What is leakage current in cmos

Question

Accepted Answer

Leakage current in CMOS refers to the small amount of current that flows through the transistors when they are in the off state.

Leakage current occurs due to the imperfect insulation between the source and drain terminals of the transistors.
It is an undesirable phenomenon as it leads to power dissipation and can affect the performance and reliability of CMOS circuits.
Leakage current can be categorized into subthreshold leakage, gate leakage, and junction leakage.
Subthreshold leakage occurs when there is a small voltage across the gate and source terminals, causing a weak inversion current.
Gate leakage happens when there is a small current flowing through the gate oxide due to the high electric field.
Junction leakage occurs due to the reverse-biased pn junctions in the transistors, leading to a small current flow.
Leakage current can be minimized through various techniques such as transistor sizing, threshold voltage adjustment, and leakage reduction circuits.

Top Qualcomm L2 Engineer interview questions & answers