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Class-N high-frequency power amplifier

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4 Author(s)
A. N. Rudiakova ; Radio Phys. Dept., Donetsk State Univ., Ukraine ; M. K. Kazimierczuk ; J. V. Rassokhin ; V. G. Krizhanovski

A new class of high-efficiency amplification is introduced. It based on the reduction of time-average dissipation in transistor power instead of state-of-the-art reduction of instantaneous dissipated power. This becomes possible due the influence of capacitance currents that produce a negative collector current swing during a part of AC-period. In this case, along with an always-positive collector-emitter voltage, the instant dissipated power also is negative. A high-efficiency BJT power amplifier was simulated in order to demonstrate the new class features.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:5 )

Date of Conference: