with optimized channel widths and bias offsets to approximate ideal square-law behavior of the overall transconductance in class-AB operation. The proposed method results in a significant linearity improvement over a large dynamic range in comparison to a conventiona...

Design of High Efficiency Broadband Adjusted Class AB Power Amplifier

WiMAX Power Amplifier Design Based On Si-LDMOS

Until recently, WiMAX systems have used technology processes such as Gallium-Arsenide (GaAs) to obtain the performance needed from the RF circuits. Although these technologies provide the functional performance required by radios today, they do not support the cost/scalability business model. This paper outline the design of a power amplifier (PA) for WiMAX base station applications at 3.5GHz b...

A Si LDMOS-Based UHF Power Amplifier

1 This work was undertaken as the Electronics and Telecommunications Engineering degree Final Project of its two first authors. Abstract The design, implementation and performance tests of an Si LDMOS-Based power amplifier for UHF is presented. The amplifier, conceived for medium power GSM-900 base-station applications, consists of a Class-AB single stage circuit designed for maximum output pow...

An LDMOS VHF Class-E Power Amplifier Using a High- Novel Variable Inductor

In this paper, an lateral diffused metal–oxide– semiconductor-based very high-frequency class-E power amplifier has been investigated theoretically and experimentally. Simulations were verified by amplifier measurements and a record-high class-E output power was obtained at 144 MHz, whic is in excellent agreement with simulations. The key of the results is the use of efficient device models, si...