Phase shift & magnitude (gain)
Q. An increase in operating frequency also increases ______ between input and output and decreases ______ for a compensating network of an amplifier.- Published on 26 Oct 15a. Phase shift & magnitude (gain)
b. Phase shift & break frequency
c. Magnitude (gain) & Phase shift
d. Break frequency & Phase shift
ANSWER: Phase shift & magnitude (gain)
It is the fundamental property of an amplifier that the value of gain (magnitude) goes on decreasing while phase-shift between input and output goes on increasing whenever there is rise in an operating frequency.
Change in the gain of an Op-amp due to variation in frequency is graphically estimated by 'Magnitude Plot', whereas change in phase with respect to variation in phase-shift is evaluated in terms of 'Phase Angle Plot'.
However, modification in an op-amp performance can be handled as per the requisite level by controlling the level of gain and phase-shift of the compensating networks.
