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Title: High-Frequency Power Amplitude Modulators with Class-E Tuned Amplifiers, Journal of Telecommunications and Information Technology, 2008, nr 4

Creator:

Mikołajewski, Mirosław ; Modzelewski, Juliusz

Date:

2008, nr 4

Resource Type:

artykuł

Description:

A high-frequency power amplifier used in a drain amplitude modulator must have linear dependence of output HF voltage Vo versus its supply voltage VDD. This condition essential for obtaining low-level envelope distortions is met by a theoretical class-E amplifier with a linear shunt capacitance of the switch. In this paper the influence of non-linear output capacitance of the transistor in the class-E amplifier on its Vo(VDD) characteristic is analyzed using PSPICE simulations of the amplifiers operating at frequencies 0.5 MHz, 5 MHz and 7 MHz. These simulations have proven that distortions of theVo(VDD) characteristic caused by non-linear output capacitance of the transistor are only slight for all analyzed amplifiers, even for the 7 MHz amplifier without the external (linear) shunt capacitance. In contrast, the decrease of power efficiency of the class-E amplifier resulting from this effect can be significant even by 40%.

Publisher:

Instytut Łączności - Państwowy Instytut Badawczy, Warszawa

Format:

application/pdf

Resource Identifier:

oai:bc.itl.waw.pl:226

DOI:

10.26636/jtit.2008.4.903

ISSN:

1509-4553

eISSN:

1899-8852

Source:

Journal of Telecommunications and Information Technology

Language:

ang

Rights Management:

Biblioteka Naukowa Instytutu Łączności

Subject and keywords:

high-efficiency amplitude modulators non-ZVS operation sub-optimum operation PSPICE simulations optimum operation

Object collections:

Last modified:

Feb 25, 2026

In our library since:

Jan 6, 2010

Number of object content hits:

435

All available object's versions:

https://bc.itl.waw.pl/publication/259

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Modzelewski, Juliusz; Mikołajewski, Mirosław, High-Frequency Power Amplitude Modulators with Class-E Tuned Amplifiers, Journal of Telecommunications and Information Technology, 2008, nr 4 Feb 25, 2026
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E-Mail

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