Semiconductor Diodes

AC Equivalent Circuit of Semiconductor Diode

AC Equivalent Circuit of Semiconductor Diode: Junction Capacitances – The depletion region of a pn-junction is a layer depleted of charge carriers situated between two blocks of low resistance material. Because this is the description of a capacitor, the depletion region clearly has a capacitance. The depletion layer capacitance (Cpn) may be calculated from the equation …

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Diode Approximations

Diode Approximations: Diode Approximations – As we know already that, a diode is essentially a one-way device, offering a low resistance when forward biased, and a high resistance when biased in reverse. An ideal diode (or perfect diode) would have zero forward resistance and zero forward voltage drop. It would also have an infinitely high …

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Forward and Reverse Bias Characteristics of Diode

Forward and Reverse Bias Characteristics of Diode: Figures 2-4 and 2-5 show typical Forward and Reverse Bias Characteristics of Diode for low-current silicon and germanium diodes. From the silicon diode characteristics in Fig. 2-4, it is seen that the forward current (IF) remains very low (less than microamps) until the diode forward-bias voltage (VF) exceeds …

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