Explanation: When AOL(f) is approximately constant up to break frequency, there will be 20dB decrease each time there is a tenfold increase in frequency. Therefore it may be considered that the gain roll of at the rate of 20dB/decade. 2. What is the maximum phase shift that can occur in an op-amp with single capacitor?
A. 180o
B. 60o
C. 270o
D. 90o
Answer:A
Explanation: When AOL(f) is approximately constant up to break frequency, there will be 20dB decrease each time there is a tenfold increase in frequency. Therefore it may be considered that the gain roll of at the rate of 20dB/decade. 2. What is the maximum phase shift that can occur in an op-amp with single capacitor?
A. 180o B. 60o C. 270o D. 90o
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?