Explanation: Although the output is 180o out of phase with input signal, the gain of the amplifier is not given. 9. Which is not the ideal characteristic of an op-amp?
A. Input Resistance –> 0
B. Output impedance –> 0
C. Bandwidth –> ∞
D. Open loop voltage gain –> ∞
Answer:A
Explanation: Although the output is 180o out of phase with input signal, the gain of the amplifier is not given. 9. Which is not the ideal characteristic of an op-amp?
A. Input Resistance –> 0 B. Output impedance –> 0 C. Bandwidth –> ∞ D. Open loop voltage gain –> ∞
Explanation: Input resistance is infinite so almost any signal source can drive it and there is no loading of the preceding stage. 10. Find the ideal voltage transfer curve of a normal op-amp.