نتایج جستجو برای: ZVS and ZVDS Conditions
تعداد نتایج: 16895084 فیلتر نتایج به سال:
a new output structure for class e power amplifier (pa) is proposed in this paper. a series lc resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. this resonator causes low impedance at the second harmonic. the output circuit is designed to shape the switch voltage of the class e amplifier and lower the voltage stress of the transistor. t...
The theoretical efficiency of the class E frequency multiplier with arbitrary output can reach 100% by controlling phase current to satisfy ZVS/ZVDS condition. It is necessary select appropriate value shunt capacitance for satisfying these two conditions. In general, transistor consists linear external and nonlinear parasitic capacitance. Therefore, conventional design method treating as purely...
This paper presents an analysis and modeling of the class-E inverter for ZVS/ZVDS execution at any duty ratio. The methodology is to determine input current analytically under assumption that it always remains positive. latter ensured by proper selection inductance such operates either in (1) border condition mode or (2) continuous conduction regardless ripple. Using this applying boundary cond...
A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...
A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...
In this paper, the analysis and design method for suboptimum Class- $\text{E}_{\mathrm {M}}/\text{F}_{3}$ inverter (i.e., only zero-voltage switching (ZVS), zero-voltage-derivative (ZVDS), zero-current (ZCS) conditions are satisfied) ...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
tennessee williams (1911-1983), the modern american dramatist, had his own unique school of dramaturgy. the dramas which he depicted are populated by characters who are lonely, desperate, in anxiety, alienated and in one word lost. they face challenges which they may overcome or not, through the choices they make. all these moods and conditions are clearly seen and explained in the theory of ex...
This article presents the analysis and design of a Class- $\text{E}_{\mathrm {M}}/\text{F}_{\mathrm {n}}$ power amplifier (PA). The high peak switch voltage factor classical {M}}$ PA is reduced by 27.3% through adoption notation="LaTe...
as polysemy is encountered frequently in english as foreign language. fl learners’ ability to disambiguate polysemous verbs becomes critical to their comprehension in the target language. this thesis, accordingly, investigated how iranian efl learners achieved comprehension of english polysemous verbs by using three different types of cues: (1) elaborated context, (2) semantic frames, and (...
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