Explanation: At corner frequency, the phase angle is -45o (lagging) and at infinite frequency the phase angle is -90o. Therefore, a maximum of 90 o phase change can occur in an op-amp with a single capacitor. 3. How can the gain roll off represented in dB/octave?
A. 12 dB/octave
B. 6 dB/octave
C. 10 dB/octave
D. 8 dB/octave
Answer:A
Explanation: At corner frequency, the phase angle is -45o (lagging) and at infinite frequency the phase angle is -90o. Therefore, a maximum of 90 o phase change can occur in an op-amp with a single capacitor. 3. How can the gain roll off represented in dB/octave?
A. 12 dB/octave B. 6 dB/octave C. 10 dB/octave D. 8 dB/octave
Explanation: Octave represents a two fold increase in frequency. Therefore, 20 gain roll off at the rate 20 dB/decade is equivalent to 6 dB/octave. 4. Select the correct magnitude and phase for the frequency range.