Which of these statements is false?
A. The open loop gain AOL(f) dB is approximately constant from 0Hz to fo
B. When input signal frequency and f is equal to break frequency fo, the gain frequency is called -3dB frequency
C. The open loop gain AOL(f) dB is approximately constant upto break frequency fo, but there after it increase 20dB each time there is a tenfold increase in frequency.
D. At unity gain crossover frequency, the open loop gain AOL(f) dB is zero
Answer:A
Which of these statements is false?
A. The open loop gain AOL(f) dB is approximately constant from 0Hz to fo B. When input signal frequency and f is equal to break frequency fo, the gain frequency is called -3dB frequency C. The open loop gain AOL(f) dB is approximately constant upto break frequency fo, but there after it increase 20dB each time there is a tenfold increase in frequency. D. At unity gain crossover frequency, the open loop gain AOL(f) dB is zero
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?