در این پایان نامه، یک مبدل زمان به دیجیتال با دقت 23 پیکوثانیه بر اساس ساختار مبدل های آنالوگ به دیجیتال ‏‎dual-slope‎‏ با تکنولوژی ‏‎0/5 mcmos‎‏ دیجیتال طراحی شده است. در این طرح جهت رسیدن به دقت بالا از بلوک های جمع کننده جریان با ضریب بسط زیاد استفاده شده است. این بلوک ها طوری طراحی شده اند که وضعیت آنها کاملا نسبت به یکدیگر متقارن باشند تا اثر منابع خطا کمینه گردد. همچنین در طراحی هر یک از ...

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...

the ability to speak two languages in the world is a remarkable achievement. there is a good reason to believe that bilingualism is the norm for the majority of people in the world because 70% of the earth’s population are supposed to be bilingual or multilingual. various investigations have shown that the native language impacts foreign word recognition, and this influence is adapted by the de...