理想的ではないパラメータにおける1入力E_M級増幅器の動的挙動

摘要

E_M級増幅器は高効率を維持し，かつ高周波帯に対応する電力増幅器として注目を集めつつある．先に関屋らは1入力E_M級増幅器を提案し，理想的に動作するパラメータの設計法について議論した．-方，回路パラメータによっては増幅器が理想的に動作しない可能性があるが，詳細な検討は未だ不十分である．本稿では，理想的ではない1入力E_M級増幅器の動的挙動を考える．まず，回路モデルおよび回路方程式を示し，スイッチングルールについて説明する．次に，分岐図より本系に見られる解の振る舞いについて検討する．最後に，分岐現象が本系に与える影響について議論する．%The class-EM amplifier took notice; because of keeps high efficiency and high frequency. The cIess-Em amplifier that drive with one input signal is supposed, and discussed about design parameter what drive nominal conditions. On the other hand, that amplifier have possibilities that it is not operating nominal conditions. However, there are no study about it. This paper examines the dynamic behavior of the class-EM amplifier with one input signal. First, the circuit dynamics is shown such as the switching rules and nominal conditions or outside of nominal conditions circuit parameters. Then, the dynamic behavior of the circuit is discussed based on the waveform, phase plane and bifurcation diagrams. In particular, we find that the bifurcation phenomenon occurs when the circuit parameter is changed from the nominal conditions.