Qualcomm Interview Question: why is matching required?... | Glassdoor

Interview Question

Analog Design Engineer/Power Management Interview Chandler, AZ

why is matching required?


Interview Answer

1 Answer


Matching in MOSFET transistor inverters is necessary because the electrons that move in the NMOS transistor move at a faster rate than the holes that move in the PMOS transistor. This means when a signal is received, the NMOS will react before the PMOS. To equalize this, they transistors must be matched (by adjusting their widths) so that their transition times are the same.

Sid Muthal on Oct 1, 2013

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