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Operational Amplifiers - Technical MCQs

Q1:

A PLL can be used as a(n) ___________.

A series voltage regulator

B frequency multiplier

C relaxation oscillator

D Schmitt trigger

ANS:B - frequency multiplier

PLL is a electronic component. Its output voltage is proportional phase difference f (input) and f (output), its used @fsk fm modulate frequency key shift.