One way to significantly reduce the variations in the CE A_V caused by changes in equivalent ac resistance is to add a(n) A) emitter bypass capacitor B) another amplifier stage C) swamping resistor in the emitter circuit D) larger coupling capacitor

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Adding a swamping resistor in the emitter circuit of a common emitter amplifier stabilizes the gain by reducing the effect of variations in the transistor's beta (β) due to temperature changes or differences between individual transistors. This resistor works by making the total emitter resistance (the sum of the swamping resistor and the emitter's intrinsic resistance) much larger than the intrinsic resistance alone, thus making the amplifier's performance less dependent on the transistor's characteristics.

One Way to Significantly Reduce the Variations in the CE