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Foad Arfaei Malekzadeh
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Book
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Chapter
Dithering
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Chapter
Spurious Analysis
Amplification of a modulated signal in the presence of a large dither in a nonlinear medium such as switch mode power amplifiers facilitates linear performance of the transmitter since most of the nonlinearity...
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Chapter
Low Frequency Dithering
The open loop and closed loop class-D amplifiers both opt for low frequency dithering for linearization, due to their high slope gain. They may opt for drain efficiency improvement, depending on their process ...
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Chapter
Introduction
Power amplifiers are the most power hungry and perhaps the most expensive part of the wireless transmitters in the RF chain. The key differentiators among different PAs are cost, yield, weight, efficiency, eas...
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Chapter
Describing Functions
The main motivation for describing function (DF) techniques is the need to understand the behavior of nonlinear system. The DF definition is based on the simple fact that many systems are nonlinear except in l...
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Chapter
High Frequency Dithering
Based on the analysis introduced in Chap. 4 about important dithering parameters, the most important ones are the slope gain and the parasitic capacitances of the device. The former maintains the dithered gain...
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Chapter
Novel Interpretations of Dithering
The preceding chapters were devoted to analysis and simulation of the dithering process, its linearization effect, and formulation of the in and out of band nonlinearities. According to the theoretical finding...
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Chapter
Architectures and Topologies
Dithering is applicable to any nonlinear system, to enhance linearity. We normally use the dithering to linearize the switched mode power amplifiers, while benefiting from good efficiency. The system architect...
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Chapter
Linearity Analysis
Modern wireless communication systems utilize sophisticated modulation techniques to achieve higher data rates or improvements in overall system capacity. Amplitude variations in the modulated waveforms give r...
