Results 271 to 280 of about 557,404 (343)

A method for predicting the ZVS condition for the class E amplifier

2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353), 2003
A method for predicting the ZVS condition before turning the switch on is presented for the class E amplifier operating with D=0.5. The prediction is obtained in realtime by observing the switch current waveform and the shunt capacitor current waveform with a simple analog-digital circuit. Using this method, a control circuit that ensures ZVS condition
Tadashi Suetsugu, Marian K. Kazimierczuk
openaire   +1 more source

An RF Choke-Less Class E Power Amplifier

IEEE Transactions on Circuits and Systems II: Express Briefs, 2020
An RF-choke (RFC) is a crucial but difficult-to-realize component of all Class-E power amplifiers (PAs). A Class-DE PA does not require an RFC but requires two non-overlapping clocks for its operation. This brief presents an RFC-less Class-E PA which operates with a single 50% duty-cycled clock.
Gagan Deep Singh, Nagarjuna Nallam
openaire   +1 more source

Floating Bulk Cascode Class-E Power Amplifier

IEEE Transactions on Circuits and Systems II: Express Briefs, 2019
In 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, Siroos Toofan, Hadi Lotfi   +2 more
openaire   +1 more source

Design and optimization of CMOS class-E power amplifier

Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003
A 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
openaire   +1 more source

Class-E amplifier with an inductive impedance inverter

IEEE Transactions on Industrial Electronics, 1990
A design procedure and experimental results are presented for a class-E amplifier with an inductive impedance inverter. Experimental waveforms and characteristics measured at 1 MHz with an IRF620 MOSFET are given for the amplifier, which can operate under zero-voltage switching conditions for load resistances ranging from a short circuit to an open ...
M. Kazimierczuk, X. T. Bui
semanticscholar   +2 more sources

Analysis of dynamic frequency response of class E amplifier

2009 IEEE International Symposium on Circuits and Systems, 2009
A dynamic response of the output voltage to the input supply voltage V DD of a class E amplifier is derived with modeling the circuit by a low-frequency model and a high-frequency model. If the perturbation frequency is much lower than the switching frequency, the state-space averaging model of the class E amplifier can be approximated as a single ...
Tadashi Suetsugu, Marian K. Kazimierczuk
openaire   +1 more source

Load–Pull Wideband Class-E Amplifier

IEEE Microwave and Wireless Components Letters, 2007
A new technique to design wideband Class-E power amplifiers (PAs) based on the synthesis of specific load admittances at fundamental and harmonics is shown. This technique symplifies the design of wideband Class-E amplifiers by making it independent on any specific load network, implementation, and intrinsic transistor output capacitance COUT ...
F. Ortega-González
semanticscholar   +2 more sources

A CMOS class-E Power Amplifiers with Power Control

2007 IEEE International Symposium on Circuits and Systems, 2007
In this paper, a CMOS class-E power amplifier with power control is presented. Its output power could be varied over a broad range with high efficiency by utilizing the combination of the parallel amplification technique and the drain modulation technique.
Tongqiang Gao, Dongmei Li, Baoyong Chi, Zhihua Wang 0001   +3 more
openaire   +1 more source

Comparison of two Class-E Amplifiers for EER Transmitter

2005 IEEE International Symposium on Circuits and Systems, 2005
This paper compares two types of class E power amplifier and studies their applicability in an EER (envelope elimination and restoration) transmitter. In EER applications one of the main concerns is the modulation bandwidth of the supply voltage and DC bias current. It is shown here that a recently proposed parallel tuned class E dimensioning principle
Antti Heiskanen, Timo Rahkonen
openaire   +1 more source

A Current-Injection Class-E Power Amplifier

IEEE Microwave and Wireless Components Letters, 2020
A 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, Zhi-Gong Wang, Jian Xu, Yi-Fan Yang   +3 more
openaire   +1 more source