Full Member level 5
Hi all i am trying to learn the basics of amplifier. I understood the basic principle is for a small input we get an amplified output. The output gets the amplification with the help of power supply. So my question is why do we need feedback. We just give an input and get an amplified output ( which is what we want). I read feedback helps in controlling the gain which is infinite in an ideal op-amp. In real the gain is really huge. Why do we need a feedback??? And i read it is to control the gain. And if it does why do we need to control the gain. If the gain is high then it is good to have an high amplified output right. Could anyone pls explain it to me. Thank you!!!!