Explanation: Capacitors are used in the high frequency model of the op-amp at the output terminal to maintain or control the frequency. 3. How does the physical characteristic of semiconductor account for the increase in frequency of op-amps?
A. Transistor values
B. Junction capacitance
C. Dopant concentration
D. None of the mentioned
Answer:A
Explanation: Capacitors are used in the high frequency model of the op-amp at the output terminal to maintain or control the frequency. 3. How does the physical characteristic of semiconductor account for the increase in frequency of op-amps?
A. Transistor values B. Junction capacitance C. Dopant concentration D. None of the mentioned
Explanation: Op-amps are composed of BJTs and FETs which contain junction capacitors. These junction capacitors are very small and take finite values at higher frequency. So, when the reactances of these capacitors decrease, the frequency increases. 4. How are op-amp with three break frequency are represented