In amplifier gain adjustments, what does the feedback network do?

The feedback network in an amplifier is crucial for controlling the overall gain of the system. When feedback is implemented, a portion of the output signal is fed back into the input. This process allows for the adjustment of gain by effectively reducing the input signal. When the gain is controlled in this manner, the amplifier can achieve more linear performance and improved stability.

A direct consequence of this feedback mechanism is that it allows the amplifier to respond dynamically to changes in the input or output conditions, effectively making adjustments to maintain the desired level of amplification. This is essential in ensuring that the amplifier operates within its intended specifications without distortion or overload.

In contrast, eliminating noise, increasing frequency response, and stabilizing output voltage are important functions in amplifier design but are achieved through different methods or may be influenced by feedback in different ways, rather than being the primary role of the feedback network itself in terms of gain adjustment.