Results 171 to 180 of about 9,812 (215)
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Floating Bulk Cascode Class-E Power Amplifier
IEEE Transactions on Circuits and Systems II: Express Briefs, 2019In this brief, the switching behavior of the cascode topology is improved through the floating bulk (FB) technique. Although the cascode structure has the advantage of reducing voltage stress on transistors, its parasitic elements increase power loss.
Ali Reza Dehqan +2 more
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Design and optimization of CMOS class-E power amplifier
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003A new class-E power amplifier design approach, in which the design problem is posed as combinatory optimization, is described. To incorporate the frequency dependent components in the optimization procedure, a simplified frequency domain simulation method was proposed to speed up the simulation.
Zhan Xu, Ezz I. El-Masry
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A Current-Injection Class-E Power Amplifier
IEEE Microwave and Wireless Components Letters, 2020A novel class-E power amplifier (PA) using a current-injection (CI) technique is presented in this letter. An auxiliary current source, which injects the current into the load during each turn-off period of switching transistors, is introduced into the conventional class-E PA.
Jian-Chang Du +3 more
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Class-E and inverse class-E switch-mode power amplifiers
Journal of Communications Technology and Electronics, 2012Circuits of class-E and inverse class-E (Einv) switch-mode power amplifiers (PAs) are systemized on the basis of the principle of duality. New PA circuits (four class-Einv PA circuits and one class-E PA circuit) are proposed. The design relationships for values of reactive LC components of PA shaping circuits are given.
A. V. Vasil’ev, V. B. Kozyrev
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On the feasibility of application of class E RF power amplifiers in UMTS
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003This paper investigates the feasibility of the application of class E RF power amplifiers in UMTS. A typical class E circuit has been designed and simulated, in conjunction with a linearization scheme based on the EER principle. The EER testbench uses ideal building blocks, since the emphasis is on the operation of the amplifier itself. Three different
Milosevic, D. +2 more
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A cascode modulated class-E power amplifier for wireless communications
Microelectronics Journal, 2011A cascode modulated CMOS class-E power amplifier (PA) is presented in this paper. It is shown that by applying a modulated signal to the gate of the cascode transistor the output power is modulated. The main advantage of the proposed technique is a high 35dB output power dynamic range. The peak power added efficiency (PAE) is 35%.
Daniel Sira, Pia Thomsen, Torben Larsen
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An improved method of power control with CMOS class-E power amplifiers
2008 IEEE International Symposium on Circuits and Systems (ISCAS), 2008In this paper, an improved method of power control is introduced to widen the range of output power with high efficiency. Two CMOS class-E power amplifiers (PA) with different output power are adopted in the design. In order to eliminate the phase mismatch of two paths, a continuously adjustable CMOS phase shifter with a predictable phase transfer ...
Tongqiang Gao +3 more
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A 60GHz Class-E Power Amplifier in SiGe
2006 IEEE Asian Solid-State Circuits Conference, 2006A millimeter-wave Class-E tuned power amplifier is realized in 0.13 mum SiGe BiCMOS technology. To accomplish switching-mode operation at 60GHz, the transmission line input impedance transformation network provides a low real source impedance rather than optimum power match.
Alberto Valdes-Garcia +2 more
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2001
It is desirable to obtain high RF power amplifier efficiency in many practical applications. At least one, if not all, of the following requirements is important: low power consumption (especially for battery-operated equipment), low temperature rise of the components, high reliability, small size, and light weight. Although the parasitic energy losses
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It is desirable to obtain high RF power amplifier efficiency in many practical applications. At least one, if not all, of the following requirements is important: low power consumption (especially for battery-operated equipment), low temperature rise of the components, high reliability, small size, and light weight. Although the parasitic energy losses
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Class-E high efficiency power amplifiers
[1992] Proceedings of the 35th Midwest Symposium on Circuits and Systems, 2003Three switching mode power amplifiers are realized with collector (drain) efficiencies of 87%, 86% and 92% at 430 MHz/5 W, 100 MHz/12 W, and 5 MHz/62 W, respectively. These high efficiencies are achieved by the class-E technique and low insertion-loss load networks. Detailed design rules and major parameters are presented.
Q.-S. Tan, C. Ciotti, H.J. Schmitt
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