antknee
New Member
I'm currently learning about the LM3886 audio amplifier and a non inverting board with gain of 11. The chip has a minimum GBP of 2MHz but they are rated at up to 8MHz. THe load is just a resistor of 4 ohms and i'm working in the frequency range above audio.
I understand gain bandwidth product as for example this: Gain (11) x bandwidth (100KHz) =< GBP (2MHz)
What I'm finding is the output is also voltage dependant. And it is this bit I don't understand.
For example if I drop the input voltage down to 0.1V I can go up to 500KHz.
How is GBP also voltage dependant?
I have also noticed clipping in some circumstances. The reason for that came to me at that time but has since vanished. Why does that occur?
Thanks for your help.
Antknee.
I understand gain bandwidth product as for example this: Gain (11) x bandwidth (100KHz) =< GBP (2MHz)
What I'm finding is the output is also voltage dependant. And it is this bit I don't understand.
For example if I drop the input voltage down to 0.1V I can go up to 500KHz.
How is GBP also voltage dependant?
I have also noticed clipping in some circumstances. The reason for that came to me at that time but has since vanished. Why does that occur?
Thanks for your help.
Antknee.