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Date: 22-10-2020
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Date: 18-5-2017
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Date: 18-10-2020
933
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JUNCTION CAPACITANCE
Under conditions of reverse bias, a p-n junction can act as a capacitor. A special type of diode called a varactor (a contraction of the words variable reactor) is manufactured with this property specifically in mind. The junction capacitance of a varactor can be varied by changing the reverse-bias voltage because this voltage affects the width of the depletion region. The greater the reverse voltage, the wider the depletion region gets, and the smaller the capacitance becomes. A good varactor can exhibit a capacitance that fluctuates rapidly, following voltage variations up to high frequencies.
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أمراض منتصف العمر.. "أعراض خطيرة" سببها نقص المغنيسيوم
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لماذا تتناقص أعداد النحل عالميا؟
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ممثل المرجعية العليا: العتبة الحسينية تخطط لإنشاء مراكز متخصصة للكشف المبكر عن (سرطان الثدي) بعموم العراق
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