Discussion
Which factor does not affect CMOS loading ?
Answer: C
The factor that does not affect CMOS loading is the output capacitance of the load gate.
When a CMOS gate drives other gates, the load it sees is the input capacitance of the gates it drives, plus wiring. The driving gate charges this capacitance through its pull-up transistor and discharges it through its pull-down transistor, so the charging and discharging times set by its output resistance decide how fast it can switch.
The output capacitance of the load gate sits on that gate's own output node, which the driving gate never charges, so it plays no part in loading the driver.
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