Which feature of a BUFFER amplifier allows it to increase power output without inverting the signal?

The feature of a BUFFER amplifier that allows it to increase power output without inverting the signal is primarily through amplification and linear operation.

Amplification is the primary function of the BUFFER amplifier, allowing it to strengthen the signal's power level while maintaining the same signal phase. This characteristic is essential for applications where it is necessary to drive a heavier load without distortion.

Linear operation refers to the ability of the BUFFER to operate within a specific range in such a way that it produces an output yield proportionate to the input signal. In buffer amplifiers, linearity is crucial because it ensures that the signal remains faithful and undistorted, even when amplified. This maintains the integrity of the original signal, allowing for higher power output without any inversion.

By combining both amplification and linear operation, BUFFER amplifiers can effectively increase the power of a signal while preserving its original polarity, resulting in a clean and robust output suitable for various applications in digital electronics.