CMOS Linear Power Amplifier with Envelope Tracking Operation (Invited Paper)

Fully Integrated CMOS Power Amplifier

Highly Efficient Envelope-Tracking Modulator Over Wide Output Power Range for Dual-Mode Power Amplifier

This paper presents a highly efficient envelope-tracking (ET) modulator over wide output power range. The ET modulator is designed to operate with a dual-mode power amplifier (PA). The supply voltage of the linear regulator is adjusted according to the average power level for further enhanced efficiency at a low power region. An adaptive bias circuit is designed to avoid the crossover distortio...

A 28-36 GHz Optimized CMOS Distributed Doherty Power Amplifier with A New Wideband Power Divider Structure

Background and Objectives: In this paper, a new design strategy was proposed in order to enhance bandwidth and efficiency of power amplifier. Methods: To realize the introduced design strategy, a power amplifier was designed using TSMC CMOS 0.18um technology for operating in the Ka band, i.e. the frequency range of 26.5-40GHz. To design the power amplifier, first a power divider (PD) with a ver...

A Highly Linear Cmos Amplifier for Variable Gain Amplifier Applications

This paper reports the design of a highly-linear CMOS amplifier for Variable Gain Amplifier (VGA) applications. A better than –60dB 3rd harmonic distortion at differential output level of 1V peak-to-peak is obtained by utilizing a linearization scheme that does not rely on the active devices. The amplifier maintains 3dB bandwidth over 300MHz. A noise figure at 8.6dB is obtained with source impe...

Power Amplifier Circuits in CMOS Technologies

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