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In simple terms, for a wide range of radio amateurs, he explained why a resistor and a capacitor are placed in the emitter circuit of a bipolar transistor. He explained how the feedback works for direct and alternating current. He explained that if you increase the capacitance, the roll-off in the low-frequency region decreases, if you decrease the capacitance, the low frequency will not pass. You can make a filter. If you increase the resistor, the depth of the feedback increases, if you decrease it, the feedback will decrease. Support the author and buy a cup of coffee: Sber: 5469 3801 1283 2612