I have wondered about the GBWP (gain-bandwidth product) of an op-amp.
Say I have an LM324 rated at a GBWP = 1.1 MHz. I use it in an amplifier to get 10x amplification, limiting bandwidth to 110 kHz (for now, we'll ignore things like slew rate, PSRR, CMRR, noise etc.) I then stack another LM324 on the output, giving me effectively 100x amplification - but the bandwidth stays the same, because the second amp's bandwidth is only divided by its gain, not the total gain product of the two amplifiers.
Is there a flaw in this logic? Would such a configuration really work?
Just out of curiousity.
Say I have an LM324 rated at a GBWP = 1.1 MHz. I use it in an amplifier to get 10x amplification, limiting bandwidth to 110 kHz (for now, we'll ignore things like slew rate, PSRR, CMRR, noise etc.) I then stack another LM324 on the output, giving me effectively 100x amplification - but the bandwidth stays the same, because the second amp's bandwidth is only divided by its gain, not the total gain product of the two amplifiers.
Is there a flaw in this logic? Would such a configuration really work?
Just out of curiousity.