What is typically a recommended practice for increasing an amplifier's gain without causing instability?

The recommended practice for increasing an amplifier's gain without causing instability is careful adjustment of feedback elements. Feedback in amplifiers is crucial because it can help manage gain and stabilize performance. By adjusting feedback elements, it is possible to maintain desired gain levels while minimizing the risk of oscillation or instability. This involves selecting appropriate resistors and capacitors in the feedback loop, which balance gain and phase shift effectively, ensuring that the amplifier operates within its stable region.

Using a single-ended power supply or limiting input current deals more with power supply configurations and input characteristics, respectively, but do not directly address gain adjustment or stability in the context of feedback loops. Similarly, while multiple feedback paths can alter gain, they may introduce complexity and potential instability if not carefully designed, which is why careful adjustment of feedback elements is the more effective and recommended practice.