AC or Dynamic Resistance

Posted by AJ × 23:36

Forward Bias region:

• The resistance depends on the amount of current (ID) in the diode.

Rd=Δvd/ ΔId

• The resistance depends on the amount of current (ID) in the diode.

• The voltage across the diode is fairly constant (VT = 26mV for 25°C).

• Reverse Bias region:

Rd=∞

The resistance is essentially infinite. The diode acts like an open.

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