Hello, to everyone i have a doubt about a basic concept of electronic and i hope someone of you can giude me toward the correct answer.
Let's say i have 2 CMOS amplifiers, usually to calculate the transfer function of the whole amplifier I substitute the transistors with their small signal model and I solve the circuit. However if the first amplifier has high gain (lets say 1000), then can we still consider the input signal of the second amplifier "small"? therefore, is it still correct to use the small signal model for the second stage?
Hope someone can help me. Merry christmas.
Let's say i have 2 CMOS amplifiers, usually to calculate the transfer function of the whole amplifier I substitute the transistors with their small signal model and I solve the circuit. However if the first amplifier has high gain (lets say 1000), then can we still consider the input signal of the second amplifier "small"? therefore, is it still correct to use the small signal model for the second stage?
Hope someone can help me. Merry christmas.