Results 251 to 260 of about 23,589 (286)

Class E frequency multiplier driving Class E amplifier

Proceedings of Power and Energy Systems in Converging Markets, 2002
In this paper, we propose the Class E frequency multiplier driving Class E amplifier. This circuit is composed of two series connected Class E amplifiers. One of these Class E amplifiers works like a driver circuit. The proposed circuit can reduce the total power dissipation of the driving stage and can work with higher efficiency.
T. Kawahara, T. Suetsugu
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Continuous Class-E Power Amplifier Modes

IEEE Transactions on Circuits and Systems II: Express Briefs, 2012
In this brief, a continuum of novel closed-form solutions is derived for class-E power amplifiers (PAs). It is analytically proven that the class-E zero voltage/zero voltage derivative switching conditions can be satisfied for an arbitrarily selected reactive second harmonic switch impedance (Z2S).
Mustafa Ozen, Rik Jos, Christian Fager
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Class D and class E selectable power amplifier

INTELEC 2009 - 31st International Telecommunications Energy Conference, 2009
A switching power amplifier which can be operated as a class D amplifier and a class E amplifier is proposed. The proposed circuit can be operated as a high efficiency soft switching power amplifier at a high operating frequency and it also can be operated as a class D amplifier at a low operating frequency.
Akito Kiri, Kouta Ohara, Yoshihiro Tomita, Seiji Shukuri, Takeshi Yasukouchi, Tadashi Suetsugu   +5 more
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AC-driven class E amplifiers

Proceedings of 40th Midwest Symposium on Circuits and Systems. Dedicated to the Memory of Professor Mac Van Valkenburg, 2002
Because of its high efficiency (about 96 percent) the class E tuned power amplifier has found applications in DC-to-AC inverters and DC-to-DC converters, and also frequency multipliers. The most basic configuration of a class E amplifier consists of a transistor operating as a switch connected to a load network which, in turn, contains a capacitor ...
B. Ong, R.E. Zulinski, J.C. Mandojana
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Stability of generalized class E amplifiers

Proceedings of the 33rd Midwest Symposium on Circuits and Systems, 2002
The circle theorem is used to prove that a generalized class E amplifier is exponentially stable. This suggests driving class E amplifiers with periodic forcing functions that have a period not necessarily equal to the switching period. Some interesting applications of these circuits include high-efficiency AC-AC power conversion. >
J.C. Mandojana, K.J. Herman, R.E. Zulinski   +2 more
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Computer control of a Class-E amplifier

International Journal of Electronics, 1988
High frequency electrical power supplies used in many industrial applications have to be able to withstand appreciable variations in load impedance. This paper describes the use of a computer to control a Class-E amplifier power supply which is being developed for high frequency induction and dielectric heating applications.
D. COLLINS, S. HINCHLIFFE, L. HOBSON
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New topology for Class E amplifiers

International Journal of Electronics, 2007
A Class E RF amplifier, which can operate into any load conditions without need for other additional circuitry to protect transistors, is introduced. This is provided by the new topology, which is called an inductive clamp. Our topology incorporates inductive clamp circuitry to the basic Class E amplifier circuit and it has all the benefits of Class E ...
A. Eroglu, D. Lincoln, A. Radomski, Y. Chawla   +3 more
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Class-E and inverse class-E switch-mode power amplifiers

Journal of Communications Technology and Electronics, 2012
Circuits 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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A class‐E CMOS RF power amplifier with cascaded class‐D driver amplifier

Microwave and Optical Technology Letters, 2007
AbstractA 800‐MHz power amplifier is designed using a 0.18‐μm RF CMOS process. The voltage‐combining method is used for power combining. A transmission line transformer on a printed circuit board (PCB) is designed as a power combiner. For the switching mode power amplifier, a cascaded class‐D driver amplifier is proposed using a feedback resistor and a
Jang, JM Jang, Jaemin, Lee, HT Lee, Hongtak, Park, CK Park, Changkun, Hong, SC Hong, Songcheol   +3 more
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Feedthrough cancellation in a class E amplified polar transmitter

2007 18th European Conference on Circuit Theory and Design, 2007
The purpose of this work is to study feedthrough cancellation methods available for a class E amplified polar transmitter. A mathematical feedthrough cancellation using measured S-parameters is presented. The results show a clear improvement to the nonlinear behaviour of a class E amplifier.
Rahkonen Timo, Rautio Timo, Hietakangas Simo Sakari   +2 more
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