This one's bugging me bad; thanks in advance for reading!
I have a simple op amp circuit using a TI LM324N quad op amp package. I am using a dual supply and a signal generator to provide +/- 10VDC power rails and a sine wave referenced to chassis. My op amp has been stripped down to just one channel in a voltage-follower feedback configuration; the other 3 amps are voltage-follower with their inputs hooked to chassis.
The input to the amp is a 40kHz sine wave. When the amplitude is less than 1V peak, the output looks beautiful; overlapping input with output on my scope confirms there is no noticable distortion.
When the input amplitude is more than 1V peak, the output distorts, but only on the negative half of the wave (as far as I can tell by looking at the scope). There are notable discontinuities, and a 600kHz (?) sawtooth pattern that appears--but again, only on the bottom half of the waveform, and with the input clean as a whistle.
Am I doing something really silly here?
Thanks again!
I have a simple op amp circuit using a TI LM324N quad op amp package. I am using a dual supply and a signal generator to provide +/- 10VDC power rails and a sine wave referenced to chassis. My op amp has been stripped down to just one channel in a voltage-follower feedback configuration; the other 3 amps are voltage-follower with their inputs hooked to chassis.
The input to the amp is a 40kHz sine wave. When the amplitude is less than 1V peak, the output looks beautiful; overlapping input with output on my scope confirms there is no noticable distortion.
When the input amplitude is more than 1V peak, the output distorts, but only on the negative half of the wave (as far as I can tell by looking at the scope). There are notable discontinuities, and a 600kHz (?) sawtooth pattern that appears--but again, only on the bottom half of the waveform, and with the input clean as a whistle.
Am I doing something really silly here?
Thanks again!